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205 posts · Page 12 of 18This will be one of our last days at Crealy in Exeter as the management have decided to terminate our use of the water- so we will be looking for alternatives from January.
- GreggSub-LieutenantI use a little "plug in" voltage alarm on my lipo's. it simply plugs in to the balance charge plug connector. so give you an initial volt test,usually with a few bleeps and a set of green lights, then as the batteries drain, the led's turn red and an alert buzzer goes of as they approach low volt limit, which is set on these alarms at 3.2v, so no damage done to the batteries.I use a little "plug in" voltage alarm on my lipo's. it simply plugs in to the balance charge plug connector. so give you an initial volt test,usually with a few bleeps and a set of green lights, then as the batteries drain, the led's turn red and an alert buzzer goes of as they approach low volt limit, which is set on these alarms at 3.2v, so no damage done to the batteries. Its a quick search on ebay, loads of sellers, cost around £2.50 each. very useful bit of kit poolside as you can check all your lipo batteries, even after being used and left to stand, the batteries do recover a bit and possibly ready again for a further shortened run time too. Happy sailing with your boat, the setup's brill !
Its a quick search on ebay, loads of sellers, cost around £2.50 each.
very useful bit of kit poolside as you can check all your lipo batteries, even after being used and left to stand, the batteries do recover a bit and possibly ready again for a further shortened run time too.
Happy sailing with your boat, the setup's brill ! - ianed57Sub-LieutenantThose are the alarms I intend to use but they seem to be taking a while to come. They are so cheap I intend to install them in the boat with velcro and extension leads on the balance connectors. The lipos certainly give a weight saving too.Those are the alarms I intend to use but they seem to be taking a while to come. They are so cheap I intend to install them in the boat with velcro and extension leads on the balance connectors. The lipos certainly give a weight saving too.
- JulioPetty Officer 1st ClassHello:Hello: I've got a scale model of the pt-109, lindberg and want to build it as soon as possible. Thank you for these photos... very well achieved the warlike atmosphere of the period. Soon I'll post pictures of the work.
I've got a scale model of the pt-109, lindberg and want to build it as soon as possible.
Thank you for these photos... very well achieved the warlike atmosphere of the period.
Soon I'll post pictures of the work.
- sharpy1071Chief Petty Officer 2nd ClassHI Ian, yes Phil did start from a very young age. I've seen photos of him at the Great West Aerodrome (now Heathrow) with free flight petrol in the 1920's.HI Ian, yes Phil did start from a very young age. I've seen photos of him at the Great West Aerodrome (now Heathrow) with free flight petrol in the 1920's. If your going to I of W it's worth calling into Westbourne Models on the way that's if your going along the coast. If your going brushless be warned that the ESC's are a lot of money. I would recommend the Graupner one. I have one and cannot fault it. its a bit strange to program at first but once I got use to it no probs. You can have it for planes, cars, helicopters or boats, it changes the start up differently, I had nothing but trouble with some cheap ones until I went to Westbourne emptied my wallet and put it in my Huntsman by Precedent, the slow speed is fantastic you have so much control and when you open it up it is smooth. I put a water jacket on it and it is always cool no matter how I drive the boat. if you do go to Westbourne let me know, if you like, and you could come in for a drink (tea!) would like to meet you, speak to you soon, Brian
If your going to I of W it's worth calling into Westbourne Models on the way that's if your going along the coast.
If your going brushless be warned that the ESC's are a lot of money. I would recommend the Graupner one. I have one and cannot fault it. its a bit strange to program at first but once I got use to it no probs. You can have it for planes, cars, helicopters or boats, it changes the start up differently, I had nothing but trouble with some cheap ones until I went to Westbourne emptied my wallet and put it in my Huntsman by Precedent, the slow speed is fantastic you have so much control and when you open it up it is smooth. I put a water jacket on it and it is always cool no matter how I drive the boat. if you do go to Westbourne let me know, if you like, and you could come in for a drink (tea!) would like to meet you,
speak to you soon, Brian
- Dave MVice AdmiralHI IanHI Ian See you are making good use of the wattmeter 😀 Like the video and agree the balance could benefit with a bit more weight amidships. Listening to the video sound suggests your motors are not developing full power so I suspect the NiMh's are not capable of delivering the amps required. You could try smaller props with the NiMh's to see if the performance Improves, could be your motors are working just below the optimum.
See you are making good use of the wattmeter 😀
Like the video and agree the balance could benefit with a bit more weight amidships.
Listening to the video sound suggests your motors are not developing full power so I suspect the NiMh's are not capable of delivering the amps required.
You could try smaller props with the NiMh's to see if the performance Improves, could be your motors are working just below the optimum. - ianed57Sub-LieutenantDave, I found that the Nimh batteries were dropping off to around 9v at full power when measured with the wattmeter and this is why I want to go for Lipos, one on each motor. At the moment I'm taking everything from one pack and I think this is the limiting factor.Dave, I found that the Nimh batteries were dropping off to around 9v at full power when measured with the wattmeter and this is why I want to go for Lipos, one on each motor. At the moment I'm taking everything from one pack and I think this is the limiting factor. When I get my Lipos I will stick them in the middle and try larger props, probably 40mmS types to begin with, having measured what's going on with the wattmeter first. it may be that the existing props will do better if the batteries are delivering up what the motors want. You're right, there is still plenty of headroom with this setup. Just got to rake up the cash for two largish capacity Lipos! The wattmeter is a splendid purchase- I'd say essential for this type of thing. Anyway, glad you liked the video- she still looks quite good toodling around at that speed. All the best...Ian
When I get my Lipos I will stick them in the middle and try larger props, probably 40mmS types to begin with, having measured what's going on with the wattmeter first. it may be that the existing props will do better if the batteries are delivering up what the motors want. You're right, there is still plenty of headroom with this setup.
Just got to rake up the cash for two largish capacity Lipos!
The wattmeter is a splendid purchase- I'd say essential for this type of thing.
Anyway, glad you liked the video- she still looks quite good toodling around at that speed.
All the best...Ian
- ianed57Sub-LieutenantBrian,Brian, Ouch! Sounds a bit expensive.On the advice of Dave M on this forum I bought myself a wattmeter and it certainly takes the guesswork out. I went through three esc's on my Lesro Sportsman before I got it right- hopefully! Also spent a good deal of time anxiously waiting for my Rapier to drift back to shore after it popped a fuse- twice. Now I know what the limits are and I just didn't have a big enough fuse in. I'm having just what you describe with batteries being too far astern- I'm going out Monday to try them in the middle of the boat. Also hoping to get some LiPos when I have decided on a make. Hope the new motors and fans work out and that you get some good shots on the water eventually. All the best...Ian
Ouch! Sounds a bit expensive.On the advice of Dave M on this forum I bought myself a wattmeter and it certainly takes the guesswork out. I went through three esc's on my Lesro Sportsman before I got it right- hopefully! Also spent a good deal of time anxiously waiting for my Rapier to drift back to shore after it popped a fuse- twice. Now I know what the limits are and I just didn't have a big enough fuse in.
I'm having just what you describe with batteries being too far astern- I'm going out Monday to try them in the middle of the boat. Also hoping to get some LiPos when I have decided on a make.
Hope the new motors and fans work out and that you get some good shots on the water eventually.
All the best...Ian - sharpy1071Chief Petty Officer 2nd ClassHI Ian, well the original motors came from a discount store, £2.00 each from memory, they work Ok in my USS Crokett, but I have no glazing and the hot air can escape! I think the sequence went like got hot, melted fan, fan fell off, jammed Motor, fuse blew. I couldn't get any water cooling pre bent from Westbourne so will make my own tomorrow. I have opened up the funnel a bit more on the side and place louvres over the hole, I will get a photo. I did use LIPOs (turnigy 3cell 3500) but now have gone over to A123's much better I have 3 in series X 3 in parellel Giving 6600 MAmps @ 10.4volts.These are very safe batteries, almost unbreakable, I use them in my planes they weigh a little more than LIPOs but a lot less than Gel cells about a quarter and can be forces charged but you would have to sail all day to flatten them. Thanks for your interest, speak to you soon, BrianHI Ian, well the original motors came from a discount store, £2.00 each from memory, they work Ok in my USS Crokett, but I have no glazing and the hot air can escape! I think the sequence went like got hot, melted fan, fan fell off, jammed Motor, fuse blew. I couldn't get any water cooling pre bent from Westbourne so will make my own tomorrow. I have opened up the funnel a bit more on the side and place louvres over the hole, I will get a photo. I did use LIPOs (turnigy 3cell 3500) but now have gone over to A123's much better I have 3 in series X 3 in parellel Giving 6600 MAmps @ 10.4volts.These are very safe batteries, almost unbreakable, I use them in my planes they weigh a little more than LIPOs but a lot less than Gel cells about a quarter and can be forces charged but you would have to sail all day to flatten them. Thanks for your interest, speak to you soon, Brian
- GreggSub-LieutenantI would try and leave the cooling slots fully open, to allow air to circulate through the motor internals. Same goes for any air slots in the front face of the motor, always try and make a hole on the motor mount [if none in], to aid airflow through the motor.I would try and leave the cooling slots fully open, to allow air to circulate through the motor internals. Same goes for any air slots in the front face of the motor, always try and make a hole on the motor mount [if none in], to aid airflow through the motor. if you cover the slots up, you are only adding to the internal temperature of the motor you are trying to cool.
if you cover the slots up, you are only adding to the internal temperature of the motor you are trying to cool.
- circle43nauticalChief Petty Officer 2nd ClassBRAVO ZULU! REALLY COOL SIR.BRAVO ZULU! REALLY COOL SIR.
- jelley_babyChief Petty Officer 1st ClassHI Rob if you have an email address that I could use I have photos of the boat, a friend at my club is also restoring one so I have just taken some photos but I could take some more of the areas that you require easily, sadly I do not have a plan myself as my polar was bought on Ebay at least 5 years ago and I had to work from a billing catalogue photo and some photos from old Model Boat Magazines. Hope to hear from you if that will help.HI Rob if you have an email address that I could use I have photos of the boat, a friend at my club is also restoring one so I have just taken some photos but I could take some more of the areas that you require easily, sadly I do not have a plan myself as my polar was bought on Ebay at least 5 years ago and I had to work from a billing catalogue photo and some photos from old Model Boat Magazines. Hope to hear from you if that will help. Graham
Graham - Robertoc2109RecruitGrahamGraham Thanks so much for getting back my email is *PM only - Admin*. Any advice or extra pics would be great I really appreciate it. I will upload a pic of the boat at the weekend and show everyone the PROJECT 😯 Thanks again Rob
Thanks so much for getting back my email is PM only - Admin. Any advice or extra pics would be great I really appreciate it. I will upload a pic of the boat at the weekend and show everyone the PROJECT 😯
Thanks again Rob