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Thunder Tiger Raptors 30-90 - Imperio > RAPTOR 50 Noise during startup
 
 
Helijockey
Key Veteran
Location: 150 miles from somewhere

Replaced the bell, clutch, starter shaft bearings and installed the optional gear on my titan the other day. Now when I try to start the engine there is a loud clicking sound I've checked the clutch bolts and they r ok as well. Any idea what could be causing this? I also replaced the bearings in the engine and flew six tanks before the heli crashed, which is when I changed the stuff already mentioned.
10-28-2007 05:34 AM
 
 
ESWLFSE
Elite Veteran
Location: Terra Ceia, FL USA

Mine has a terminal case of crank clank. Replaced the entire starter shaft, one-way, bearings - no change. I just live with it and blame my Dynatron.
10-28-2007 05:42 AM
 
 
Helijockey
Key Veteran
Location: 150 miles from somewhere

Altimat did u have this problem from day one? In my case it just started after the crash which also damaged the fins on the hyper head. That has been replaced as well and the compression in the engine is fine as well when I turn it by hand.
10-28-2007 06:10 AM
 
 
ESWLFSE
Elite Veteran
Location: Terra Ceia, FL USA

Its been so long I forgot, but it may have been around the time I switched to the new gear. I'm sure its probably a bad one-way but I hate splitting the frames for that. Its just an annoyance for me.
10-28-2007 07:21 AM
 
 
Helijockey
Key Veteran
Location: 150 miles from somewhere

Altimat I started the engine four times in succession today and twice the sound was there when the starter was turning the engine. Then as soon as I took out the starter the sound stopped and the idle was normal. Twice there was no sound while the starter was turning the engine and all was normal.
10-28-2007 03:13 PM
 
 
harmdive
Senior Heliman
Location: Colchester. UK

Hi all

Was going to start a new thread concerning a problem that I have with my 50. This is what I found to cause a clicking sound when I start the heli. It stops when the clutch engages. I'm wondering if there is anybody out there that is having the same thing happen to their pinion gear just shearing in half. This has happenend to me twice now. The bearing that the pinion gear locates into has not ceased. I have replaced starter shaft and both bearings every time the pinion wears and then shears. I do give the heli some stick so it doesn't have an easy life when in the air but I maintain it regardless of cost so I'm not running it on a shoe string. I have thought about the engine being misaligned but this you can't change because of the heli design. I also have the titan and no problems so far. Just waiting to see how long the clutch lasts in this one. You might want to check your pinion gears for the same problem.

N.B By the way, I've flown the new align 600 nitro and it's not bad but my two raptors can live with the best of them!!! Going lipo 6V to see what happens!! Any ideas on the clutch problem will be appreciated.

Cheers

10-28-2007 06:25 PM
 
 
ESWLFSE
Elite Veteran
Location: Terra Ceia, FL USA

I'm about to pull my god-forsaken NR50 out and go back to the old Hyper until the TT Redline comes out. We'll see what we can during the motor swap, realign things, and try again. When mine clanks the one-way is not engaging. When it engages (usually) I get the clanking when I first start to crank and when I release the starter power after cranking. Mine has the QUK third bearing too.
10-28-2007 06:46 PM
 
 
harmdive
Senior Heliman
Location: Colchester. UK

I think I've had that too. Could the one way bearing in the clutch be worn or the starter shaft be worn also at the point that goes into the clutch? Just a thought
10-28-2007 07:06 PM
 
 
helibatics
Heliman
Location: Cheshire, UK

Yes. I've had the same problem. In my case it was the one way bearing in the clutch. The start shaft slips and grabs, creating the horrible rattling sound. Slipping eventually became such a problem it would not turn the engine.

Replacing both the start shaft and clutch eliminated the sound for a short while (and the engine would turn too which was a plus!). BUT - It's back now.

I had one pinion wear out around the bearing. The bearing was too loose, The second pinion was quite tight on the bearing and this one is still perfect after about 370 flights. (Bearings do wear out as I don't have the third bearing mod)

I think the engine alignment on the raptor could be better and it places side load on the start shaft one way, resulting in the problem.

I don't have a carbon base plate and do hammer the poor bird. Are you guys who are having problems running with the carbon base plate on the frames? I suspect the frames could be flexing, but they do look quite stiff!
10-28-2007 10:23 PM
 
 
harmdive
Senior Heliman
Location: Colchester. UK

I have the carbon base plate on both. I didn't really notice any difference during flight when they were not on. I guess it does stiffen up the frame when they're being thrown around. I used to fly a sceadu and one side frame showed fatigue (not through crashing) but from abuse!! slight crack appeared. This didn't have a base plate on and I'm sure this was due to frame flexing through extreme moves. I'm wondering whether to fit the third bearing to stop the two bearings wearing out. Is it worth putting one in. My titan feels sluggish compared to my standard V2 and I'm sure this is because it weighs more. I don't want to add any more weight if I have to!!!
10-28-2007 10:38 PM
 
 
helibatics
Heliman
Location: Cheshire, UK

Some of the guys at my club have installed the third bearing but unfortunately some of them have gone and bought 600N's before we could assess if the third bearing support helps bearing life.

I'm wondering if the third bearing might stabilize the clutch bell and stop the clutch one way wearing out.
10-28-2007 10:48 PM
 
 
harmdive
Senior Heliman
Location: Colchester. UK

I can't understand why people jump ship because there is a new machine on the block. They must have money to burn. The new trex nitro and electic helis are good but I think any heli will do what ever the sticks tell it to do!! Here's one to stay with the raptor!! I know for sure the raptor will stand up to more punishment than the trex's. !! Parts are still cheaper too!
10-28-2007 10:55 PM
 
 
ESWLFSE
Elite Veteran
Location: Terra Ceia, FL USA

My Raptor still outflies me so I'm not interested in replacing it either. Mine has the GF baseplate, QUK 3rd bearing, new clutch, starter shaft, and all three bearings and continued to do this since I replaced/upgraded all this stuff. It can't be built any stiffer and is very smooth and quiet in the air. The clanking is much less of an issue now that I finally kicked my NR to the curb and went back to the old trusty Hyper. Almost no cranking going on anymore now anyway. Start it once and burn a tank!
10-29-2007 03:08 AM
 
 
AWSeeker
Heliman
Location: N. Canton, Ohio

I've been flying mine with that also... I replaced the clutch (with the one way bearing included) with no change as well as the starter shaft.

It used to be during flight but now you can only hear it as it starts up and for about 10 seconds after that...

I pulled the engine/fan after replacing the clutch and ripped the engine down and found nothing..

Still looking but flying it now anyhow.

Paul
10-29-2007 03:46 AM
 
 
Qrrambero
Veteran
Location: San Francisco / Bay Area

Engine Bearing. I guarantee it will be gone after you replace them.
Sorry I read the last post and I did not read your. You already replaced bearing.

Ae
10-29-2007 04:32 AM
 
 
jschenck
Elite Veteran
Location: La Vista, NE.

harmdive - next time you install the bearing on the pinion put a couple of drops of green loctite on the pinion where the bearing goes. This will keep the bearing from slipping on the pinion and eating it away.

also before tightening the engine in place on the frame run the starter on it. helps get everything lined up. I will run it a bit, tighten it all a little, run it again and so forth until it's all buttoned up.

as far as the one-way clutch bearing slipping try putting a drop of oil in it.

...yep...
10-30-2007 03:34 AM
 
 
harmdive
Senior Heliman
Location: Colchester. UK

Thanks for that. I'll try it. I might go for the Quick UK bearing block aswell to see if it will help.

Cheers
10-30-2007 06:55 PM
 
 
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Thunder Tiger Raptors 30-90 - Imperio > RAPTOR 50 Noise during startup
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