First 40% and having engine problems

[yearn23d!]

Hey Guys,
I have a new 40% JTEC 330L and with a 3W 150b2 on Pefa cannisters. I intially started flying the model with a Vess 32A and did not have the cowl baffled. I flew the plane for about 1 gallon on that prop running a 32:1 mix of LawnBoy Ashless. I then got the fuel line up against the header and had a dead stick which ended up with a broken prop due to tall weeds. I then went to a Vess 32C and noticed a little motor sag so I baffled the cowl and still noticed the problem. Now I have a XOAR 32 X 10 to try to give the motor some more revs and still have a problem with the motor shutting down on long vertical climbs. Total Time now on the motor is about 4 gallons. Am I expecting to much from this motor at this point or do you guys think I may have some other problems? Thanks in advance for the help!!!!

[Biff]

Dude, the one fiddy is a horse. You just gotta it through the colt stage. The break in takes a while. Pretty much going to run stronger every time you start it. But don't load it too much right now. I'm insane about break in. I don't do much in the way of extended vert lines nor hovering for several gallons. Probably overkill, but my engines are jewels. 32X10 is a great prop and the Vess is a monster. I'd drop down a bit from 32X10 for break in. I think you are expecting too much from it right now, but fear not bro, go easy and you'll have a great engine soon. WELCOME to the Flying Giants by the way dude!!! Biff

[yearn23d!]

Thanks Biff,
I Kinda figured that I was just expecting a bit to much. I'm still trying to be patient, but I'm having a real inner struggle!!!

[dmichael]

As much as I hate to disagree with Biff, the fact that the engine is shutting down on verticials says to me that there is something amiss here. Perhaps it is fuel delivery related since it only happens on verticals. Although it is better to load a new engine lightly, it should still run.

Dave

[TeamFlatout]

Check the temps. You say the engine is not baffled, this is almost a must to keep that engine cool especially in extended hovers. A very good flying buddy of mine, Ryan Evans, who was a Masters contestant is an unbelieveable pilot. I do a lot of calling for him. After he hovers for an extended amount of time he always pulls out and does long, faster than normal point rolls and big loops after a long hover. He says the reason he does this is to cool the motor down from the extended hover if he does one. Since then I have tried the same thing and the temps do come down a bit. Hope this is some good advice to ya.

[adrian]

how about making the high richer - upline sag??? to lean on the high - no?

[RobertV]

If it ran fine before you landed in the weeds, I'd check to make sure that the clunk is not in the front of the tank or even that the pickup line has come off completely. Tygon tubing swells a bit when in gasoline for several flights so if you didn't safety wire, it may have come off. I've had that problem before.

[TheTank]

	Quote: Originally Posted by RobertV
	If it ran fine before you landed in the weeds, I'd check to make sure that the clunk is not in the front of the tank or even that the pickup line has come off completely. Tygon tubing swells a bit when in gasoline for several flights so if you didn't safety wire, it may have come off. I've had that problem before.

I agree with this 100%, when it went into the weeds, and broke the prop, perhaps the clunk slid to the front of the tank, now when you pull vertical lines, it grabs air. The tank is easy access in that airplane, I'd pull it out and take a good look to see where the clunk is, as well as check that the lines didnt come off.

[yearn23d!]

I took the tank apart and it didn't have any issues. I think the root of the problem is the prop. The 32A Vess ran fine for 3 tanks of fuel and seemed to have no problems. I think I may need to go to a 30 X 12 because the Vess 32A is a lighter load on the motor than the 32 X 10 I have on it now. I am also going to reconfigure the baffling I have on it now and see if that helps.

[DKjens]

Why not just get another Vess32A and run that prop until the engine rips the snot out of it, then go to a bigger load prop.
Isn't that particular plane on the heavy side? If so, a 30x12 will be worse, especially on uplines.

[yearn23d!]

i think that is the problem. I will have to buy another prop

[torquen]

before you change your baffels please post some pictures of your current baffleing. Also take some pictures of your exit hole for cooling.
Garrett Morrison