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>> Home > Tags > power unit

power unit
jet unit
smoke unit
battery power
coningsby tower
gas power
portland model power boat association
power block
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power source
power supply
power unit
Voltage step down by Novagsi0 Commander   Posted: 6 days ago
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.

Electronics Down Below (5) by NPJ Captain   Posted: 6 days ago
This time I will try to remember to put in the ‘source’ information on the bits and pieces I use........... In the most recent piece I should have included exciters/transducers are Dayton Audio DAEX 25VT -4, 4 Ohms – 20 Watt pair, obtained from Sound Imports Netherlands and very quickly as well. The sound unit is a Mtroniks Digisound 5M diesel sound, available all over the place. Now to look at where I am at. Exciters are in place as high up the Hull as possible, but remembering the Deck level. Used the adhesive pads as supplied after wiping that part of the Hull with Meths and Silicone adhesive to keep in place as well as using the wiring tidies from Modelsport Ltd., for the cabling. (Pic 1+2) Before I start the motor and controller wiring I changed the platform ‘up front’ (pic3) with a piece of thin ply which I have given a couple of coats of varnish to waterproof. Then I thought to myself “why am I waterproofing this when, if it gets that wet, it will have gone to the bottom and be useless anyway”! (Pics 4) However, the platform gives a little more choice in terms of layout of other components and my plan for them is not really settled yet. I am concerned about the stern and possible swamping, but it currently seems the best place for the upgraded battery. (Pic5 ) Whilst talking batteries, I have gone for a separate battery supply for the receiver and hope to use the Bec supply for running other less critical items. Also the fitting of the battery in the stern bay drew my attention to the rudder servo for a couple of reasons. First is I am still considering increasing the size of the rudders and I am assuming that will increase the strain on the servo. The servo supplied is a standard issue and not water resistant so I have gone for an upgrade as shown(Pic6) That gives torque increase of 17Kg/cm over the Hobby Engine S1040C and has metal gears, metal control arm and waterproof for 20grams extra weight. Second is the closeness to the new battery position. So I was going to alter the servo arm setup anyway and the new metal arm suits this well. Maybe my ‘tutors’ will consider all this to be a little ‘over the top’ but I do so enjoy messing......................... New Servo DS 3218 by AYANI from Amazon. (Pics 6/7 ) Following that distraction, back to the front end and the Motor/Mixer placing and wiring. Now a little time ago I drew a plan to see what could go where and it came out that most of the ‘bits’ would go in the front bay with motors to be wired once power was brought forward, followed by the Esc/Mixer. (Pic 8) At that time I bought a P94 dual esc/mixer from Action Electronics and got the 20 amp version to be on the safe side................. My ‘guardians’ did point out this was ‘over-kill’ but I had already got it. Now, when placing the unit on the mounting board I found that the heatsinks made it too high to fit in the Hull! So being a spoilt brat only child I ordered the 10 amp version and as usual it came very quickly from up here in Bangor. ( Will keep the other one for the next project............Happy Hunter??) Unboxed it and it looked just the same, heatsinks and all. (Pic 9/10 ) So at that moment there was a bit of a set-back so I rang Component Shop at Bangor, they said “take the heat sinks off and you have a P94 lite”! Such a simple answer and such a nice chap. (Pic 11 ) Now a quick 'measure up' before I have a glass of wine (Pic 12) and does it all fit...? Well it appears to at the moment! (Pic 13) Next time really going to screw down the components under the forward hatch and wire it up. NPJ

Veron Vosper RTTL 28" by surfacesub Seaman   Posted: 10 days ago
How refreshing to read this thread. I built this kit in 1959/60 and from memory powered by a 1.5 c.c. E.D. diesel. Radio control I used a Reptone single channel unit for the rudder only. We had always had some sort of family boat on the river and not being able to be on board the RTTL was very frustrating for me. Sadly I sold the model as my training/career took hold. To this day I wonder if she has survived the test of time. She had a unique (highly illegal) ID number 2945. If any model boat enthusiast stumbles over my motley attempt at this Veron kit I would be very interested to hear? Good luck Skydive130 and enjoy the building experience!

Sound System Try Out by NPJ Captain   Posted: 14 days ago
Well, back now from a wet Scottish break and with lots of little parcels to open..... Just before I left I tried to load a video and failed. My 'tutors' are going to help me with that but for now, the photos will do the job. The first image shows my temporary power setup and the layout of the components (1). Exciters sourced from ............. and the sound unit is a ............. Note the way they are wired up. I hope, when fitted properly, the cabling will run across the bottom of the Hull. The positioning was very much dictated by the space available between one set of 'ribs' (2). This seems to be just perfect. Note the position of the solder tags(3). There is little space left at the top when fitting the Deck, so keep as high as possible bearing that in mind. So I put the exciters in place, and attached my power supply (4). I could not wait to put the Deck back on before I tried, but at least I had sound of Motors and Horn and adjusted the volume control to 75% (5) Volume control being the white block with the cross head. So after I had my fun, I tidied it all up and put the deck on. Not screwed down but just to check sound levels. Did not work first time because of the lose wires, but second time was good and a great depth of sound. So that has confirmed the sound system fits and can work in that position. However, that is without motors running and that may make a difference. Next time I hope to be doing the trials of the mixer/escapes and motors, then I will see how the sound presents with motors running. All the best. NPJ

Bridge detail by RNinMunich Fleet Admiral!   Posted: 21 days ago
Hi Norm, yep that's the idea. 👍 I believe though that the verticals should be at least twice the length of the horizontals. There would also have been a small round box at the centre where the connections were made. Feeder cable runs down the inside of one of the mast uprights. I think I found the pic that you referred to, see pic #1. It shows Lusty as in March 1947. Pic #2 shows her early in the war without this 'box'! Interesting is that the 1947 pic also shows an outrigger on the mast and what looks like a so called 'strossed' antenna. This was a version of the vertical antenna where the antenna wire was extended back down over the outrigger to increase the effective length in an attempt to improve the matching to the 50Ohm output of the TX RF power amplifier. Was not very successful and soon disappeared when robust whip and rod antennas with automatic tuning units were developed.😉 I leave it to you to decide which era and equipment you want to depict. Cheers Doug.

Hobby Engine 'Richardson' Tug Upgrade by RNinMunich Fleet Admiral!   Posted: 1 month ago
Yep, a Large scale IC doing most of the work, RX/Decoder, and some power transistors for the outputs. Not easily mod-able 😡 Suggest you have a look at the little switch boards from Action (Component Shop) Neil. http://www.componentshop.co.uk/action-electronics/switches.h... I made my own several years ago using CMOS chips and little 5V relays, but then I'm just like that😉 The Motor Sound Unit I understand looks after itself as it's coupled into the ESC control. So you just need switch boards for lights (nav and deck/cabin lights), smoke, other sound boards, e.g foghorn and/or ship's bell from Action? Have fun, Doug

Layout and Limitations (con) by NPJ Captain   Posted: 1 month ago
Hello folks. Exciters not wired yet. I cannot see any markings on them to indicate which way to do it. RN is coming to my aid............ Battery fits there OK and for getting in and out, but may be a little heavy. The Boat in the bath does not show the waterline than well. Yes I do hope to have the Radar rotating and such a power units should be on its way. Re circuit board, I will look at that with your prompts in my hand and see how I fair. As you indicate, I would like to retain such as the present lighting, but do away with the receiver part. Cheers NPJ

Chesapeak Bay Maritime Museum by pugwash1 Seaman   Posted: 2 months ago
This is way more than just a maritime museum. The location in the heart the Chesapeak Bay Area, the home of the only sail ” fishing fleet in the U.S.A. No power drives at all with the exception of small ”pusher” units, kind of tiny, with room for a motor only! These are used to aid in getting to the fishery. The traditional boat is a Skipjack and the museum is a living boat yard. So even when there is no events there is always something to see. Model boat days are held around a large square tempary pool. One day is for scale and live steam, and another is free sail and model skipjack racing. We do not have control of the weather but I can not remember anything but sun on the days I have been there👍. The team at the museum are a great group of ladies and gentlemen who are passionate in their love of the sea and on model days you will find loads of helpful tips etc from all the “captains”. If you are visitors on holiday, Anapolis is no more than three quarters of an hour away, this is the home of the Rodgers collection of dockyard models and the worlds largest collection of French prisoner of war bone models (napolionic) in the world, it is a super nautical town! the Chesapeake museum is in St.Michaels, with lots of super shopping for the non model boating spouses. Further up the road on Tilghman island is a fantastic nautical book store who specializes in model ships and boats. However you need to visit the book store a day before the show day as everyone will be looking for that rare and special book!!!!! Hope this is a help.

Hobby Engine Richardson Upgrade by octman Captain   Posted: 2 months ago
I have an old Southampton , off E.Bay a couple of years ago. I fitted the Components shop mixer, 2x 3400mAH NiMh packs(one for each motor)2 Mtroniks 15A Marine vipers, Technobots diesel sound system and also a Technobots 16 channel sound system. There is not a lot of spare space! I had a problem with the mixer eventually. It worked very well, as I did not think the turning circle in the original form was very good. I took it out eventually and went over to tank steering, which is OK but seems to be more effective in turning one way rather than the other, it's fine in a straight line. I found out after I had removed the mixer that the supposed problem was of my own making. So many wires inside that I was not in fact charging one of the battery packs so it ended up flat. Nothing wrong with the mixer at all! I mounted the engine sound speaker in the lower half of the cabin,where there was just enough room, where the window openings are not glazed(at least on my boat they aren't). Sound was OK but it was a bit lacking in volume, but I may need a higher power speaker, not sure as audio is a non area to me. The 16 channel unit is good in that a micro SD card is supplied with pre- recorded sounds, and instructions are given on how to record your own. The difficulty with this particular sound system is finding somewhere to put the second speaker as the 2 systems cannot be fed into the same speaker. It was a bit faint to say the least,possibly due to the tiny speaker I used. I tried to fit a transducer glued to the underside of the deck but there was no improvement so that is a work in progress. The inside of the hull resembled a very untidy birds nest! CHris

Red Cat hydroplane by SimpleSailor Sub-Lieutenant   Posted: 2 months ago
Hi. It is a scale model of a Formulaboats.com sponsord jet turbine powered hydroplane. I think this livery was from 2009. They can be seen racing on Youtube https://www.youtube.com/watch?v=A4HPB4PtT0k .As for the burning out motors that is sorted. Nothing to do with my cooling system but the unit I had from Hobby King seems to have a number of complaints about them burning out. So replaced it with a different model. HK have been very good and replaced all 3 failures. I will keep the latest replacement for another boat.

Seabreacher by canabus Admiral   Posted: 3 months ago
Hi Steve The Graupner Speed 900BB Torque specs are 6-40 volts, 6,500 rpm, 54A amps, shaft 6mm, dia. 51.5 mm, length 95mm and weight 645 grams. A brushless motor like the Hobbyking L5055 600kv is 11.1- 22.5 volts(3S -6S) power 1500watts, 55 Amps, shaft 6mm, dia. 50mm, length 55mm and weight 311 grams. On 3S=6660 rpm, 4S=8880 rpm and 6S=13500 rpm. The brushless motors are far more powerful and with an ESC with handles up to 6S(22.5 volts) you would have rpm's to drive a water jet unit. Canabus

Seabreacher by rolfman2000 Admiral   Posted: 3 months ago
I think I would be tempted to go brushless with it. Far more power for the size of motor. I don't think an 800 brushed motor would have the revs to push much water through a 50mm jet unit. Even an 850 motor would be an improvement. But going brushless, you could get far more revs out of it. Best of luck with your endeavours, Dave W 😀

ESC POWER by Dave M Fleet Admiral!   Posted: 4 months ago
Glad to hear you have solved your problem. Overrunning any system will result in some interesting issues and you are fortunate that yours shut down or failed open circuit otherwise all the electronics could have cooked. If you are getting a separate on-board power source the best option is to go for a switched mode supply, most will give you lots of amps without the heat problems of an ESC and are designed to work with higher battery voltages. You must disconnect any +ve power lead from any ESC to your rx. If your ESC has an on/off switch do make sure it is switched on, preferable before you power up the switched mode unit. Be good to see some pics or on water video Dave

ESC POWER by Dave M Fleet Admiral!   Posted: 4 months ago
Hi RHBaker What kind of ESCs are you using? Doug I would not use both BEC units even with your diode in place. Most manufacturers advise disconnecting one positive lead completely. Also if the ESC has a switch both ESCs must be switched on as I have damaged one of mine because it was switched off but still appeared to work. Result was similar to RH Bakers problem. I suspect the Mosfet gate voltage was exceeded without the internal power to the ESC, causing it to go permanently on. I also believe this may have been developed over time as I am sure this instance was not the first. The ESC still worked OK in reverse but went full on as soon as the stick on the tx was put forward. Further checking also revealed the internal BEC was dead. Sealed unit so no chance to repair. Both As Doug says a separate power supply is a better option if you have room, and modern switched mode supplies are freely available and will deliver much greater power for all your servos, lights etc Dave

Smoke Generator (Water Vapour type) by andyhynes Chief Petty Officer   Posted: 5 months ago
I recently required a smoke generator (ultrasonic Type) it is not in working order but I have rigged it up to test and bypassed the circuit board powered by 2 X 12 volt batteries and managed to get the vapourising unit to function, and the 12 volt fan motor with a separate supply to also work. With some work to replace the 12v to 24v converter CN6009 it should satisfactory. This unit appears to be a DIY job but very similar to MMB Foggy Smoke Generator which is available. Note the component required CN6009 I have sourced on ebay. Soon as it arrives I will set it up and test its suitability for a 1/24 scale TID tug boat model I am building. Problem might be size of smoke generator and other components required to fit in the hull in addition to a 12 volt 9ah battery scooter battery, there aint much space. There are smaller smoke generators available which burn oil (fan powered) which I have in one of my other models (Blazer Tug Boat) which is OK with no wind and close up but at any distance hard to detect if any smoke is being produced. The Oil recommend for this unit is Baby Oil which smells OK but I have wondered if I could use another oil based fluid which would produce more smoke (Any suggestions)?