converting italeri 1/35 schnellboot s-100 to r/c

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converting italeri 1/35 schnellboot s-100 to r/c

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21 April 2009 at 02:02 #20348
BUZZER
Participant
@buzzer
can any one tell me what size motors and props should i use. loads of room to do it rudders could be tricky. looking to have 3 motors and 3 rudders all run by 2 channel radto.can any one help me.Paul [mr editor] if you read this can you tell me when it will be featured in the mag please.
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21 April 2009 at 02:02 #8344
BUZZER
Participant
@buzzer
at wits end feel so useless
21 April 2009 at 07:02 #20351
ashley needham
Participant
@ashleyneedham69188
Buz. I think this of sufficient size for a trio of speed 400`s, but perhaps a set of speed 280, or speed 280 race from Graupner might be a good fit, they are indeed feisty littly units and spin a 25mm prop with gusto…I am guessing the props on the schnell wont be any larger? As for rudders, i think that an increase in size over the kit ones is definitely warranted, i have seen similar pt boat conversions and the scale size rudders have been far too small on the pond (my experience)for good for manouverability. And after all you can always make them a bit smaller later on. Ashley
22 April 2009 at 01:05 #20373
BUZZER
Participant
@buzzer
cheers ash. i have just started building the boat so have got a bit of time to get some ideas also how big and long propshafts do i need? there must be someone out there building one.
22 April 2009 at 06:57 #20375
ashley needham
Participant
@ashleyneedham69188
Buz. Shaft length depends on where you put the motors, the boat will be very light, so I might suggest test floating the hull with some motors, gear and battery in to see where the stuff should go for correct weight distribution, also bearing in mind the access arrangements, ie what hatches you will have to get to the stuff. Access is required for motor/coupling and rudder fiddling, but the receiver and battery can be slid into place somewhere. 4mm shafts may be a bit heavy for the boat so 3mm or even 2mm shafts might be needed, and I recon 3x Graupner speed 280 race motors and 3x 25mm brass props would provide adequate go, or speed 400s .depends on the weight, speed 280s are very much smaller than speed 400`s. Must be someone out there who has converted one by now??
4 May 2009 at 09:40 #20624
Paul Millers 1
Participant
@paulmillers1
Buzzer, There are shed loads of information on this build on the Model Boat Mayhem forum, with lots of pictures and links, some of them to sites outside the UK and not in English but the pictures are very good. I’m trawling through them all at the moment before starting my own build.
12 May 2009 at 15:50 #20806
ashley needham
Participant
@ashleyneedham69188
Buz, there is a man on our pond wot is building an E-boot, and I am not sure if it is the plastic one, it is about the right size, but he has some tiny brushless motors (2) in it and some equally tiny props and, boy, does it go! does it make a very high pitched screaming sound as it takes off? does it look more like a hydro than a torpedo boat?? does it strip the blades off props very easily if it encounters an underwater object and then steer only in circles??? yes to all these. He has 2mm shafts and so is having to get some brass props made. The lesson to be learned here?? its fast, oh yes, very fast. Go brushless.Ashley
14 May 2009 at 12:34 #20859
Paul Freshney
Participant
@paulfreshney24971
Hi

SHG Model Supplies can supply a bespoke set of shafts/motors/props etc. specifically for converting this kit. Dave Abbott is using them in his ‘Plastic Magic’ kit review that should appear in MB later in 2009, and a member of my club has purchased the same and they look fine to me.
25 June 2009 at 11:59 #21658
Andy Hustler
Participant
@andyhustler32076
Hi Buzz i’m building the italeri PT Boat and using 3 x graupner 400’s on to 2mm shafts with 3 x 20mm brass props and using a Viper Marine 40 speed controler .The shafts i picked up from antics for about 2 quid each and they already had plastic props on them but were to big .The shafts are the ideal size for the boat but i have had to open up the openings in the hull slghtly to accomodate the tubes.

I have kept the original rudders and have used some tubing,again from antics, that fit snug over the original rudder ends and the other a fraction larger to slip over it with perhaps a drop of oil or gease to waterproof /ease the turning circle.

The review by Dave Abbot is fantastic and well worth reading.If you cant get hold of the issue give me a shout and i will photcopy the relavent article for you.I’m sure Paul wont mind me doing this .

Good luck and let me know how you get on as this boat will be my next project ,Also i dont know if you know that Italeria make a crew for this boat .

Happy boating ,Andy from Cardiff
25 June 2009 at 19:29 #21668
Paul Millers 1
Participant
@paulmillers1
I’m putting mine on hold until all the photo etch parts are available.
28 June 2009 at 06:52 #21695
the converter
Participant
@theconverter
hi i have just finished my conversion i used 3 mfa 280 motors on to 3mm shafts with 3 35mm props being run off 40amp mtronics.i increased the size of the two outer rudders to the same size of the centre rudder and discovered this does give better handling at speed.also extra ballast needs to be added to get this boat to sit in the water as it should and not plane when at full throttle, mine is now at a total weight of 2.7kilos and was working a treat until it threw a prop so now have some repairs to make but nothing serious.the crew are now available (got mine yesterday and are very detailed figures) .
detail up kits are also available but not from italia as yet ,as usual there dragging there heals releasing all the extras, just google “detail up kits for schnellboot s100 and you will find the other companys that offer these kits now if you don’t mind them coming from the usa.

regards

have uploaded some pics into my album now will post more soon

please feel free to pm me if you have any questions or looking for advice on this conversion

Edited By the converter on 28/06/2009 07:08:38
29 June 2009 at 21:42 #21729
Kevin Bellman
Participant
@kevinbellman86047
Hi Converter

How have you arranged access into the boat?

Looking forward to seeing more pics
1 July 2009 at 16:06 #21773
Francis Macnaughton
Participant
@francismacnaughton39461
Has anyone installed the SHG shafts into the 1/35th S Boote? I got a set but they seem awfully short and probably only just get to the inside of the hull. What is connected to the shaft end – a long coupling or an extension shaft and how is the connection done?

Thanks for any info (SHG are closed for a stocktake this week so no answers from them)
3 July 2009 at 18:46 #21826
the converter
Participant
@theconverter
hi access in to the boat was failly simple once i had thought about it long and hard just few simple changes and a bit of filing i can now remove the whole of the top deck in two peices to give full access to the hull without risking damage to the deck.

francis not used SHG set myself but made my own useing 12″ lengths of copper tube and rod with a universal coupling to attach to the motors.and at this length had no problems with water leakage.

regards
3 July 2009 at 22:22 #21843
Francis Macnaughton
Participant
@francismacnaughton39461
The SHG shafts are only 7.5 or 8 inches long – hence my question!
4 July 2009 at 09:08 #21854
ashley needham
Participant
@ashleyneedham69188
Francis. These seem very short considering the converter used home made 12″ shafts””. You could use a double coupling to extend inside, OR make some new shafts out of brass rod. This is easy to thread, dies are very cheap… in theory they will not last as long as steel shafts but I think they would probably outlive the hull in practice.The converter also used mFA 280`s, which are RELATIVELY puny units , but if he is happy with his boat on the water then they are obviously doing the business. They are also very low drain and compared to the speed 400`s and I think you may have overkill with a small 20mm prop. A speed 400 will blast this around and you will have a lot of cavitation. speed 280`s may be better, and as they are smaller, they will fit closer together and nearer the shaft ends???? Ashley
4 July 2009 at 13:53 #21857
Francis Macnaughton
Participant
@francismacnaughton39461
Ashley, iIagree they are very short and no doubt all will be explained next week when SHG are back in touch but I had hoped in the meantime that there was someone reading this list that had the full conversion set and could explain the issue.

On the subject of motors and props, I was thinking of trying Speed 400s with epoxy resin copies of the kit props but SHG advised me that the steeper pitch that would overload the motors and were advocating Raboesch brass props instead. Anyone have experience in this area for this set-up?
4 July 2009 at 14:09 #21858
the converter
Participant
@theconverter
hi ash you are right about the 280 motors but together with three 35mm 3 bladed props it is very very fast and with out question not scale speed.i would’nt say i am 100% happy with the speed but with very few builders doing i full 3 motor /3 prop conversion and opting for the single motor/prop its all trial and error just keep testing and one day some one will get it right .i have tried the mfa 360 motors but the amount of noise and vibration going through the boat was to much .at present i am considering tyring gearing down the motors to see what affect this has at a ratio of 2:1
regards
5 July 2009 at 07:25 #21867
ashley needham
Participant
@ashleyneedham69188
Francis. I cant quite imagine a speed 400 being overloaded by a pitchy 20mm prop, but I bow to superior knowledge.

Converter, If you are running “standard” 280s on (what voltage?) and it is very fast I would leave it alone! or how aboutr simply reducing the main battery voltage? The 360`s should not be too noisy unless they are running at higher voltages (my experience). I would stick to the 3 shaft setup any day, as 95% of a boats life is on its stand out the water, and having only one prop would ruin the look of it, considering that this is a plastic kit and thus well detailed above decks. Ash
5 July 2009 at 13:32 #21874
Francis Macnaughton
Participant
@francismacnaughton39461
Ashley, actually the kit props are 35mm diameter but I am intending to experiment with using them anyway.

Convertor, thanks for the extra pictures you have now posted. What does “very very fast” look like or did you measure the actual speed?
5 July 2009 at 19:53 #21879
ashley needham
Participant
@ashleyneedham69188
35mm props are a fair size, and certainly suitable to load a 400 with, and I can see why SHG advises high-pitch props of that size would overload the motor. If you can run 12v then I rather like MFA 385 motors, they seem to spin up to 40mm props ok. I know others think that this size prop is too much for a 385 but they dontt get hot or anything, and the current draw is very light. Ashley
6 July 2009 at 12:45 #21892
BUZZER
Participant
@buzzer
francis and all.

i got the props, shafts, motors, couplings and rudders from SHG the order came with 3 photo’s of assembly done by DAVE ABBOTT and they answer your question about propshaft length.i am waiting untill his build is featured in MODEL BOATS (cant wait) it cant be long now. i still have loads to do until then.Converter your boat looks good well done im a novice so will wait for the profesional build. buzz buzz
6 July 2009 at 12:45 #21893
BUZZER
Participant
@buzzer
francis and all.

i got the props, shafts, motors, couplings and rudders from SHG the order came with 3 photo’s of assembly done by DAVE ABBOTT and they answer your question about propshaft length.i am waiting untill his build is featured in MODEL BOATS (cant wait) it cant be long now. i still have loads to do until then.Converter your boat looks good well done im a novice so will wait for the profesional build. buzz buzz
6 July 2009 at 18:45 #21897
the converter
Participant
@theconverter
hi buzzer thanks for your kind words almost got the ageing done now and the figures painted so will post one more pic when completed.
still looking at making changes with motors etc to get more of a scale speed and not like its running on nitro.

regards

ps have just received my next kit for conversion 1/350 uss enterprise so looking forward to this one.here’s to new challenges ahead.

Edited By the converter on 06/07/2009 18:52:54
6 July 2009 at 19:48 #21898
Francis Macnaughton
Participant
@francismacnaughton39461
Buzzer,

Thanks – SHG seem to have forgotten to include the pictures for me! Were your shafts the same length ie 7.5 and 8″ of non-threaded metal?
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