Engine for a Veco Mustang ?

[Dennis Leonhardi]

Let's hear it, what's a good choice from among the "modern" engines?  Remember, this is only 408 square inches of wing, and a thin airfoil at that ...


Dennis

[Bill Little]

Hi Dennis,

I suggest an OS .25LA.

Bill

[Dennis Leonhardi]

Thanks Bill!

I know that Mustang is special to you, as it is to me.  Nearly 50 years ago, my friend and mentor "wowed" us kids in my home town with his, powered by a K&B Green Head .35.  The flap horn failed on his sometime in the '60s, but he managed to get the airplane down in one piece.  It's been a hanger queen since, but he did say recently he's opened it up and will attempt repair.


Dennis

[Bill Little]

Hi Dennis,

I had one myself around 1964.  Used my one and only (at the time) Fox .35 Stunt in it.  The Veco recommendation was a Veco .29.

Bill

[Hoss Cain]

Let's hear it, what's a good choice from among the "modern" engines?  Remember, this is only 408 square inches of wing, and a thin airfoil at that ...
Dennis

Not much into the so called "modern engines" but was an avid CL Stunt Flier in those days of the Veco kits. The Veco Mustang was a sport airplane, a look-alike take of the F-51H (still P-51 in most thoughts) capable of sport stunting but far from what I determined was anywhere near competition level. It simply lacked the wing area for its weight.

As for a good engine the Fox29-35, Veco 29-35, Super-Tigre 29-40, or such could well provide for a good sport-flying model. OS-29-35 plain bearing, or similar Brodak engine should also be a good selection.

If you need an engine of the high-priced spread to be fashionable, well that is beyond me.  

[Tom Niebuhr]

Bob Hunt won the first OTS contest  (1970) with a Veco Mustang. He had a Gold, anniversary Fox .35 in the airplane. Many of us, including Bob Gieseke, feel that was the best run of Fox 35s.
Performance wise, the Veco Mustang is an OTS airplane.

[Geoff Goodworth]

Back to the original question, a 42" Shoestring is 395 sq in and mine weigh in at about 28–29 oz. AN FP 20 flies them with plenty of authority.

Based on the wing area, FP 20, FP 25, LA 25. They all fit the same mounting.

[Martin Quartim]

The Enya SS30 is much stronger and lighter then all the OS FP/LA 20 and 25. The Enya SS30 is very friendly and needs no magic setup, it will work with just about any prop from 9" to 10.5" diameter and 4" to 6" in pitch. I like ultra mega power, so I put a bigger 7.0mm Venturi and used an APC 10.5x4.5 with this engine on my Ringmaster. The needle range you will be able to use to set the speed to fly and the speed control will amaze you.

I have not used these but there is the Enya SS25 AAC that is even lighter and the SS35 that has 2BBs and is just  bit heavier then SS30 but still lighter then a OS 25LA/FP

Talk to Randy Smith he sells Enya engines. It just doesn't get any better then buying an Enya with Randy's support.

Martin

[dankar]

Keep it USA, Fox .35 Stunt. Worked back when, will work now. 

[Dennis Adamisin]

My only caution is that while the wing area is small the fuselage is quite large.  The challenge is to build it very light (inculding using a light engine) and plan on it being fairly draggy.

[Bob Whitely]

Dennis is correct in that it is a draggy model. Do the best you can to keep it
light. I built one a couple of years ago and it is a pretty good old time model
but responds well to a lot of horsepower. I ended up with a Tigre .46 in mine
and that made quite a difference in performance. I'm a big believer in way too
much power as you can always back it down. If you don't skimp on power you
should be ok. Do make sure to seal the hingelines as the control surfaces are
marginal at best.  RJ

[Howard Rush]

I like ultra mega power, so I put a bigger 7.0mm Venturi and used an APC 10.5x4.5 with this engine on my Ringmaster.

It's a good Ringmaster.

[Martin Quartim]

In my experience making stiff, not tapered and square T.E. Flaps seems to works much better, specially in high wing loading models. My models are quite heavy, which is good in strong winds, but still can turn tight corners. I am firm believer that my planes fly as well as they do because how I built the flaps. In a low wing loading it may not make a significant difference as you will never get close to the critical angle of attack. But if any of you is suffering with stall, try replacing your flaps and sealing them of course.

If this model can handle the weight of an ST 46, then it opens the range of engine choices quite a bit.  For example there is the Enya 40XZ which I believe is the lightest and strongest in the 40 range with 9.8Oz with the stock muffler and 8.3Oz w/o muffler.

Here is a video of my Enya SS30 spinning an APC 10.5x4.5.  launch at 10300rpms which will give you an idea of its power:
 

The engine with the stock muffler weighs about 8.1Oz

Some people use the SS30 with a 10x6 prop, much quieter and in a 4.2.4 break mode. But in this setup it is less powerful and will wind up in windy days, not what you want if you compete. For flying in a regular day this is quite fine though.

Martin

Martin

[Martin Quartim]

Hi Howard,

yeah you sure can say that When you flew it here in Brazil it was a Good Ringmaster, but after fixing the warped wing, chaning tank and reducing the line length it is now a Very Good Ringmaster  . It actually kicks butt in extreme windy days. I kid you not I have taken it as a back up a few times and actually used once.

Cheers,

Martin