I need to add some nose weight to my Super Skybolt Bipe. It recommends a 4 stroke .91- 1.20. I had a Saito .91 on it, but it is terribly tail heavy. I was wondering if there was a good gasser conversion that would be a nice match for this plane.

Hmm lots of views, but no comment...I assume that this is not possible realistically.

Try this site for starters.

http://www.rcshowcase.com/html/engines.html

I have no experience with them, but the displacements seem to be close to your needs.

With no other comments on your question, it is worth a look.

Perhaps soliciting comments on one or BOTH of the lower displacement engines will yield a greater input --------- in today's world of 'Models by the square yard' perhaps not too many can identify with an 8 to 9 pound bipe but they might if you posted an engine type.

I would put a homelite 33cc from a "bandit" chainsaw in the front end....if you like unlimited vert!! you can get this saw at homedepot for less than 115.00 there eazy to convert and their good motors. just my .02

tmproff
Share some weight data. You say you need more nose weight, what does your present engine weigh and how much more to balance?
Lots of options starting at about 21cc on up (Ryobis pull 13lb US120 thru the air) What type of performance do you want?
The holidays have slowed this forum done a bunch, be patient.

The plane is a GP Super Skybolt. I had a Saito .91 on it, and with the battery in the nose, it still needs almost a pound of lead in the nose. People say that this plane is tail heavy but that is an understatement. With the Saito .91 and everything in it, the plane comes out to about 8 lb 3 oz.

Reviewing data furnished on the RCS site, even the 140/22cc Gasser is WAY, WAY too much for your Skybolt.

Considering the options, it looks like ballast--------

Naw....

Find yourself a lightweight 21 to 25cc Kioritz engine from a weedwhacker, convert it, install it on that bipe, and have a blast!!

A decent Kioritz will weigh around 2.5 to 3 lbs. ready to fly, and give you about 10 to 14 lbs. of thrust. Do a Kioritz search on this site, and you will come up with a ton of info.

GO FOR IT.

AV8TOR

Hello,
I built, cloth covered, painted, and installed a Moki 135 on a GP Super Skybolt for a local fellow. Not my engine choice, I do what I am told. Nonetheless it was a fine flying airplane with no bad habits at almost 10 pounds. It required no nose weight to balance. What an awesome plane to watch fly.
If you are sure you want a gasser, hang 3 pounds on the nose and check it out. That is what my RCS140 weighs ready to mount. It almost has the power of the Moki 135...almost. But it definitely is heavier.
Tim