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Author Topic: 1/72nd Airfix.Revell Vosper conversion  (Read 507 times)

rnli12

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1/72nd Airfix.Revell Vosper conversion
« on: November 26, 2019, 07:39:08 PM »

Hi,
Anyone managed to convert a 1/72nd scale Vosper or Revell PT boat to rc?
Any recommendations for motors etc gratefully received.
Rich
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Regards,

Rich

warspite

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Re: 1/72nd Airfix.Revell Vosper conversion
« Reply #1 on: November 26, 2019, 08:05:09 PM »

Yep me, badly, deans marine have as well, excellently I must add and also the airfix lifeboat, to make it work the running gear has to be extremely light and turbo powered to be of any use i.e. deans sold the kit where the motor was through a increased ratio speed to the motor otherwise it wouldn't work very fast.


I have another kit and the PT boat 109 but as yet the patience to build or buy the motor set to do them, and a replacement S boat at 1/72
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Operational - 1/72 LCMIII, 1/180 Royal Sovereign
Non Operational - 1/72 Corvette, 1/72 E-Boat, 1/72 vosper mtb
incomplete, HMS Victory, tug, cardboard castle class convert, got the new job, looking again though

Stan

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Re: 1/72nd Airfix.Revell Vosper conversion
« Reply #2 on: November 26, 2019, 08:33:27 PM »

Not the easiest subject to convert may be more hassle than its worth.  But I wish you all the best and hope all goes well look forward to the pictures.

Stan.
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Allnightin

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Re: 1/72nd Airfix.Revell Vosper conversion
« Reply #3 on: November 27, 2019, 09:44:04 AM »

My conversion of the Airfix  Vosper was in the March 2017 Model Boats magazine.   I used the Deltang Rx60-3 DSM2/DSMX 2.4 GHz receiver with an integral bi-directional ESC plus a HK 1.7g micro servo and the motor was a Parkzone P-51 combined motor and gearbox for the necessary hardware and power comes from a 240 mAh 3.7V LiPo pack (all from Micron Radio Control).  This lot weighs a total of 17 grams and I doubt there are many ways of finding a lighter solution.   A single Deans Marine 3 blade  18mm plastic propeller was the other specialist component.   The model weighs about 20 grams more than the true scale equivalent and sits in the water about 4mm deeper at the stern when static but manages over 6 feet a second at top speed and looks like the full size original the plane.   If you ever attend the annual late June model show at Plymouth Guildhall, I usually bring it along and display on the Plymouth MBC stand.
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redpmg

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Re: 1/72nd Airfix.Revell Vosper conversion
« Reply #4 on: November 27, 2019, 05:02:45 PM »

The PT boat would be much easier as its larger. Try a stripped servo as a speed controller/motor combo with a lightweight receiver like the T5 one. Simon of Prop Shop makes beautiful small brass scale props which would be suitable. Thin 2mm prop-shafts like the ones from Graupner can be cut down to the correct size. Use a Lipo single cell first to save weight or go for a small 2 cell but be careful as you might burn out receiver and servo motor at 7.2v.
Alternatively find a broken mini helicopter and use that motor/gearbox with only on/off control via a mini servo (even less weight). Must be plenty around - I have 3 donated scrap ones and one of my own in working order....... 

All of those cheaper than the specialist items......
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Allnightin

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Re: 1/72nd Airfix.Revell Vosper conversion
« Reply #5 on: November 27, 2019, 08:45:11 PM »

I weighed the static Revell PT109 I built from the 1960s issue kit and it weighs 116 grams.  The recent new tool issue looks to be heavier, especially the late war version that has just been released.  The scale max displacement would be 153 grams allowing 37 grams for RC conversion so there is a better margin than the Vosper.   Whether it is practical to have the 3 shafts driving scale props and still get a reasonable performance is less likely I suspect but I would be interested to hear of any one who has managed.
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warspite

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Re: 1/72nd Airfix.Revell Vosper conversion
« Reply #6 on: November 27, 2019, 10:38:59 PM »

Again Deans did one using the same running gear, they showed all of the models including the S boat at Kirklees one year.
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Operational - 1/72 LCMIII, 1/180 Royal Sovereign
Non Operational - 1/72 Corvette, 1/72 E-Boat, 1/72 vosper mtb
incomplete, HMS Victory, tug, cardboard castle class convert, got the new job, looking again though

warspite

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Re: 1/72nd Airfix.Revell Vosper conversion
« Reply #7 on: November 27, 2019, 10:49:59 PM »


As I said, this is mine done badly, no speed, sits low in the water, ran only once or twice and then mothballed, the insides have probably rotted now.https://www.youtube.com/watch?v=l9Ei3X0A6Q0 (copy and paste, its the run 2 version - not the vastly faster one in a swimming pool - i wish)
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Operational - 1/72 LCMIII, 1/180 Royal Sovereign
Non Operational - 1/72 Corvette, 1/72 E-Boat, 1/72 vosper mtb
incomplete, HMS Victory, tug, cardboard castle class convert, got the new job, looking again though

redpmg

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Re: 1/72nd Airfix.Revell Vosper conversion
« Reply #8 on: November 28, 2019, 06:08:14 AM »

https://www.youtube.com/watch?v=Fc9jnkO5qag
try that view - gives all the details of the components used too
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rnli12

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Re: 1/72nd Airfix.Revell Vosper conversion
« Reply #9 on: November 28, 2019, 11:55:52 AM »

Thanks all, I think it will be a challenge!!
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Regards,

Rich

Dean's Marine

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Re: 1/72nd Airfix.Revell Vosper conversion
« Reply #10 on: November 28, 2019, 05:11:12 PM »

here is one of the deans marine vospers in actionhttps://www.youtube.com/watch?v=d3HcMGoYfQs
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