Scale RR V-12 for P-51 Mustang - RC Groups
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Feb 01, 2009, 11:23 PM
Registered User

Scale RR V-12 for P-51 Mustang

Hi everyone!

I just wanted to get on here and get some feedback from all of the giant scalers.

I own and operate a very sophisticated CNC machine shop. I have been toying with the notion over the past few years of building a scaled down version of the Rolls Royce Merlin V-12 used in the p-51 Mustangs. This model engine would be the most complex of its kind. Of course it would be a V-12, but would also be liquid cooled and supercharged. Personally there is nothing that ticks me off more than heaing a weed wacker motor in a giant scale P-51. It just isn't right, but hey...everyone works with what they have. The plans are in the design stages right now with prototyping to be underway soon. One design offers a 48 valve overhead cam to get as realistic as possible. The entire block will be machined from billit material and will use glow fuel.

My question is....Is this something of intrest to the general public?

Feel free to email me.

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Feb 02, 2009, 01:08 AM
Vintage Flyer
It was at least several yaers ago I read an article on a guy who built a large scale P-51 with a scale V-12 Merlin in it
Feb 02, 2009, 11:09 AM
My Lipo is Bigger than Yours!
gjmjoe017's Avatar
I think it's a great idea!All Mustang lovers would love to see something like this,as far as interest in the general RC population being in the market for one,I'm sure the cost would be very restrictive.Hope to see it!
Feb 02, 2009, 07:32 PM
Registered User
I suppose it would not be for the faint of heart or wallet for that matter. I would rather build somthing that is affordable. But what is? Robart charges $4000 for their radial and the jet people are in the neighborhood of 2-3k. What P-51 model is out there that would handle a 8-12 pound engine that is roughly 8 inches long by 5 inches wide?

Feb 02, 2009, 11:24 PM
Scale Builder

A few years back I spoke with a gentleman who had a 1/4 scale Merlin and wanted a Mustang airframe constructed for the engine. The problem we ran into was that the engine was too heavy and did not have the power to adequately fly a 1/4 scale Mustang. I have no idea if that was just his particular engine design or if that would be indicative of any such undertaking. Not sure if they are still available but there used to be a company which offered castings for a scaled down Merlin, though I do not recall what scale. Interesting idea which would result in a truly unique project. Good luck with it if you decide to move forward.

Chad Veich
Feb 03, 2009, 01:09 AM
Vintage Flyer
There was one at the Toledo Ohio Expo some time back. This guy also had a scale Harley engine, and a scale Ford 427 V8 he built an RC dragster for.
Dec 23, 2009, 12:26 AM
Registered User
Hi Matt.

I think that if you're able to make an engine that will the have the power and weight to adequately fly a 1/4 scale Mustang several people will be interested in buying. Not just here but in Europe too.
I'm from Fl and I've seen people expending more than 20K on their Jets airplanes. A single turbine cost about $2500.00
People are buying twin cylinders in-line engines like the ZDZ's and 3W's for the CompArf P-51 kit and price is about $2000.00.

Take a look on this site for the 3W-110iR2
Weight: 7.69 lbs incl. ignition
Power: 10,5 HP; 7.83kW

Also take a look on this site:

They made a merlin Kit, not sure of it's weight or power but you could get a better picture.

I'm actually building a 1/4 scale mustang and would buy a scale engine if available.


Mar 06, 2010, 09:11 PM
Registered User

P 51 Engine

I would surely want such an engine for my 1/4 scale P51! There's someone at who has made the castings. From what it looks like all they need would be a high tech machining operation and we could have a good engine...... If jets are going for $4000 there should be enough market for this too and margin....
Mar 17, 2010, 12:13 AM
Aircrafting is noisey...what?!
charlieoneseven's Avatar
Yeah the DIY on that dynamotive would be over my head.
Supercharged, liquid cooled, gear reduction too?
Mar 17, 2010, 12:09 PM
Registered User
N99JH's Avatar

1/4 Scale Merlin

It will depend to a large degree on the cost. I think that $4000 target price will make quite a few of these sell. Question is: Can you make them for such selling price. I for once am looking at buying a Robart's radial in the near future - primarily because it is (almost) a scale model of the Jacobs R-755. Bear in mind that most people will probably buy them to fondle - not neccessarily to fly. The good thing is that this kind of engines end up being collectors item and rarely loose value over time unless actually flown.
Mar 18, 2010, 10:39 PM
Aircrafting is noisey...what?!
charlieoneseven's Avatar
They only lose value if you play lawn dart with them.

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