Trying to learn to use this forum properly I am publishing a video that shows an experiment I did to find out how fast the stepper motor could turn. I am using in my model of the sailboat Carina 2 stepper motors like the one shown in the video to work as a winch to control the position of the sails in a system solution where I am realizing this my own way to implement the sheets as shown on the original sailboat Endeavour. This requires my sheet control system to control the length of the sheet of the mainsail i.e. over a range of 8.3 meters. This requires the drum which is turned by the stepper motor to make 21 full turns. Details will be published in my report from scratch of building my Carina.
I found this hull at thingiverse last year. I printed the hull from a local shop and rest was handmade.
Firstly I bought a 2426 4200kv brushless 2-3s which was too powerful and too heavy for the boat size. The length is 38cm.
And the 30Amp esc was also too big for it's size.
After that I tried small 180 brushed motor with 20A brushed esc w/brake. it was perfect (still it's heavy😂).
The bridge and deck is made by 1.75mm pvc,torpedos are made of wooden pencil.
Small battery space takes a 2s 500mah lipo. 30mm 3blade propeller.
Excellent video Sakibian, well done👍
and you're very brave to sail such a tiny boat in waters like that 😲
Hat off Sir 😉
Cheers, Doug 😎
BTW: you should put this boat in your 'Harbour', just click on 'Boat Harbour' on the left of the Home page and then 'Add your model boat' at the top.
Happy that you liked the video , will try to post more videos.
And please don't call me sir haha? I'm still 23.
About the harbour , when I registered here I didn't find my country (Bangladesh), can you please do something while your an Admiral 😛
Only 2nd run of "IMARA Tug", my lad did the shaky video. (O well)
Nice model lots of ballast, batteries, MARX Hectoperm motor for huge power reserve. Running on electric but Cheddar Proteus steam plant also fits in instead with ABC boiler control. plan for the future to try this never run not even on air yet!
great job on the model.Runs nice too.Nice to see lots of lights.Will look great at night.BTW anybody check to see if the Canada geese had their passports.
Built originally in 1973 from a modav kit and powered by an Enya 35bbiii. Now running a 3548 brushless motor and 5800 3 cell lipo. Model in video was running an x35 prop with +/- 20 degrees of rudder, very sensitive on turns. Today's run was on x40 prop considerably faster with reduced rudder throw of +/- 15 degrees. Current draw was 30 amps max watts 376. Still too sensitive on turns.
Doug, Thanks for the reply, as far as I was aware the S type plastic props were less pitch than the X type plastic props. if your 35 mm metal prop is 1.4 pitch then it is similar to the X35 plastic prop I used in the first video. I think I need to investigate diameters and pitch a little more. Last week running my Huntsman I had an X40 plastic prop on and it was too large and way too fast, a friend running a 34 inch fire launch runs an X 35 so I may go back to look at a 😎35 mm dia metal prop and look at the pitch.
Regards Ian
Aha! Now I've learned something too👍 Thanks William
Actually I've been busily changing all my 'frayed' 😲 plastic props for cast brass ones. Cheers, Doug
The Police Launch is a Krick kit which I am currently building. it is a really nice project but, as usual, I just have to add things.
The project is to make the blue light flash. The video shows the three stages of prototyping. The first is the circuit built on a Breadboard. The second part is the actual circuit reduced in size ready to hide inside the boat. The third part is the LED fitted in the incorrect position to show how effective it will be.
I have added a trimmer pot to the circuit so that I can select a suitable frequency that looks right at a later date.
Thanks to Doug for his help to get started and give me some hints about how the circuit works.🤓😊
On Sunday our model boat club did a show at Hamilton's Steam Museum . Kind of hard running model & recording video at the same time but I managed to not run into any ones boat .
A short video of the first trial of my Genesis 9000 Offshore Power Boat. This is a boat to use whilst I build others.
The trial was seriously hampered by a faulty main switch. The insides must have fallen apart during transportation. I did manage to get an electrical contact to get around five minutes of the trial. The boat ran well but I will have to adjust the rudder to give more movement. Just after the video ended, the boat hit a ripple whilst turning and flipped over. No water entered the hull so all was good, except the switch now refused to work at all. The trial was ended and unfortunately will now have to wait until I return to my river in August.😤
I agree with the weight being shifted forward a iittle bit.Bow high in a catamaran will catch too much air causing the boat to flip.All it takes is a good gust of wind.Good speed on the boat.After trials you'll have a good fast boat.
I have brought the wiring home we with me. I will change the switch and take it back with me in August.
I must admit that I thought the stern was a bit low in the water. To evenly distribute the weight, I put in two batteries as suggested. I will try to move the batteries forward to change the centre of gravity.😊
More running in trials, burning fuses out, and complete radio outage and bumping the bank. However some progress made on levelling it out, full speed cannot be reached whilst trying to video by my self. 😎 The Captain "Dennis The Menace" is not a good omen, twice he's got in trouble, yesterday the cabin was flooded up to his waist.
This is a 49" Perkasa built from a ply Precedent kit - the build blog is on this site. Videoed from a 46" Fireboat on a lake in Western Australia. Neither boat is running at top speed, which is spectacular but overscale! Both boats have identical brushless motors. Apologies for the video being a bit long, and for the water on the lens, but this is a first attempt and I hope you enjoy the music.
Very nice video Lauriem !
I'm from France and now on the way re-building of the same initialy started 40 years ago (when I was young !) and I would need your experience (if you agree)
Tell me please if you are OK.
See you
I sold an EXPLORER steam boat kit to my mate Bob and look how he painted it !!!! He intends to call it HUMBUG .....and i wonder why !!! I think he is fitting a WW1 gun to the front of it soon. My red and white boat is far more refined dont you think !! Video taken at TILFORD rural life center Easter Saturday ......an annual toy steam up. Les Breame
The Model is scratch built from Photos and profiles of the internet it is around 52 inches long and currently runs on two Graupner 700 turbo motors (14.4v) and dual Mtroniks 25A ESC (12v) running twin contra rotating 45mm props, this model can spin on its own axis like the real boat but does not use waterjets due to cost. Completed in 2017.
Whats a CB90
Its a Command Boat 90 originally built by Docstar in sweden and later also built in the USA under licence.
The boat has a multi role capability and has be used by the Army, Police, Coast Guard and Ambalence Service
Originally a Military craft for coastal waters and rivers with a shallow draft and powered by twin water jets this 15 ton Aluminum boat can deliver half a platoon directly on to beach heads via its landing craft type single man door at the bow.
This craft has excellent manoveraility and can crash stop ( go into full reverse and stop) in 1.5 x its length. No-wonder the american's wanted this boat.
