OS 32 temp.

[wang_uk]

hello me again. I have a OS max sx 32 in my raptor but concerned about the temp. Iv read about touching the crank case and to count how long before your finger melts to it. how long should i be able to leave my finger there then?

Regards
Stefan

[Ade_Law]

depends what fuel your running but generally anything under 10secs is getting towards bad news.

its not so much melting as painful!

Ade

[jimbob]

If its too hot to touch, its too hot.
If you can leave it on there for about 10 seconds without screaming or losing flesh then its probably ok.
If you can leave it on there indefinately, then you might have some room to lean it out some more.

[wang_uk]

hmmmm. 6 seconds and it burns at the moment. Problem is if i make it richer it starts bogging down near full power and im only clicking back a max of 4 clicks when this happends. So what do i have to do.
Cheers you two.
Stefan

[jimbob]

its likely that you have too much pitch if its bogging down.

Is it a new engine? It could be that its just not run in yet.

How much pitch do you have?

[wang_uk]

it's old ish engine. Pitch curve is 0-5-9

It's fly's really nice now with a great power climb out just runs hot.

[jimbob]

if the climb out is good, then perhaps its just about right - it will run hot!

What fuel are you using?

Perhaps you need a higher nitro and a richer setting?

[wang_uk]

im using 15% nitro.

[wang_uk]

any more ideas

[Ade_Law]

just been speaking to stef on MSN, idle sounds little on the lean side by the sounds of it. advised to richen it a bit.

6 secs isnt too bad but the cooler it runs the longer it lasts (within reason).

hes running century heli juice, not run that myself so not sure exactly how cool it will run on that.

the 30s do tend to run warmer especially the TTs.

Ade

[jamiem]

while me and stef were out flying today, he was adjusting and setting up for about 3 hours while i was getting some decent stick time in. when he was checking his temp i thought i best check mine too, and it was probably 4 or 5 seconds til it got too hot to touch. i richened it 2 clicks and i twas a little better, but not really much different. the thing is i spent a good few hours setting up the throttle and pitch curves, and it doesnt change head speed (audibly) and climbs out with good power. im worried that if i keep richening it up then im going to loose the power. the engine is a TT39 which ive read do generally run warmer. im running wildcat 20% at the moment, but im about to run out of, so should i consider a change?

Jamie

[wang_uk]

Well i have been back out and braved the WIND. I have managed to bring the temo down so on the 10th to 11th second i have to remove my finger. Power still good all the way. Thanks for all the advice and the msn help from ade.

[ChrisB]

I can keep my finger on my Hyper all day long after running,its barely warm and i mean this quite literally

[Ade_Law]

larger motors run cooler

Ade

[ChrisB]

aw poo,the TT39 we were running yesterday was just as cold,running on Wildcat 10 i think