super tigre g-34 ringed cl engine

[Wayne Collier]

I've been considering a super tigre G-34 ringed, dual ball bearing, control line engine.  Does anyone know where these engines are actually manufactured?  I checked the super tigre web site but didn't find where the engines were made. What airframes might be appropriate for this engine? So far I've never broken out of 1/2a but occasionally something catches my eye and I start thinking about giving something bigger a try.

[fred krueger]

Wayne,

The backplate on mine has 'made in China' moulded in.

The G34H that Tower Hobbies in selling is basically a helicopter engine with a venturi instead of a carb.  Checking the spare parts list on the Tower website reveals that the crankcase is no longer available.  To me that indicates the engine is no longer in production (maybe I'm wrong). 

Being basically a heli engine, it is timed rather high and wants to run FAST.  That's my experience.  I disassembled the engine and blocked the boost bypass with JB Weld.  BTW, the boost volume on this engine is about equal to the combined volume of the 2 Schnuerle ports.  This calmed the engine and I was able to get a very nice, fast 4-stroke setting with a 10x4 prop while mounted side-winder on a P-Force.  The fuel consumptions was around 4 oz. for the pattern.  Mounted inverted (Nobler), I was unable to get a good run as I couldn't shim the tank enough to correct upright/inverted run differences.

Stock, this engine seems happy at 16K to 17K rpm.  It might make a good slow combat engine.  The boost modification is a pain as the engine has to be heated to remove and re-install bearings and cylinder.

I don't recommend this engine for C/L.  If you're looking for a decent, cheap C/L engine try a OS40LAS or obtain a Magnum 36XLS and buy or make a venturi.  Magnums also disassembly easily for modification.

A modern .34 to .36 flies a Nobler size airplane with good authority.  It will probably fly a 40 size plane just fine.

Fred

[Bill Little]

Bob Gieseke was using a G-34 back when they came out in one of his Noblers.  I don't have a clue as to whether it was stock or............

[Wayne Collier]

Fred, thanks.  Thats just the kind of information I needed. 

[fred krueger]

Bill,

I do remember seeing a photo of Bob with the G34 powered Nobler.

Does anyone have information on the G-34 setup that Bob used?  It's possible that more than one G-34 variation existed.

Fred

[Bill Little]

Bill,

I do remember seeing a photo of Bob with the G34 powered Nobler.

Does anyone have information on the G-34 setup that Bob used?  It's possible that more than one G-34 variation existed.

Fred

Hi Fred,

I remember that he had the G-34 about the same time that Billy Werwage and Bob Hunt (along with others) were playing around with the OS 32F and simialr helicopter based engines in their Classic planes.  Bob went to a Webra 28 and then the 32 in his Lark. Those engines were retimed per Dean Pappas specs, IIRC.  There were a few others that ran the G-34.  Maybe Brad Walker or one of the Moon Brothers here know about Mr. Gieseke's engine. (??)

Basically, those guys quit with all those engines when the Aero Tiger 36 hit the street!

[dennis lipsett]

Wayne,

The backplate on mine has 'made in China' moulded in.

The G34H that Tower Hobbies in selling is basically a helicopter engine with a venturi instead of a carb.  Checking the spare parts list on the Tower website reveals that the crankcase is no longer available.  To me that indicates the engine is no longer in production (maybe I'm wrong). 

Being basically a heli engine, it is timed rather high and wants to run FAST.  That's my experience.  I disassembled the engine and blocked the boost bypass with JB Weld.  BTW, the boost volume on this engine is about equal to the combined volume of the 2 Schnuerle ports.  This calmed the engine and I was able to get a very nice, fast 4-stroke setting with a 10x4 prop while mounted side-winder on a P-Force.  The fuel consumptions was around 4 oz. for the pattern.  Mounted inverted (Nobler), I was unable to get a good run as I couldn't shim the tank enough to correct upright/inverted run differences.

Stock, this engine seems happy at 16K to 17K rpm.  It might make a good slow combat engine.  The boost modification is a pain as the engine has to be heated to remove and re-install bearings and cylinder.

I don't recommend this engine for C/L.  If you're looking for a decent, cheap C/L engine try a OS40LAS or obtain a Magnum 36XLS and buy or make a venturi.  Magnums also disassembly easily for modification.

A modern .34 to .36 flies a Nobler size airplane with good authority.  It will probably fly a 40 size plane just fine.

Fred

Fred, Sorry to be contrary but, the current ST34 is not the helicopter version of this motor. The heli was an ABC set up and the sport motor was ringed. Timing was slightly different also on the heli version, it was hotter.
The heli version was liked by some of the carrier people. I had one in a heli but it really didn't impress me.
I bought one just because they are reasonable  in cost and I think that I'll use it in an old old vintage combat planes, simply for the fact that it's reasonably priced and I won't go ouch if it bites the dust.
Dennis