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Engine basics => Engine set up tips => Topic started by: Dave_Trible on May 20, 2014, 11:42:29 AM
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On one of my Ebay adventures I picked up this new Fox .36 sport/stunt/whatever for a good price. This engine seems to get a bad rap as a vibrater. The story is that Duke designed a failed combat motor but made up a bunch of parts ahead. He took those parts to cobble up this motor to save his bacon on the parts. Long story short I put the engine on the stand today and found it to start well, run very smooth and definitely has more pony that the stunt .35. If this is your bag I'd grab on to the next one you see on the bay.
Dave
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Also I might add, The piston and liner assembly is a drop in fit for the old 36, and 36X square venture engines.
Bigiron
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Story I heard was an effort to make rules for slow rat, slow combat, and profile carrier such that one airplane could be flown in all three event. Call was for a plain bearing engine and the Fox sport 36 was designed to meet these criteria. Dick Mathis designed the Mongoose to fit these rules. However, this set of rules never came to fruition. .
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Hi Jim, Marvin et. al.:
I talked to Duke about this engine and he said that it was indeed designed to be used in Slow Combat and Carrier where the engines were limited to plain bearings. Once again, the AMA screwed Duke with the rule changes!
In any case, I bought the Fox .36 aafter seeing Howard Rush's endorsement. How many of you remember Howards's " Tally Ho" ad from the early 70's?
I found the Fox .36 plain baring to be a great engine. It gave up nothing in power to the other engines of the time. I flew it in Slow Combat for awhile and had no complaints. I still have one with a new p&c waiting to be used.
I have been told that by adding an extra head gasket, this engine will become a very good stunt engine. I found that it produces much more power that the Fox .40 Stunt from the same time period. The Fox .40 was a large and heavy engine that did not do much for me but I have not tried to run it as a pure stunt engine. Here again I have been told that by adding an extea head gasket, the .40 becomes a great stunt engine. I hope so, as I have a couple in the attic! LOL. I talked to Duke about the .40 Stunt and he had no comments about my findings. The .40 Stunt is a novel engine with Duke's special porting with a flat top piston. I have one on a Magician that I have never flown. I have to put that on my bucket list!
Both the .36 and the .40 Stunt engines are starting to bring a fair price in E Bay. One warning though, spare parts for these engines may be difficult to find!
Remember, that these engines require a lot of Castor Oil!!!
Stay well,
Frank
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We're in the process of making a batch of 36X ABC piston/liner/rod/pin sets. I can confirm it's not a stunt timed engine, but it was never intended for that purpose, and my sets are not intended to make it a stunt engine.. We are replicating the same timing (although there were variations, who knows if it was due to quality control or otherwise).