dumb thumb: Lost my RCLeague Yak54

[GremlinX]

That is too bad, you took it well though kiddo! Nice plane, get a fuse and be back in the air!

[xtdsm]

Ouch, sorry for your loss Abdullah.

Why did your engine quite on you tho, did you investigate the engine problem?



keep your head up bro.


Ahmed

[atique]

Question. Why did the Engine Fail


Answer. Fouled up spark plug

Can any body comment

1. After how many hours should we clean the plug in Engine break in phase.

2. After how many hours should we clean the plug normally

[Kiwi]

Abdullah,

If the plug fouled it really means your mixture was rich. Thats not uncommon with a new engine as a lot of people wrongly assume running a gas engine rich is good. Actually running them lean is a killer, very bad bad thing to do. But running them rich is also bad as it creates a lot of unburned fuel and oil in the combustion chamber and that can foul the plug.

Another cause is using too much oil in the fuel mix to run the engine in. I don't have the DA mixture in my memory but 32:1 with a mineral based oil. Lawn boy or any good quality air cooled motorcycle oil will do the trick. Don't use synthetic oils to run your motor in. With a 50cc engine two or three gallons should be enough to run it in then go for the 80:1 synthetics.

I am sure the ambient air temperatures are very high in your area so care needs to be taken with good cooling of your engine as well. Not that a DA50 needs to be baffled in a big round cowl, but it will need good attention in your extra.

When you get your engine mounted post some pictures here so we can help you with cooling if you need it.

I still cannot get over how nice your flying facility is.

Kiwi

[atique]

Thanks a lot for the advice.
I have learnt it the hard way
I will definately post all the pics that i have on the engine mount and cowling. do advice me about the installation of engine.
I will also post some pics of our flying field and the hanger and club house and ATC

[zivbit]

Well,

Looking at that great field, you should have "follow the yellow brick road"...
Gold plated runway... dude..

Best of luck with the next one.!

Zivo

[rc4flying]

	Quote: Originally Posted by atique
	Thanks a lot for the advice. I have learnt it the hard way I will definately post all the pics that i have on the engine mount and cowling. do advice me about the installation of engine. I will also post some pics of our flying field and the hanger and club house and ATC

Atique, Sorry to see your misfortunes with the plane.
I say that you always want to learn from problems like this, whether they are your problems or someone elses. The key thing is to learn from them.

Also, that is a GREAT looking field you are flying at.

[atique]

i am starting on the Extra 330L also from RCleague, it looks like this

i will post some more pics of the build also

[atique]

Extra 330L from RC league


here is the link\for my Extra in the making

[3ddd]

like kiwi says tune your engine for the right rpm and use oil mixture for brakein.running it rich will also wash the cylinder out and it will be wore out before it is broke in.on a da it is 32-1 for three gallons on dino oil and then on to the syn at 70-1 in high heat .good luck with the extra and above all have fun

[atique]

i put a new DA-50...... and same sort of thing repeated as it happened on my Yak.... engine wanted to quit.... i was using old ignition harness with new engine.....i think it was a faulty Ignition harness which led to my Yak54 crash