Problems with 611/9256 ?

[phoneman]

OK-here's the problem. Today ( after planting the Raptor 50 in the dirt ) I get the Bergen EB in the air. Just switched over to Mobil 1 racing 2T synthetic oil at 4.5 oz/gallon---motor was broken in on Pennzoil 2 stroke aircraft oil ( dino oil ) for 2 gallons. Last week I noticed that I wasn't getting a really strong punch out like I had been getting. Today I put in a new plug and changed the oil so I figured I would need to start adjusting the needles. I ran 1 tank of the new oil before I adjusted the needles--when I set the heli down after that first tank I noticed the tail servo pulsing after I shut the motor off. If I turned the heading hold off it didn't pulse--when I turned the hh back on it would not pulse until I moved the rudder stick and then it would pulse until I turned the hh back off. The motor was running fairly sluggish for that first tank so I let everything cool off a little bit ( while I looked at the carnage pile around the Raptor ). I leaned the needles a bit and got the motor running smooth and hovered around for about half a tank and landed so I could check the tail--everything was working perfectly--no pulsing in hh. I started the heli back up and flew the rest of the afternoon and never could get the servo to pulse again, I've never had the gain turned up high enough to get any tail wag-could the motor running sluggish have caused the servo to heat up enough to cause this problem ? The tail likage works smooth as glass with no binding and I'm definitely not working the tail very hard--just basically flying around --anybody got any ideas ? The 9256 that came with the 611 ( both bought new ) has always felt a little notchy so I've been keeping an eye on it. Thanks for any possible answers--Dean

[SeaHawk]

Your wasn't right next to the heli with your transmitter on, were you? I have had servos jitter when right next to it with my radio on. Move away, no problems.

[phoneman]

Well--yes and no. I'm using a 9303 2.4 and it did not seem to make any difference if the tx was close or not. I flew again all afternoon today and tweaked on the needles some more and it never did act up again but I will be keeping a close eye on it. Now if I could get my engine to not bog on uplines and loops I would feel much better--Thanks-Dean

[lperagallo]

phoneman,

What is your pitch range? Don't go above +10 and it shouldn't bog in loops or rolls. Take it down to +9 and see if that helps. Loops are all elevator, so you don't need to put in all that much collective.
Lou

[phoneman]

Hey Lou-where have you been hiding ? My pitch is -5 to +9 with 0 in the middle ( but I am going to recheck this tonite just to make sure nothing has gotten changed ). When I give full throttle it takes off pretty well but seems like it bogs the motor-especially if I stay in it very long. The needles are just abt 1/8 turn in from 1 1/2 turns out and the bottom end and transition is pretty smooth The last loop I did yesterday almost bit me in the rear--motor completely bogged out at the top ( even though I had brought the throttle stick down at the top of the loop ) and the heli just kinda fell back upright-slowly spun around a couple of times-and just kind of slowly started descending. I got off the throttle a little and it picked back up enough that I flew it back to myself-got it stopped in a hover and it went back to running perfectly. I'm not sure what is going on but I don't need that to happen again. Right before the Raptor hit the ground Sunday the phone number for Heliproz was already flashing in my head--I thought I was going to see Bergen's number yesterday.

[lperagallo]

phoneman,

Well that's not good about it bogging down at the top of the loop. You still don't have much time on that engine so you may not be getting all the power yet. Since the engine is still new, I don't really want to tell you to lean it out, but you could try leaning the HI needle about a 1/16 or 1/8 but no more. Then open the LO a 1/16 and give that a try.

What ratio are you running? Is it a Hanson modified engine? If so what level do you have? Hanson had me change out the stock ratio to run at a higher RPM, so you might be running a bit low if you are on the stock ratio.

Also, I forgot what model you are running. Is yours an EB with 800MM. What headspeed you running.

Lou

[phoneman]

Lou-it's the mid range mod that Hanson does and I explained what heli and the ratio and blade size it was going to have. Al ( I think that's his name )said my ratio would be right for the blade size and what I was wanting the heli to do--no 3D-just nice big loops and rolls and such. I'm going to check my gear ratio again and give Hanson a call to make sure it's what I need. I really don't want to run it any leaner--I'll keep at it until I get it right--thanks--Dean

[phoneman]

Lou--I just got home and checked- 12 tooth pinion gear and 90 tooth main gear--+9-0--5 on pitch. Just had another brainwave--the clunk I put in the tank is one of the big weedeater type clunks-I wonder if it is restricting the fuel flow when I go to full throttle. I'll give Chris a call tomorrow and see if he has any ideas--thanks again--Dean

[phoneman]

Oh yeah-it's an EB with 810 mains--running about 1490-1500 at hover with the throttle curve slighly flat at hover pt and then going pretty linear to 100%