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HomeAircraftHelicopterThunder TigerOther › Raptor 50 tail glitching < some interesting notes>
02-08-2006 04:13 AM  12 years agoPost 1
seflyer

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Northern California, Palo Cedro

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been dealing with this issue for a short time now, found a few items of interest thought we should all be aware of.

1. fan shroud clearance for hyper head, the shroud needs to be clearanced for top of the hyper head, the non conductive material on the head quickly wears off in the contact areas and leaves a black powdery residue, which does conduct rf.

2. sides of the hyper head contact inner side of side frames, same powder residue, a light filing of the edge of the head gives clearance.

3. engine backplate screw bosses contact lower portion of engine mount, does show slight signs of rubbing, engine was tight and centered. possibly adding slight pressure to the case causing premature wear of the rear bearing.

i have personally converted 2 30's that were glitch free before conversion, both with tt kit. both hyper powered, i also have a os 46 powered 50 that exhibits none of these strange glitches.
all were trouble free 30's to begin with and have developed these problems after conversion.

i do not believe fuel mixture settings are causing these problems as the setups are different in each heli.
kevin

My heli is right side up -- the world is upside down

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02-08-2006 07:31 PM  12 years agoPost 2
robhurlin

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Pretoria, South Africa

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Have you tried earthing the tailboom to the engine mount? Apparently static builds up from the belt causing static discharge - this affects the gyro and causes tail glitch. I have not tried it on my 50SE with Hyper because I have not yet had any problems. Has anyone else had tail glitch caused by the engine touching the plastic frame??

Rob.

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02-08-2006 08:14 PM  12 years agoPost 3
seflyer

rrApprentice

Northern California, Palo Cedro

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yes , i have done the tailboom bonding, made no difference, as stated before these two helis were perfectly flying until the hyper installation, nothing else was changed. one experiment that we tried was to reinstall a 0s 32 with the 50 gearing, no tail glitching was noted. i do believe the combo of the hyper in the airframe is causing this. a 46 engine will be tried this weekend.

over my 20 years of flying helis, i have come across some strange things like this, it will just take some time to work out.

My heli is right side up -- the world is upside down

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02-09-2006 08:32 AM  12 years agoPost 4
robhurlin

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Pretoria, South Africa

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Fascinating - let us know when you get it sorted!

Rob.

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02-09-2006 11:02 AM  12 years agoPost 5
Peefor

rrVeteran

Norfolk UK

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My experience has been the exact opposite.

I built two 30's with OS 32 motors. After a short while both machines used to have jumpy tails. We just flew them anyway. I never did find a reason why they jumped.

I then built two R50's with exactly the same gyro/servo combination (401/9253/4). Neither of these machines has ever exhibited the jumpy tail behaviour. One started with a Hyper 50, the other a std 50, both now have Hypers.

The heads do touch on the fan shrouds as you suggest, but we live with that.

The other differences were the 30's had PPM Rx and 2400ma batteries and ordinary servos, whereas the 50's had digital servos and Duralites and PCM Rx.

Good luck on your quest.

Pete

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02-09-2006 01:25 PM  12 years agoPost 6
robhurlin

rrKey Veteran

Pretoria, South Africa

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I also use a PCM Rx (JR 900S)and digital servos (9252) and 401/9254 and GV1. Not a glitch in site, thank heavens. It can be caused by so many things, but usually just mixture of idle screw being too rich. My Hyper is 30deg on the lean side of centre. I don't think my engine is touching the frame on the 50SE but I will have a look. I was pretty careful when building her to make sure of clearance. Also never had a problem with my old R30v1 with TT36 and primitive GWS rate gyro and analogue servos and PPM Rx (Futaba 7ch). I did have some tail wag from overspeeding when I upgraded the motor to an Irvine 39 though.

Seflyer, we look forward to hearing your solution.

Rob.

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02-19-2006 04:00 PM  12 years agoPost 7
seflyer

rrApprentice

Northern California, Palo Cedro

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some more testing has shown a good amount of improvement
no glitching with the os 46 installed, but in the same sense no power either<-- hence the reason it was replaced.

some more run time on the 50 showed a marked inprovement in running and little to no glitching now. have not flown the other one due to vertical deceleration trauma, broken canopy latch hooked the canopy over elevator arm. kid has all the parts and will be in fine shape once again.

strange, once i mentioned this problem it has nearly disappeared.
what luck huh?

My heli is right side up -- the world is upside down

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