RE: What do you have your conversion in???
 

what do you think i should put my 18cc poulan weedeater engine on? i was thinking either a stinger 60, a laser 1/4 scale, or a GP super skybolt. what do you recommend? what is the power of my engine compared to? this is my first conversion. any other suggestions

RE: What do you have your conversion in???
 

i didnt quite understand how to do this and i rushed it. i completely shaved off the fins on the flywheel. all thats left is the magnet and anoter chunk of metal on the other side. i think i screwed up. will the engine run with no fins? i cant start it right now becase i dont have a conversion kit yet so i cant attach a prop.

RE: What do you have your conversion in???
 

I completely removed the fins on several of mine. After breaking the fins off, I cut them down with a die grinder and smoothed off where they were. I then balanced the flywheels.

Enjoy

Jim

RE: What do you have your conversion in???
 

Here's mine:

1: A Bud Nosen Champ, 100"+ span, 14#, 26cc Ryobi 4-stroke, APC 18-8W, C&H ignition, good slow relaxing flyer, unlimited verticle(not really, hell not even close).

2: Hanger 9 Funtana 46, 56" span, 6.25#, Echo 21cc, RC Ignitions, haven't flown yet, people said this couldn't be done!

3: Scratch designed/built Dornier DO-18, 96" span, 20?#, Ryobi 31cc, MA 16-10, taxi tested but too heavy to fly, sold

Doug

RE: What do you have your conversion in???
 

I would keep the air flowing fairly fast over the Funtana,s wings most all the time. If you go to land make sure the speed is enough. If you have to go around...do not punch the throttle to hard at one or it may tourque into the ground. Because of not much wing area verses torqe of engine!!!! Try testing that stuff at high altitude. Good luck....Capt,n

RE: What do you have your conversion in???
 

Though i'd bump it up and see who have any new planes with gas conversions :)

RE: What do you have your conversion in???
 

Balsa USA 1/4 Fokker Dr1 Tri-plane with Honda GX35 4 stroke
Balsa USA 1/4 Fokker DVII with Honda GX35 4 stroke
Sig Rascal 110 with Honda GX31 4 stroke
Dynaflite Super Decathlon 1/4 scale with Homelite 33cc

Currently building a Wingspan models giant B17 with 4 conversion engines.

RE: What do you have your conversion in???
 

Subarubrat, I didnt know you had a DVII with a conversion on it. Cool. Here are a couple........well, all mine are conversions.

Fokker DVII (Balsa USA) with a Briggs and Stratton 34cc four stroke
Fokker DVIII (Well, whats left of it anyhow) with a Homelite 33cc chainsaw conversion (Balsa USA)
Sopwith Pup (Balsa USA) 25cc Poulan Featherlite leafblower conversion
Bud Nosen Aeronca Champ 102" with a Homelite 30cc weedwacker conversion.
Several more in the process of building.

Here are some video's of the Pup and the DVII
http://www.putfile.com/propnut

RE: What do you have your conversion in???
 

A couple of the Pup and the DVII

RE: What do you have your conversion in???
 

The picture is of a test to determine vibration levels and strength of wing mounted firewall. It gives a vague idea of the madness. It is not pretty.

Bill

RE: What do you have your conversion in???
 

Interesting motor....What is it?

RE: What do you have your conversion in???
 

The running engine is an MB 290 McCulloch 25cc blower engine.

Bill

RE: What do you have your conversion in???
 

Bills: do you have any flights with the MB290 engine yet? Thanks Capt,n

RE: What do you have your conversion in???
 

Yep, I had finished the frame-up and never completed the job until I ended up with an extra GX35 and it had to go somewhere. A great engine and a great plane. The DR1 has the most striking appearance and once in the air is a good plane. But I suck at getting it off the ground and often have 2~3 attempts before it flies. But I think I am in good company because others report similar odds and landings are also a complaint but I seem to bring it down smoothly.

RE: What do you have your conversion in???
 

Hey Guys

Just thought I show you what my friend and I fly the 31cc Ryobi in. All 5 have Ryobi's.
CM Pro Zero, P-40E, Spitfire (repainted),
Great Planes PT-19 (84") and an ESM Hurricane.

All fly great,

Cheers KMM

RE: What do you have your conversion in???
 

Subarubrat,

Any chance of posting a few pics of your DVII with the GX35?

A video perhaps?

Maninder.

RE: What do you have your conversion in???
 

KMM: All your planes look good. I like the one with the kinda purple color the most. Real sharp warbird. Best Regards Capt,n :D WEST MICH USA

RE: What do you have your conversion in???
 

I've got a Homie 30cc in my Extreme Aircraft Cap 232 and a Homelite 33cc in a Kankge Rearwin Speedster. The Speedster flies great, very scale like. The cap is still on the bench. I'll let you know in a couple of weeks how it flies. I don't expect to be able to do 3D, but I think it will fly basic aerobatic manuvers.

RE: What do you have your conversion in???
 

Ryan's Rebel with a Ryobi 31cc

RE: What do you have your conversion in???
 

KMM,
Is the Ryobi an easy fit in the Great Planes PT-19? Would either the short or long shaft engines work o.k.? Am thinking about this model as my first large gasser ;)
Thanks,
Steve

RE: What do you have your conversion in???
 

Hi Steve, yes fits no problem at all. Long or short shaft will work just as well as each other. It's a really good first gasser plane as it fly's like a big trainer but looks way better. Good luck with it.:D

Tim

RE: What do you have your conversion in???
 

Tim,
Many thanks for your reply - that's great news! :D

Is it o.k. to PM/e-mail you with questions? http://www.rcmf.co.uk/4um/Smileys/live/embarrassed.gif

Cheers,
Steve

RE: What do you have your conversion in???
 

yeah no problems Steve, ask away. I'll do my best.

Cheers Tim

RE: What do you have your conversion in???
 

my conversion has generated a lot of positive and negative feedback lol. the engine is a CRRC Pro GF45i. it used to be a spark ignition engine. but as you can see from the photos ive converted it to run methanol and a glow plug. fuel is straight methanol/synthetic oil at 40:1. the carb has had no internal work other than removal of the filter screen and reseting of the needle valve arm. it is methanol compatable out of the box.

the adaptor is one that i machined up myself. i also know of another of these engines that has been converted as well....i sold him one of my adaptors!!!. performance is great...pulls like a train and a rock steady idle. it runs a 20x8 bolly carbon prop at 7800rpm all day everyday. it develops just over 12kg's of static thrust. airframe weighs 8kg's. we've worked out its making around 5.5hp in its current configuration.

airframe is a Pro Built Extra 300SP. 84" wingspan. it also has a smoke system installed. the whole package flies like a dream although im still learning with it lol.

cheers
craig

RE: What do you have your conversion in???
 

hardtop: If methanol is cheap there....seems like a great idea to me. What do you see as a drawback? Thanks Capt,n

RE: What do you have your conversion in???
 

a drawback??......hhmmmmm

i havent personally run into any drawbacks with my engine so far. although i have had to give advice on one of these engines that refused to start....was found to be the internal needle valve arm set too low and so no fuel would flow. it now runs fine.

on the costs of fuel.......for me methanol is relatively cheap as i mix my own fuel and i can obtain it through my drag racing contacts. where i live petrol for a car costs more per litre than methanol.

another drawback ive seen is the unacceptance of running this fuel in a walbro carb. the general consensus seems to be that the methanol will "eat out" your carb. this is totally untrue. however....if you try to use nitro in the fuel THEN it WILL "eat" your pump valves and diaphragm very quickly. it is the nitro that causes the problems...not the methanol.

the only other drawback i see is the issue of obtaining an adaptor. while CH Ignitions do market these i found that at the time i needed one in a hurry and so i machined up my own.

while the above mentioned arent major drawbacks per say they are issues that can slow you down from completing your installation.

cheers
craig

RE: What do you have your conversion in???
 

happy new year to all

cheers
craig

RE: What do you have your conversion in???
 

hardtop351: Happy NEW YEAR...back at you....and everyone else too!!!! Capt,n:D:D

RE: What do you have your conversion in???
 

And heres the other one Craig mentioned. Oh, and Happy new year everyone.

RE: What do you have your conversion in???
 

ok so im a plane junky, i have recently embarked on conversion engines, i have had a 120 size cap 232 hanging in my room for some time now, wife let me buy it on our honeymoon believe it or not, it had a 120 surpass yuck no vertical just flat line flying, havent been able to get the mula to get a big glow so i recently saw on this site converting weed wackers and chainsaws, im hooked, i have spent the past weeks untill 2 am working on my 3.3 homelite, swapped soldering job on an antenna for it. its been a ton of fun working on it think it comes out to 50 couple ccs the only trouble ive had was cutting all the excess junk off of it fins, all the stuff mounted to the crancase cover and replaced the rubber hose mouted carb that goes over the reed valves, have motor mounts for it all welded up im hopefully gonna fire it up tommorrow, look out fellas ill never buy another zdz for as little as i have converted my new engine for, any ideas on what prop to run on it? have fun and anyone put a conversion on a showtime 100?[>:]

RE: What do you have your conversion in???
 

i think a 50cc engine would turn a 22x10 easy.

watch out for ignition interferrence but. lol

cheers
craig

RE: What do you have your conversion in???
 

i have a 9cap super pcm and some fm recievers what do i need to do for interference

RE: What do you have your conversion in???
 

HI
I too have discovered the joy of these engine (thanks Tim) .
My is a ryobi 28cc in a four star scrach built at 85 inch span. Best fling plane I have haad in ages. It weighs just under 7kg.
I will post a link to a video if i work out how later. Thanks

RE: What do you have your conversion in???
 

as far as this is concerned....and this is only my opinion....to minimise the chance of reciever problems make sure you use a resistor plug. next use a braid around the plug lead and ground it at both ends. finally use a fully shielded sparkplug boot. this should help lessen the chance of you losing your aircraft because of ignition noise.

also dont use any metal fittings to connect your throttle servo to your carb. keep your reciever and throttle servo AT LEAST 12 inches away from your ignition system...this includes the battery and switch that is used in cdi systems.

i have personally had more success from using a pcm reciever than a normal fm reciever.

cheers
craig

RE: What do you have your conversion in???
 

Or just get rid of the ignition system. :D;)

RE: What do you have your conversion in???
 

I agree with everything you said, except for two things...

One, we found in our experiments with ultralight aircraft that the shielding was more effective when it was grounded on only one end; not both. This has also been my experience with model airplane ignition engines.

Also, I don't particularly recommend PCM for gas ignition engines as they can mask interference problems until it's too late. If you want to fly PCM, thoroughly test the system for glitches first with PPM.

AV8TOR

RE: What do you have your conversion in???
 

ok sounds good i just got the prop adapter made up tonight got it drilled and threads in it drilled the center prop bolt for a spinner i put it all on the scales and i am a bit concerned about plane and engine weight i dont know what i should shoot for with the cap 232 and 73" span im at 13.2 give me some opinions guys

RE: What do you have your conversion in???
 

i did try fm first and had all sorts of problems....i thought switching to pcm would cure the problem which it didnt. and so i then thought that if super tigre can get a 45cc engine to work on a glow plug then so could i.........and the rest is history as they say lol.

and yes wiz....you CAN lose the ignition system too lol.

cheers
craig

ps....i hope you got everything tied down tight wiz.....bit windy over there i hear

RE: What do you have your conversion in???
 

Never tied anything down mate. Its all to wet to blow away. :D
Finished the Christen today while I was stuck inside. its a sweeeeeeeeeeeet bit of gear. :D knock up a muffler and fly it. I bet you can't guess what I'm going to do tomorrow.

RE: What do you have your conversion in???
 

I am flying a Ryobi 31, Bowman rings (2), CH ignition in a SIG FourStar 120 kit bashed into a ME-109.

The motor runs stronger every time I fly it. Sweet.

billrad