Hi guys,

Apologies for bringing you forum into disrepute by mentioning fixed-wings but I was wondering if anyone could give me some advice please ?

I was wondering about the suitablilty of using a Webra Speed 52 AAR heli engine in an airplane. And also any idea what I should look for when buying one of these engine second-hand as I don't know if it'd be worked differently in a heli ?

http://www.adis.at/webra/1025/1025hx.htm



Very many thanks in advance !

B.D.

I *had* a Webra .32 which I sold to a clubmate; he used it on his Sig Kougar (or Kobra - I get those two confused.)

Apart from locating an airplane-style muffler, a prop washer and shimming the plug up (he runs 15% fuel) the engine ran just fine.

Hi Visioneer,

Thanks for that. I didn't know if the .52 AAR had any heli-only perculiarities which would mean it was unsuitable for aero use.

I'll see if anyone else replies.

Cheers !

B.D.

generally, its using an airplane engine in a heli that causes the most problems.

Normally this is attributed to the smaller head heat sinks on the airplane engines, causing them to overheat in helis.

as visioneer1 says, once you get over the physical boundaries (size,muffler,plug,prop washer etc) there are really no other problems, except for the frustration of modifying this and that to get it installed.

I seem to remember another thing, but cant say for sure.... wasn't there a problem with helicopter and aircraft engine interchangeability due to heli engines are orientated horizontally while aircraft engines are orientated vertically? someone here may remember...........Im talking years ago.

The main drawback with a Heli engine in a plane is that a heli engine normaly has a shorter outer part of the crankshaft and no prop driver washer. The short crankshaft makes it difficult to put on a prop, spinner, washer and propnut, the threads wont be long enough.