RE: Conversion Photos
 

Great thread. Cause I was under the impression that everybody converted theese engines to electronic egnition. I see now that that is not the case.

How does the flywheel and the coil affekt/ reduse the performace/weight of the engine?
I'm about to deside how to convert a 49cc Jonsered chainsaw engine. add electronic ignition seems cool and interesting, but a bit prizy and demands some work and equipment.

RE: Conversion Photos
 

Super Z

Hello
I ever use in my life magneto spark in my Weedeater Poulan 25 cc , in my club have two converted chainsaw flying 36cc and 40 cc ,with magneto , a 45 cc Zenoah with magneto and a CRRC 50 electonic ignition.
I cant compare magneto versus electonic ignition because I have only my Weedeater flying, and never have two same engines with magneto and electronic ignition to make comparison nor the same engine with both types ignitions.
My Weedeater surpased and survived a bit more than 100 hours logged.
I take a new engine from a Weedeater Poulan and put in an airplane.
Never have a problem with magneto , adjust magneto flywheel clearance and forget it.
Carbon in a spark plug 2 or three times but engine fail predictabily and can land and clean.
Use hot grade spark plug.
Weight in the nose but we can balance because we scratch built and make adjustments. Do not worry because planes are big and one of it have 180 g. lead in the tail to balance, but in a 9.5 kg plane , no problem.
Batteries to care, NEVER, no switch, no leads, nice.
Only a rope and gas and the engine start to life.
We fly relaxed planes, no stress flying, slow and gentle.
The converted chainsaws, one have 2 hours flying time and the other have 1 hour, but start very well at 5 degrees Centigrade, with Yamaha Two Stroke at 5%.
The performance of Weedeater is for scale flying in 6 kg. flying wing.
The chainsaws engines are powerful for the airplanes ,if you put at 1/2 throttle is like a rocket, have excesive speed, in a 9.5 kg. plane (dry) and 2.5 m span and the other is a 8.5 kg plane.
You can see a small video of my flying wing and the photo of yellow plane with a child lying in the floor is with a 40cc chainsaw engine, the plane have other engine now, we change after the photos.
Both chainsaw engines are chinese or clon, Jeng Feng (McCulloch) 40 cc and the other is Niwa (Toyama or Gamma) 36 cc.
Happy flying and happy landings
Jose
Argentina

RE: Conversion Photos
 

Super Z

forget the link to my club meeting

http://www.foro-aeromodelismo.com/vi...hp?f=33&t=9257

Happy landings
Jose
Argentina

RE: Conversion Photos
 

I have some video of a couple of conversion I have done.

RC Universe has disabled them so there is nothing to share.

http://www.rcuvideos.com/account/vid...XSLQ2FFLSVFK62

RE: Conversion Photos
 

Here's my Homelite 30cc weedeater conversion...

You can see more of her on my gallery ! ;)

http://origin-images.rcuniverse.com/.../lg-207514.jpg

RE: Conversion Photos
 

Don't forget glow ignition :D

RE: Conversion Photos
 

Niceee...

Any more views/angles ?

RE: Conversion Photos
 

Awesome! nice work

RE: Conversion Photos
 

Thank you Arkz!

RE: Conversion Photos
 

21cc Featherlite, Hangar 9 twist 40. Throttle coupled spark advance.

RE: Conversion Photos
 

Hasn't that thing crashed yet? I seem to remember seeing that about 4 years ago at the Kittanning funfly.


Here's one of mine. A Hannger9 Frenzy with a 19.8cc Mitsubishi engine. YES... the MAG and flywheel is under that cowling. (it's a very small engine) It swings a 16x8 at 8000 RPM, and the conversion only weighs 41oz. That gives this frenzy a flying weight of 8#, 2oz.



http://img.photobucket.com/albums/v9...o/P1010014.jpg

http://img.photobucket.com/albums/v9...P1010018-1.jpg


http://img.photobucket.com/albums/v9.../frenzy_v1.jpg

RE: Conversion Photos
 

That Frenzy installation turned out pretty nice.

Enjoy

RE: Conversion Photos
 

That's cool! I never would have thought an engine with a magneto would fit in that cowling....

Nice work.

AV8TOR

RE: Conversion Photos
 

Your *Frenzy* rocks!

Any flying vid ?

RE: Conversion Photos
 

Thanks for the kind words. Unfortunatly... I don't have any vid of it flying.

That 19.8cc Mitsu engine is one of the smallest and lightest engines I have found. It also makes super power for it's size. One of the reasons it's so light, and why I was able to keep it under the cowl, is because the flywheel is only about 3" across. (It's not much bigger than the spinner I'm using)

Actually, on it's maiden flight... I was under 8 Lbs. But I decided to put on that nice polished aluminum spinner. (they are heavy)

FYI... if you do a search for Maxx Gasser... I stuck one of the 19.8 mitsu engines in a T-max chassis.




Here's one of my other conversions that is still flying. It's a WildStick with a Toro 25cc. The conversion is barely a conversion at all. All I did was to remove the plastic housing, trim a little of the bottom aluminum, and put a prop hub on it. It still has the stock goofy 2 brl carb, air filter, muffler, and the pull starter!!! I'm getting around 7200 rpm with a 18 6-10 prop. The conversion is around 12 Lbs, and it's a little underpowered, but it flys well once it's up. I guess it flys like a regular sport model. (not a 3d model)



http://img.photobucket.com/albums/v9...o/DSC00013.jpg


http://img.photobucket.com/albums/v9...ro/stick_5.jpg