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T-REX 450 › wobble on spool down
10-14-2010 08:14 AM  8 years agoPost 1
RcFreek

rrApprentice

Mombasa,Kenya

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My 450pro wobbles back n forth when i spool down. what could be the probable causes?

My LHS owns me!!!

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10-16-2010 01:39 AM  8 years agoPost 2
KCinNC

rrApprentice

Mooresville, NC

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how about when it spools "up" ? does it wobble then ?

nothing to it but to do it

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10-16-2010 12:20 PM  8 years agoPost 3
ch-47c

rrElite Veteran

san jose, ca

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Low rotor rpm.

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10-16-2010 03:18 PM  8 years agoPost 4
neilg.

rrVeteran

north of borston

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i see a slight wobble also when spooling down. no problems spooling up though.

In Nomeni Patri Et Fili Spiritus Sancti

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10-16-2010 06:33 PM  8 years agoPost 5
red_z06

rrProfessor

Dumont, NJ

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This will happen with damper hardness grade. The wobble rpm will go down with softer damper and also go up respectively.

The important thing is to that it does not occur at your intended RPM.

If it does, you can either up the rpm or lower the hardness.

www.JustinJee.com

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10-16-2010 10:44 PM  8 years agoPost 6
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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If you are setting on a hard surface such as concrete, the wobble will become much greater. I have seen this wobble turn into ground resonance with scary results.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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10-18-2010 02:43 AM  8 years agoPost 7
WATCH-THIS!

rrVeteran

NW Michigan. Rotor Rebels

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Blades too tight in the grip?

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10-19-2010 07:16 AM  8 years agoPost 8
RcFreek

rrApprentice

Mombasa,Kenya

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i ws using a 13T pinion. I switched over to 14T and loosened the blade grips so the prob seems to hv vanished. It seems to be due to low RPM and tight blade grips.

My LHS owns me!!!

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10-21-2010 01:17 AM  8 years agoPost 9
KCinNC

rrApprentice

Mooresville, NC

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good deal !

nothing to it but to do it

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