A good stunt engine ?

[BOB ALLAN]

Back in 1957, Duke Fox released a couple of new engines with 4 bolt backplates - one was / is the well known 35 Combat Special. The other one, now lost in obscurity, was the 35 R.C. Special, which was similar to the CS but with modified timing to enable it to turn big props by increasing torque at low revs.  According to the Engine Test in MAN Oct. 1958, the 35 R.C. Special ran out of breath at 12,500 RPM, and was fitted with a special head for low speed running. Was there enough difference in the two engines to make the Fox 35 R.C. Special a candidate for stunt ? BOB

[BOB ALLAN]

Here is a photo of the engine in question. On paper at least, it should have made a reasonable stunt engine.

[Randy Ryan]

Well Bob, there's one way to find out, try it. I remember this engine but I never had one.

[EddyR]

Bob I have had several of that model. Some had the combat sleeve in them and some had the standard Fox stunt sleeve in them. They ran just like a standard Fox 35 stunt
Ed

[john e. holliday]

Looks like the series of Fox Rockets.  Remember to break it in properly.   

[George]

Here is a photo of the engine in question. On paper at least, it should have made a reasonable stunt engine.

Bob,
That was a time when a "throttle" was usually accomplished by a two needle setup or an exhaust baffle. I see yours has both.

If you use it for CL, you will have to get used to choking by using three fingers over the intake... or use something like JB Weld in the extra holes.

George

Edit: Oops! On second look, I see that the upper holes in the intake are not fully drilled. Sorry, my bad.

[Dick Pacini]

That exhaust clapper doesn't even look like it will fit.

[BOB ALLAN]

Dick, I hadn't planned on using the exhaust thingy,but here's a photo of it on the engine as well as a look down the venturi with 1/4 inch insert.

[BOB ALLAN]

Take two!

[Dick Pacini]

I was fooled by the lack of visible tapped holes for the clapper to attach to the exhaust stack.  Apparently, they are inside and not visible in the first pic.

[Bill Mohrbacher]

Here's the ad for those engines.  Although they advertised a 25, 29, and 59, all anyone's every seen are the 19 and 35.  Also, the venturi clapper shown in the artwork was added by many flyers, but not sold from the factory.

[john e. holliday]

I remember my first throttle controlled Fox .35 or 36.  It had a carb linked to a slie in the exhaust stack.  It slid up and down vertically.  First contest was El Dorado KANSAS at a circle down town park.  It had enough power to get off the deck.  But when slowed down there was only about 25 mph differece.  Still  wish I had it as it would be a collectors item now.  I think I had the only one in the KC area.