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HelicopterMiniature Aircraft Whiplash & Fury 55 › Stratus assembly - fan too tight with clutch, cause Glitch ?
03-09-2006 07:24 PM  11 years agoPost 1
Oz Goren

Heliman

Israel

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New stratus, assembled by the book, the fan is too tight with the clutch. Gap should be about 1-2 mm but it is actually touching the fan. I wonder what do I do to tune it to the right gap, may be I should remove the washer under the fan (above the engine top bearing).

Also have some glitch issues through inverted/side flights, I wonder if it could be related (metal to matal !)- the pitch stops for a friction of a second, one time it even went to fale safe for 3 seconds (engine down).

Thanks

Oz Goren

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03-09-2006 08:19 PM  11 years agoPost 2
misio

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Check if you have right back plate, ( what engine your using?) If is correct then yes remove engine washer.

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03-09-2006 08:37 PM  11 years agoPost 3
Oz Goren

Heliman

Israel

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Thanks for the reply,
It is OS-91 and the kit is for the OS.
Is it Ok to remove the washer? fan push against the engine top bearing !
Oz

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03-09-2006 08:56 PM  11 years agoPost 4
I3DM

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Israel

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http://www.runryder.com/helicopter/t237008p1/

look at the reply from Beast - it could certainly be the cause.

www.liorzahavi.com

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03-09-2006 09:13 PM  11 years agoPost 5
misio

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Yes you can remove washer

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03-09-2006 09:15 PM  11 years agoPost 6
looseblades

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ocean gate N.J. usa

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witch os engine are you using, the sz needs a different back plate , then the c-spec. and i believe the c-spec pump also uses a different plate. you need to use the washer between the fan and engine. if you are using a sz there is an update plate availale from ma. you do not use the ones in the kit. if using a spec (non) pump there should be two plates in the kit you need to stack together, if using os pump version you need to use only one plate, i have seen a few people use two and it will allow the driver and fan to rub.

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03-09-2006 09:44 PM  11 years agoPost 7
I3DM

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Israel

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He's usng a C-spec (stock) with the stock plates, all that is fine - i saw it.

www.liorzahavi.com

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03-09-2006 09:50 PM  11 years agoPost 8
looseblades

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ocean gate N.J. usa

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wonder why he is having a rubbing problem? any time i have seen this, it was the plates. something has got to off some were.

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03-09-2006 09:55 PM  11 years agoPost 9
Oz Goren

Heliman

Israel

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Thanks for the info guys,

The main issue is the Glitch on the pitch, Lior saw it in action, he was actually flying the Heli when it entered the fale safe - could it be a result of the fan-clutch interaction (metal) through 3D maneuvers generating some interefence ?

Oz

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03-10-2006 01:18 AM  11 years agoPost 10
looseblades

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ocean gate N.J. usa

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if the driver and fan are rubbing in flight, it will cause glitching in the form of rf interfearance.

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03-10-2006 09:23 AM  11 years agoPost 11
I3DM

rrProfessor

Israel

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I asked beast about his post and this is what he said:

Hi I3DM

because of the way the sratus is designed, the clutch and fan assembly flexes in flight tapping to the fan hub and thats where the noise comes from.

.Beresford

www.liorzahavi.com

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03-10-2006 12:37 PM  11 years agoPost 12
Oz Goren

Heliman

Israel

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Ok, I measured the clutch assembly and find out 0.5 mm deviation from my other Helis, this comes pre-assembeled in the kit (thanks for the advice Lior)

I also noticed this flexibility of the entire frame in a way allowing the clutch and fan gap to change through 3d maneuvers.

So, I added 0.5 carbon shim between the bottom frame carbon plate and it's 2 alluminium supports - the gap now is perfect.

Hopefully this will solve the Glitch problem, will check tomorrow.

Oz Goren

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03-11-2006 04:17 PM  11 years agoPost 13
Oz Goren

Heliman

Israel

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So far so good, 2 flights, for now it is Ok

This is an Alert for everyone who fly Fury - 0.5mm difference in the Gap between the Fan and the Clutch is critical !

Make sure you have 1mm gap, especially on the Stratrus due to the flexibility of the frame (Engine plate to top section)

If it is too close, it will touch metal to metal in 3d maneuvers and the 15000 RPM of the engine generates noise that will effect the receiver.

Oz Goren

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03-11-2006 05:20 PM  11 years agoPost 14
rotoryrob

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Auburn WA

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Wow that was some good information.. i just finished putting my cspec in and like yours there is little or no gap at all. I was thinking what a tight fit.. not even thinking about the vibration or rubbing of the two metals. Where did you place the .5mm shim?

Rotoryrob

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03-11-2006 06:23 PM  11 years agoPost 15
Oz Goren

Heliman

Israel

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I put it between the large thick carbon bottom plate (engine mount)and the two metal stands that connect it to the top frame. Made out of two pieces of thin carbon cut from a brocken MAH blade (0.6 mm thick) - size is 50x13mm and two 3mm holes for the screws.

Oz

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03-11-2006 06:25 PM  11 years agoPost 16
rotoryrob

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Auburn WA

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Thanks for your information.. may of just saved my ship...

Rotoryrob

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HelicopterMiniature Aircraft Whiplash & Fury 55 › Stratus assembly - fan too tight with clutch, cause Glitch ?
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