Just a thought- The component shop does do a voltage reducer rated at 6 Amps power draw, and will drop from DC (10.5-40v to 1-9v) I thought about using one of these to run a 6v volt Marx Hectoperm motor from a 12v source, to save buying a new battery. As long as your motor speed controller setup doesn't draw more than say 4~4.5 Amps. I'm my case the tug had 4 x 6Ahr 6v batteries wired in parallel giving 16Ahr and 2-1/2 hours running time @full speed. These batteries have since all died due to age. I wanted to use just 1 x 20Ahr 12v battery instead and keep the added ballast I need anyway. This 6 amp unit is on the limit in my application. P.S i'm tight with money and I acquired the battery free from an alarm battery swap.
[Score: 5/10] 54" Cervia Single Propellor (4 Blade 100mm) Direct Drive to a 4 Cylinder Sealion Eng (4 Blade) - Comments: Maybe the next boat to finish from my dad list of unfinished projects. Just 3 boats to go and 3 petrol engines to consider. This was to be petrol electric with LandRover wiper motors to power from a generator driven by the 4 cylinder 4 stroke petrol engine.
Following a visit to the International boat show for bits and pieces I took advantage of x-factory rubbish on the TV to escape the wife, and do some more on the boat. Handrails to the rear in progress. Interesting tip I bought some 3/32 steam nipple fittings which after running a 2mm drill to the point allow my 2mm brass wire to push through. The idea being a nice finish to the bottom of the handrail and a secure mounting hole so the hand rail can be removed if needed. see picture you will get the idea the ladder one is a lager size 1/8 fitting for welding wire. Just need to add the cross pieces and solder up.
I have to measure stuff in metric and my brain is 75% metric 25% thumb. The drawings are imperial my lathe is imperial but I make the parts to drawing measuring in metric. Most of the screws and bolts are all metric aside from the boiler fittings. Makes sense using stainless fixings I can get from work rather than making 7BA nuts or paying through the nose for them.
Ran the model again Sunday for the last time this year, proved well with a little ballast added. After 15 minutes of running checked the temps on the motor, Only just detect the suggestion of warming up, being such a cold day. The water cooling scoop has not been added as yet. Maybe not even needed at all. Hope to continue to source / make the fittings oven the coming months with the boat show Saturday perhaps for a new LiPo battery.
The hobby doesn't have to cost the earth I made some ladders from welding brass filler wire, and an exhaust outlet from a draw knob I found whilst walking to the shops. Also done some additional planking using stirrer sticks from costa fortune coffee shop. (My son grabbed me a hand full enough for a life time's modelling).
Well I moved away from boats for just over 9 years to build something more challenging, still not complete after more than 3000 hours of work. Thought id share it since its not going to many shows due to moving it. Steve (make steam not war)
I going again following a break of a few years hope it's better attended than the model engineers show. This year was my final year of going after attending every show for the last 20+ years. People packup up at 2pm when the show is on till 4 and decline of actual model engineering. Not winging just not enjoyed as much as other years.
The best I can do is when I get a new battery put it in cross ways, the 3 sticks that I used for a test were already near the back, just length ways down the boat. I added some weights behind the rudder shaft that helped a little not these photographs. Some fettling needed next year when the season starts again. Cheers all
First run on the water, was not pushing it just checking temps and drive. The batteries were at about 25% down on top speed when I decided to make a video. The Tornado 850 motor and 60A speed controller seem well suited to the job.
Decided to try it out Sunday, no major problems need a bit more weight in the back. Good turn of speed even with old recycled ni-cads from a drill pack. will be looking to get a lipo pack in the new year but pleased.
Cheers all - I showed her the comments since she doesn't do computers. She's keen to go to the model boat show Warwick to see how much they sell for, since she's been making them for various boats over the last 50 years.
I've mislead you , the speed controller I bought was a 50A controller - Marine New lipo safe version. It said motor current, so I guessed 10 amps. Being an electrical engineer I added a good factor of safety it works well. No expensive smoke.
[Score: 10/10] 32"/2100g John? Capable of 6mph and a runtime of 35mins Single Propellor (2 Blade X Type 45mm) Direct Drive to a MFA Torpedo 850 (2 Blade X Type) Powered by LiPoly (11.1v) 8Amp/h Batteries Controlled Through Mtroniks tio Marine50 (10Amps) ESC - Comments: Still being built but almost finished, and worth adding. will update after first proper run at Bournville.
Have been making steady progress on the Huntsman. Few additional fitting I acquired and me mom has been busy knitting boat fenders front and for the sides. Amazing she can almost knit one as faster than I can chamfer a cork in the lathe to fill it with. (pictures attached). I'm not sure the masking tape she attached them will cope with the speed and the wet. I guess I need to secure then with some brass cleats or posts. My next Job. Also attached the windscreen not as much trouble as I thought. Radio is in and the Torpedo 850 motor installed.
yep that's the one I was looking at !!!! still undecided if it really work £18 but I wanted to see what you get again. So I could price single items up or just scratch build the easy bits and just but the white metal castings. Many thanks again all.
Hello hopefully someone can help. Whilst browsing I happen to come across a boat fittings kit especially for the Fairy huntsman 34". I do remember it consisted of various plastic parts and was a bit on the pricey side. However I cannot find again who supplied the kit, has anyone else come across it. it was on a site following what other people bought as well as purchasing the Huntsman kit its self.
Thanks for the info upon finding the plans in a tube, I came across some old colour slides of the finished model at Pontin's model makers festival. This was me aged 5 so some 40 years ago and I guess the hull in the background became ours. Undecided if it will even fit in the car alone being able to get it in the water if I finish it after the huntsman.
Another boat my Dad started. A large fibre glass hull of the tug 'Cervia'. I would be interested if anyone has any information about the hull producer. I know it was purchased from Pontins model makers festival, Brean Sands from back in the day more than 35 years ago. It was to be petrol/ electric and he spend 9 years making a 4 cylinder 4 stroke 'Sealion' engine from scratch to power it, along with some windscreen motors from a Land rover. I've attached some pictures and work could continue if I find the will, after the huntsman is complete.
Hello all, been making great progress paint wise, and fitting out the huntsman. A popular DIY store paint came out the exact colour (Oxford Blue) I was look for. Radio control and motor mount nearly done just need to decide on the battery and wait for a nice day.
Some good progress made the weekend with a paint brush and the motor mount started, some holes for the motor to breath and the end plate machining now required. Also some details added to the top whilst other items were drying.
Thanks for the detailed reply however I missed your post and had bit the bullet and ordered the 850 motor. I decided to get the lipo safe 50A ESC, and first impression it's a beast of a motor. Maybe phase 2 will be a brushless setup at a later stage. Im hoping a lipo pack will save enough weight to give it some of the offshore PB performance it details in the instructions. :-)