Hi i have just gotton my hands on an extra 300L 24% (ya i know 1% bigger and i could post this in the giant scale). Owner says it came in at 12 lbsS with an mvvs 26cc i have found all kinds of engine suggestions everything form a 1.20 glow all the way up to a 35cc gas. the plane is VERY tail heay. with the 26cc in the nose the ignition and the engnition pack were installed direcctly behind the firewall and the other pack about 1 inch behind the cg so i could easly balance it out if i added more wight in the nose. (bigger motor?)

(i have been told that a saito 1.80 will not balance this model evan with the rx pack in the cowl with it... making it very hard, almost, impossible to land)

What would you use in this plane..


(looking at gas for its economical running )

Steven

Is that with a pull pull or rudder servos in the tail?

pull pull rudder

split elevator that runs off a single servos he said somthing about a bellcrank and it was like the pattern guys..

ZDZ is about to come out a 40cc FAI gas engine. Check it out at www.rcshowcase.com.

You best option to balance it out probably will be a gasser heavier than the current 26cc one. The other option will be to extend the engine out a litt bit by spacers, and remount the cowl.

I used to use a RCS 180 motor (3.5 lb) on my Gas Pattern ship and it is balance ok. I am waiting for the new ZDZ 40cc FAI to cut the weight.

--qc

is there anything in the 30-35 cc range that hsa a decent history im scared the zdz will hurt the all important wingload

I am not aware of a better 30-40cc gassers than the new ZDZ F3A. My gas pattern flies pretty heavy with RCS180 and is about 11 lb. With ZDZ F3A, it should be at least 10oz lighter.

I will look around for the motor i quick google search did not find a distributer but i will keep looking for a "ZDZ F3A"

Try here:

http://www.rcshowcase.com/html/ZDZ/zdz40f3a.html

Be aware that the F3A is a fantasy engine at the moment, R/C Showcase have had this on their site for many months now and will not even estimate an actual availability date or pricing. If you want an engine now, you should look at their regular 40cc RE:

http://www.rcshowcase.com/html/ZDZ/zdz40re.html

Personally, I would also look at the Brillelli 46GT:

http://brillelli.com/brillelli_engines_010.htm

It is vastly cheaper than the ZDZ, is very light, makes good power and the service is superlative. Downside is that it is a side intake/side exhaust engine, so it will probably require some fitting into your cowl.

Either one of these engines (especially if fitted with a good canister exhaust) will rip your Extra around (at 13lb or so) without an issue. I wouldn't get hung up on adding some engine weight, it sounds like you need it for balance anyway and the plane is big enough to carry it without a problem.


Mark

well the 46gt would torqu roll it at a high idle. So it may be an option but, think at 13lbs with a 73 inch wingspan the wing load is getting up there. at what point should i be consinrned about it..?

Mike at RCShowcase told me around middle December of 2006 that the FAI engines are in production and should be available in the US market earlier this year.

--qc

Depends a bit. What type of flying are you planning on (I know it's the IMAC forum, but that's no guarantee)? 3D requires a lower wing loading than precision/IMAC stuff. How much wing area does it have? 13lb does sound heavy for a 73" span model, though. At that span loading, it will have a pretty steep approach angle for landings. Not necessarily an issue, but if you were expecting a floater you might not get one.

Someone in the giant scale or gas engine forums put a Brillelli 40cc in the Wild Hare 73" Edge (73" span, 1090sqin) and it came in somewhere over 12lb (maybe over 13lb, I do not remember exactly). He was very pleased with the way it flew and said the gas engine version was fantastic. Just a thought regarding wing loading and size...


Mark

That would be excellent. Of course, last year they said a late summer release, then a late September release, then a December release, etc... I hope it gets here soon, it should make a great engine for gas pattern stuff and the smaller scale planes. The rear exhaust configuration makes a pipe or canister so easy to set up and the rear intake keeps cowls from getting chopped up and leaves a sleek looking front end. Hopefully the price will not be prohibitive for those of us less committed than the high end pattern guys. Yes, I want it ALL.


Mark

stupid questions that is probably very obvouse, what does "FIA" stand for /mean? like i know there is FAI fuel (fuel with no nitro manthan in it) are these like moki engines..?

Steven