Just a couple of Submarines - from BMBC local Buxton Model Boat Club Submarine enthusiasts.
DONT FORGET - More photos can be viewed on the link for " BOATS CLUBS & LAKES "
( Highlight the link, then Right click go to > )
https://model-boats.com/places/60518
{"text":"Just a couple of Submarines - from BMBC local Buxton Model Boat Club Submarine enthusiasts.\n\nDONT FORGET - More photos can be viewed on the link for \" BOATS CLUBS & LAKES \"\n\n( Highlight the link, then Right click go to > )\n\nhttps://model-boats.com/places/60518","subject":"Submarines","media":[],"youtubeUrl":"https://www.youtube.com/watch?v=sk0Kv96yugw"}
Second test was slightly better, using the aluminium spiral cut universal which came with the jet unit. As you can probably hear, it was horribly out of balance (even with cable ties to reduce it). It was not even drilled centrally and the spiral is right hand when it should be left hand, (like a spring twisted against the wind, it wants to deform). Slight improvement in speed on the first test (no slip this time) but the noise was horrendous.
Have pulled the jet apart and found that the 3 blade prop is around 1 mm too small for the hole, causing cavitation (see loads of bubbles in the jet stream) which is causing loss of thrust. The prop is the wrong type as well, with rounded blades, so I have modified a larger prop with more pitch to fit snugly in the unit to hopefully increase thrust. The shaft is also wrong, with a flat cut almost half the diam and carrying on through the bearing, allowing the grease to fly out.
I actually saw a Chinese site on Al Expr stating that "some dimensions on the product may be different due to the number of machines and operators involved in its' manufacture," SERIOUSLY!!??? their quality control must be utter crap and the operators not skilled enough to eat their lunch😐 Why bother having a dimension at all?? Little wonder nothing fits properly.
Unfortunately, most model shops sell the very same stuff, unless you want to shell out muchos dolleros for European stuff. I have just ordered some 4mm silver steel to make a new shaft, so a coupling or silicone tube will fit better. Also ordered some solid connectors to try. Vibration is wasted energy so it needs to be eliminated. Hopefully the mods will improve things and allow the motor to run on 4s rater than 3s. Worked out that the motor is only 1200KV, so it's only doing around 13,000 rpm under load. Probably will need around
18,000 rpm for proper performance. Onwards and upwards (or forwards as the case may be.😁)
Sorry about the blurry vid again, but my camera lens is knackered.
{"text":"Second test was slightly better, using the aluminium spiral cut universal which came with the jet unit. As you can probably hear, it was horribly out of balance (even with cable ties to reduce it). It was not even drilled centrally and the spiral is right hand when it should be left hand, (like a spring twisted against the wind, it wants to deform). Slight improvement in speed on the first test (no slip this time) but the noise was horrendous.\n\nHave pulled the jet apart and found that the 3 blade prop is around 1 mm too small for the hole, causing cavitation (see loads of bubbles in the jet stream) which is causing loss of thrust. The prop is the wrong type as well, with rounded blades, so I have modified a larger prop with more pitch to fit snugly in the unit to hopefully increase thrust. The shaft is also wrong, with a flat cut almost half the diam and carrying on through the bearing, allowing the grease to fly out. \n\nI actually saw a Chinese site on Al Expr stating that \"some dimensions on the product may be different due to the number of machines and operators involved in its' manufacture,\" SERIOUSLY!!??? their quality control must be utter crap and the operators not skilled enough to eat their lunch\ud83d\ude10 Why bother having a dimension at all?? Little wonder nothing fits properly.\n\nUnfortunately, most model shops sell the very same stuff, unless you want to shell out muchos dolleros for European stuff. I have just ordered some 4mm silver steel to make a new shaft, so a coupling or silicone tube will fit better. Also ordered some solid connectors to try. Vibration is wasted energy so it needs to be eliminated. Hopefully the mods will improve things and allow the motor to run on 4s rater than 3s. Worked out that the motor is only 1200KV, so it's only doing around 13,000 rpm under load. Probably will need around \n18,000 rpm for proper performance. Onwards and upwards (or forwards as the case may be.\ud83d\ude01)\n\nSorry about the blurry vid again, but my camera lens is knackered.","subject":"HARTLEY FLARELINE, NEW PROJECT, TEST 2","media":[],"youtubeUrl":"https://www.youtube.com/watch?v=RNEN5dkr8CY"}
Second test was slightly better, using the aluminium spiral cut universal which came with the jet unit. As you can probably hear, it was horribly out of balance (even with cable ties to reduce it). It was not even drilled centrally and the spiral is right hand when it should be left hand, (like a spring twisted against the wind, it wants to deform). Slight improvement in speed on the first test (no slip this time) but the noise was horrendous.
Have pulled the jet apart and found that the 3 blade prop is around 1 mm too small for the hole, causing cavitation (see loads of bubbles in the jet stream) which is causing loss of thrust. The prop is the wrong type as well, with rounded blades, so I have modified a larger prop with more pitch to fit snugly in the unit to hopefully increase thrust. The shaft is also wrong, with a flat cut almost half the diam and carrying on through the bearing, allowing the grease to fly out.
I actually saw a Chinese site on Al Expr stating that "some dimensions on the product may be different due to the number of machines and operators involved in its' manufacture," SERIOUSLY!!??? their quality control must be utter crap and the operators not skilled enough to eat their lunch😐 Why bother having a dimension at all?? Little wonder nothing fits properly.
Unfortunately, most model shops sell the very same stuff, unless you want to shell out muchos dolleros for European stuff. I have just ordered some 4mm silver steel to make a new shaft, so a coupling or silicone tube will fit better. Also ordered some solid connectors to try. Vibration is wasted energy so it needs to be eliminated. Hopefully the mods will improve things and allow the motor to run on 4s rater than 3s. Worked out that the motor is only 1200KV, so it's only doing around 13,000 rpm under load. Probably will need around
18,000 rpm for proper performance. Onwards and upwards (or forwards as the case may be.😁)
Sorry about the blurry vid again, but my camera lens is knackered.
Weather was perfect tonight for a test, so I did the 15km trip out to the Gulf harbour pond (most weed free pond) to throw the boat in. After a thorough under water hull inspection from the marine department, she was off. Everything worked ok except the silicone drive tube which had become enlarged due to soaking in the grease coming out the front of the jet shaft. It was slipping badly and probably losing about 60% of its' thrust. Manoeuvrability is excellent but reverse leaves a bit to be be desired. Steering in reverse is perfect but the thrust is not going forwards enough from the bucket. Might have to build in some nozzles to direct it better.
Smoke air and water are working as well as can be expected, (smoke is a bit wafty, but with too much air introduced it will disappear as it gets thinned out too much to see) I was not expecting miracles as this was a bit of an experiment (modified cheap jet unit with unknown abilities) but at least it shows promise😁. If I can find a coupling which is concentric it will solve the drive problem.
Trouble is, the Chinese insist on making a 4mm shaft, 4.95 (or whatever) which is useless for balance in a 4mm ID bearing for example. Fine for cars, but no good for boats or planes due to balance requirements (it's a mission trying to balance plane props due to this thinking,- they do it with everything) shafts for electric motors are a nightmare at times as the play they build in, can ruin an otherwise good motor. I might have to buy a flexible rubber/nylon universal or a collet style( preferable as these take up any undersize on shafts) to fix it. They included a spiral alloy one with the jet unit which is as loose as a rooster in a sock, and only good for slower things like 3D printers etc. One of these days they will learn how to machine things to fit.😐
{"text":"Weather was perfect tonight for a test, so I did the 15km trip out to the Gulf harbour pond (most weed free pond) to throw the boat in. After a thorough under water hull inspection from the marine department, she was off. Everything worked ok except the silicone drive tube which had become enlarged due to soaking in the grease coming out the front of the jet shaft. It was slipping badly and probably losing about 60% of its' thrust. Manoeuvrability is excellent but reverse leaves a bit to be be desired. Steering in reverse is perfect but the thrust is not going forwards enough from the bucket. Might have to build in some nozzles to direct it better.\n\nSmoke air and water are working as well as can be expected, (smoke is a bit wafty, but with too much air introduced it will disappear as it gets thinned out too much to see) I was not expecting miracles as this was a bit of an experiment (modified cheap jet unit with unknown abilities) but at least it shows promise\ud83d\ude01. If I can find a coupling which is concentric it will solve the drive problem. \n\nTrouble is, the Chinese insist on making a 4mm shaft, 4.95 (or whatever) which is useless for balance in a 4mm ID bearing for example. Fine for cars, but no good for boats or planes due to balance requirements (it's a mission trying to balance plane props due to this thinking,- they do it with everything) shafts for electric motors are a nightmare at times as the play they build in, can ruin an otherwise good motor. I might have to buy a flexible rubber/nylon universal or a collet style( preferable as these take up any undersize on shafts) to fix it. They included a spiral alloy one with the jet unit which is as loose as a rooster in a sock, and only good for slower things like 3D printers etc. One of these days they will learn how to machine things to fit.\ud83d\ude10","subject":"HARTLEY FLARELINE, NEW PROJECT FIRST TEST","media":[],"youtubeUrl":"https://www.youtube.com/watch?v=xsCC52Sr-Nk"}
Weather was perfect tonight for a test, so I did the 15km trip out to the Gulf harbour pond (most weed free pond) to throw the boat in. After a thorough under water hull inspection from the marine department, she was off. Everything worked ok except the silicone drive tube which had become enlarged due to soaking in the grease coming out the front of the jet shaft. It was slipping badly and probably losing about 60% of its' thrust. Manoeuvrability is excellent but reverse leaves a bit to be be desired. Steering in reverse is perfect but the thrust is not going forwards enough from the bucket. Might have to build in some nozzles to direct it better.
Smoke air and water are working as well as can be expected, (smoke is a bit wafty, but with too much air introduced it will disappear as it gets thinned out too much to see) I was not expecting miracles as this was a bit of an experiment (modified cheap jet unit with unknown abilities) but at least it shows promise😁. If I can find a coupling which is concentric it will solve the drive problem.
Trouble is, the Chinese insist on making a 4mm shaft, 4.95 (or whatever) which is useless for balance in a 4mm ID bearing for example. Fine for cars, but no good for boats or planes due to balance requirements (it's a mission trying to balance plane props due to this thinking,- they do it with everything) shafts for electric motors are a nightmare at times as the play they build in, can ruin an otherwise good motor. I might have to buy a flexible rubber/nylon universal or a collet style( preferable as these take up any undersize on shafts) to fix it. They included a spiral alloy one with the jet unit which is as loose as a rooster in a sock, and only good for slower things like 3D printers etc. One of these days they will learn how to machine things to fit.😐
Seemed to work a whole lot better in the tank for some reason Martin. Possibly due to the coupling slipping, (the squealing is it slipping) Just a bit of silicone fuel tube. I use it on all the boats as it's quiet, self aligning, and lets go if your prop gets jammed by weed. Problem is with the jet, it has a flat on the shaft for some reason which doesn't help the tube grip, and lets grease in causing slippage. I'll sort it eventually,- didn't expect miracles first time out (same with planes) - Almost always some small initial problems.
Motor should be spinning at 15,000 rpm with a 3 cell, but performance is not matching that, obviously,- just piddling along😁 Mind you, I used to cruise like that in the full sized boat, as the Zodiac motor used to suck gas like nothing at 20 knots plus, (gallons per mile, not miles per gallon!)
JB
Seemed to work a whole lot better in the tank for some reason Martin. Possibly due to the coupling slipping, (the squealing is it slipping) Just a bit of silicone fuel tube. I use it on all the boats as it's quiet, self aligning, and lets go if your prop gets jammed by weed. Problem is with the jet, it has a flat on the shaft for some reason which doesn't help the tube grip, and lets grease in causing slippage. I'll sort it eventually,- didn't expect miracles first time out (same with planes) - Almost always some small initial problems.
Motor should be spinning at 15,000 rpm with a 3 cell, but performance is not matching that, obviously,- just piddling along😁 Mind you, I used to cruise like that in the full sized boat, as the Zodiac motor used to suck gas like nothing at 20 knots plus, (gallons per mile, not miles per gallon!)
JB
Smoke air and water switching sequence, (sound's out of sync for some reason,)
{"text":"Smoke air and water switching sequence, (sound's out of sync for some reason,)","subject":"HARTLEY SMOKE 2","media":[],"youtubeUrl":"https://www.youtube.com/watch?v=LkehOxet7VQ"}
A bit more refinement on the timing but getting there. Finally got the voltage regs from China to complete the system. A bit noisy, as the water pump is dry,- quietens down with water. Switches in stages using Grahams magic timer, - 1. smoke on, 2. water and air on. There is actually smoke running constantly at a reduced level once everything is running, but very hard to film. I could turn it up but I don't want it to look like it's on fire😂
{"text":"A bit more refinement on the timing but getting there. Finally got the voltage regs from China to complete the system. A bit noisy, as the water pump is dry,- quietens down with water. Switches in stages using Grahams magic timer, - 1. smoke on, 2. water and air on. There is actually smoke running constantly at a reduced level once everything is running, but very hard to film. I could turn it up but I don't want it to look like it's on fire\ud83d\ude02","subject":"HARTLEY FLARELINE, NEW PROJECT - STARTUP SMOKE TEST","media":[],"youtubeUrl":"https://www.youtube.com/watch?v=31lTklh4ciQ"}
HARTLEY FLARELINE, NEW PROJECT - STARTUP SMOKE TEST
A bit more refinement on the timing but getting there. Finally got the voltage regs from China to complete the system. A bit noisy, as the water pump is dry,- quietens down with water. Switches in stages using Grahams magic timer, - 1. smoke on, 2. water and air on. There is actually smoke running constantly at a reduced level once everything is running, but very hard to film. I could turn it up but I don't want it to look like it's on fire😂
"Fairey Huntsman" - Following renewed recent interest from Model Boats Website members,
here are three variations from BMBC members of the popular "Huntsman".
(Ref from Wikipedia)
Fairey Huntsman / Fairey Huntsman 28 / Fairey Huntsman 31: The design of the Huntsman and its smaller sister, the Huntress were the inspiration of Ray Hunt and designed by Alan Burnard.
{"text":"\"Fairey Huntsman\" - Following renewed recent interest from Model Boats Website members,\nhere are three variations from BMBC members of the popular \"Huntsman\".\n\n(Ref from Wikipedia)\nFairey Huntsman / Fairey Huntsman 28 / Fairey Huntsman 31: The design of the Huntsman and its smaller sister, the Huntress were the inspiration of Ray Hunt and designed by Alan Burnard.","subject":"\"Fairey Huntsman\"","media":[{"id":"160752629749","name":"160752629749","caption":"","url":"https://hobby.land/media/160752629749/l","thumbUrl":"https://hobby.land/media/160752629749/s","isImage":false,"ext":"file"}],"youtubeUrl":"https://www.youtube.com/watch?v=18z-zi6nuak"}
"Fairey Huntsman" - Following renewed recent interest from Model Boats Website members,
here are three variations from BMBC members of the popular "Huntsman".
(Ref from Wikipedia)
Fairey Huntsman / Fairey Huntsman 28 / Fairey Huntsman 31: The design of the Huntsman and its smaller sister, the Huntress were the inspiration of Ray Hunt and designed by Alan Burnard.
Some details of Thor. - by Dean Ratcliffe.
Thor is a freelance design of a multicat vessel. These rather unusual ships are real workhorses, designed as a work platform, often with a hiab crane. The square hull gives a large flat deck, with plenty of open space for a work area or for deck cargo. The design also enables the vessel to be used as a tugboat, either pushing or towing and are often equipped with large deck winches and strong points for this purpose. A true Swiss army knife of the sea, able to adapt to most roles, some even have additional internal fuel tanks for refuelling other vessels.
More info found on -
Model Boats Website - BoatClubs & Lakes - Buxton Model Boat Club
https://model-boats.com/places/60518
{"text":"Some details of Thor. - by Dean Ratcliffe.\n\nThor is a freelance design of a multicat vessel. These rather unusual ships are real workhorses, designed as a work platform, often with a hiab crane. The square hull gives a large flat deck, with plenty of open space for a work area or for deck cargo. The design also enables the vessel to be used as a tugboat, either pushing or towing and are often equipped with large deck winches and strong points for this purpose. A true Swiss army knife of the sea, able to adapt to most roles, some even have additional internal fuel tanks for refuelling other vessels. \nMore info found on - \nModel Boats Website - BoatClubs & Lakes - Buxton Model Boat Club\n\nhttps://model-boats.com/places/60518","subject":"\" Thor \" - freelance design of a multicat vessel.","media":[],"youtubeUrl":"https://www.youtube.com/watch?v=8U9SxC00RiE"}
Thor is a freelance design of a multicat vessel. These rather unusual ships are real workhorses, designed as a work platform, often with a hiab crane. The square hull gives a large flat deck, with plenty of open space for a work area or for deck cargo. The design also enables the vessel to be used as a tugboat, either pushing or towing and are often equipped with large deck winches and strong points for this purpose. A true Swiss army knife of the sea, able to adapt to most roles, some even have additional internal fuel tanks for refuelling other vessels.
More info found on -
Model Boats Website - BoatClubs & Lakes - Buxton Model Boat Club
A couple of shots taken at Dovercourt in September 2016. I was visiting and so am not able to tell you anything of the boats or skippers. Dovercourt is a salt water pond and plays havoc with switches and brass fittings.
Geof L.
{"text":"A couple of shots taken at Dovercourt in September 2016. I was visiting and so am not able to tell you anything of the boats or skippers. Dovercourt is a salt water pond and plays havoc with switches and brass fittings.\nGeof L.","subject":"Dovercourt on a sunny September day 2016","media":[{"id":"160733197191","name":"160733197191","caption":"","url":"https://hobby.land/media/160733197191/l","thumbUrl":"https://hobby.land/media/160733197191/s","isImage":false,"ext":"file"},{"id":"160733197423","name":"160733197423","caption":"","url":"https://hobby.land/media/160733197423/l","thumbUrl":"https://hobby.land/media/160733197423/s","isImage":false,"ext":"file"}],"youtubeUrl":""}
A couple of shots taken at Dovercourt in September 2016. I was visiting and so am not able to tell you anything of the boats or skippers. Dovercourt is a salt water pond and plays havoc with switches and brass fittings.
Geof L.
Just a short relaxing montage of memories.
Local model club members sailing at various locations in and around Derbyshire after first lockdown !.⛵⛵⛵⛵⛵
{"text":"Just a short relaxing montage of memories. \nLocal model club members sailing at various locations in and around Derbyshire after first lockdown !.\u26f5\u26f5\u26f5\u26f5\u26f5","subject":"Wee Nip - memories","media":[],"youtubeUrl":"https://www.youtube.com/watch?v=KCtFD86iA8A"}
Hi Peter, nice to hear from you and that the majority of Australia and borders have re-opened and that you guys managing to get back to the lake/ pond !.
Ok on your observations, for sails I mainly use ripstop nylon, mainly for colour variety and good light/med weather. I dont usually sail in heavy weather but I do have 1 suit made from a more ridgid sail cloth which certanly holds its form better. However, I do find that ,the ripstop does absorb streatch in heavier winds thus inducing a bit of "belly". I really must get hold of some mylar to try myself.
I dont recall cutting to a triangular shape as I use a template (see photo) however I recently joined up two 2 panels with double sided tape, then did a 3 panel suit (again in ripstop) which
added a batten like rigidity.
I do enjoy trying out other materials and design options within the Wee Nip design brief, but now also getting fun from filming other members boats from the "Camera Nip".
Take care Pete - cheers and beers !
Phil
Hi Peter, nice to hear from you and that the majority of Australia and borders have re-opened and that you guys managing to get back to the lake/ pond !.
Ok on your observations, for sails I mainly use ripstop nylon, mainly for colour variety and good light/med weather. I dont usually sail in heavy weather but I do have 1 suit made from a more ridgid sail cloth which certanly holds its form better. However, I do find that ,the ripstop does absorb streatch in heavier winds thus inducing a bit of "belly". I really must get hold of some mylar to try myself.
I dont recall cutting to a triangular shape as I use a template (see photo) however I recently joined up two 2 panels with double sided tape, then did a 3 panel suit (again in ripstop) which
added a batten like rigidity.
I do enjoy trying out other materials and design options within the Wee Nip design brief, but now also getting fun from filming other members boats from the "Camera Nip".
Take care Pete - cheers and beers !
Phil[{"id":"157364309457","name":"157364309457","caption":"","url":"https:\/\/hobby.land\/media\/157364309457\/l","thumbUrl":"https:\/\/hobby.land\/media\/157364309457\/s","isImage":false,"ext":"file"},{"id":"157364305040","name":"157364305040","caption":"","url":"https:\/\/hobby.land\/media\/157364305040\/l","thumbUrl":"https:\/\/hobby.land\/media\/157364305040\/s","isImage":false,"ext":"file"},{"id":"159254866748","name":"159254866748","caption":"","url":"https:\/\/hobby.land\/media\/159254866748\/l","thumbUrl":"https:\/\/hobby.land\/media\/159254866748\/s","isImage":false,"ext":"file"},{"id":"160192301392","name":"160192301392","caption":"","url":"https:\/\/hobby.land\/media\/160192301392\/l","thumbUrl":"https:\/\/hobby.land\/media\/160192301392\/s","isImage":false,"ext":"file"},{"id":"160692525578","name":"160692525578","caption":"","url":"https:\/\/hobby.land\/media\/160692525578\/l","thumbUrl":"https:\/\/hobby.land\/media\/160692525578\/s","isImage":false,"ext":"file"}]
PS , recently tried prop for auxilary power ! - but reverted to sail !! - Next, going to try a stern mounted deck mounted pusher !!!!!🤞
Phil
PS , recently tried prop for auxilary power ! - but reverted to sail !! - Next, going to try a stern mounted deck mounted pusher !!!!!🤞
Phil[{"id":"160692593860","name":"160692593860","caption":"","url":"https:\/\/hobby.land\/media\/160692593860\/l","thumbUrl":"https:\/\/hobby.land\/media\/160692593860\/s","isImage":false,"ext":"file"}]
Airboat on board camera added. You can watch both of these vids together if you start them one after the other and adjust the sync by quickly pausing the one which is ahead till they match. Who didn't know that then?😁 Only works in std view not full screen.
{"text":"Airboat on board camera added. You can watch both of these vids together if you start them one after the other and adjust the sync by quickly pausing the one which is ahead till they match. Who didn't know that then?\ud83d\ude01 Only works in std view not full screen.","subject":"Airboat, getting back to it (camera)","media":[],"youtubeUrl":"https://www.youtube.com/watch?v=m0o-SUxY1NI"}
Airboat on board camera added. You can watch both of these vids together if you start them one after the other and adjust the sync by quickly pausing the one which is ahead till they match. Who didn't know that then?😁 Only works in std view not full screen.
Added some strakes to the bottom, and added some down thrust to the motor (to push the stern down) which has made it run a lot straighter and with more control on full power. Also added a camera mount as well.
{"text":"Added some strakes to the bottom, and added some down thrust to the motor (to push the stern down) which has made it run a lot straighter and with more control on full power. Also added a camera mount as well.","subject":"AIRBOAT, GETTING BACK TO IT (SOME IMPROVEMENTS)","media":[],"youtubeUrl":"https://www.youtube.com/watch?v=Cj3emPZjOqc"}
Added some strakes to the bottom, and added some down thrust to the motor (to push the stern down) which has made it run a lot straighter and with more control on full power. Also added a camera mount as well.
Jb,
Definitely looks more controllable, you may have tamed the beast at last or she is saving up a little surprise that she will give to you latter.LOL!!
Martin555.
Jb,
Definitely looks more controllable, you may have tamed the beast at last or she is saving up a little surprise that she will give to you latter.LOL!!
Martin555.
Tug: Brooklyn tub test!
You can barely see it!
But, there's actually steam coming out of the Smoke Stack!
Simulated of course! LOL!
{"text":"Tug: Brooklyn tub test!\n\nYou can barely see it!\n\nBut, there's actually steam coming out of the Smoke Stack! \n\nSimulated of course! LOL!","subject":"Tug: Brooklyn!","media":[],"youtubeUrl":"https://www.youtube.com/watch?v=os2igFDogn8"}
