High pitched whine

Sonic_BOOMER_SOONER · 08-07-2009, 12:59 AM

This evening while flying my 600NP was making a high pitched, dull whining sound. I think it may have been there all along and my ear is just becoming more discriminating, but I thought I would ask about it. It is barely audible while spooling up, and once airborne you can't really hear it facing the left side of the heli and it's loudest when facing the right side of the heli. Here's how I would best describe it: 75% of the noise from engine, 15% from the blades, and the remaining 10% this high pitched deal.

Normal? I'm halfway through my 4th gallon of 30% Wildcat CY Performance and the engine had 2-3 gallons run though it when I bought it in May. Power and performance are great.

EDIT: There were some plankers at the field and they all said myOS 50 sounded fantastic, but there weren't any heli guys around. I was wondering if a torque tube bearing or something like that might be going out or need lube.

sp1nner · 08-07-2009, 06:44 AM

Sonic_BOOMER_SOONER

I think the sound you are describing must be normal bacause I get/had a similar sound on mine before I crashed it. I would have described the sound as more of a whistle though.

I am running in my new os50 today so if it is the same I will let you know.

aussiemick · 08-07-2009, 07:06 AM

Probably gear noise that you are hearing.
It would be getting swamped out when you are looking at the left hand side of the heli.

Mick

Sonic_BOOMER_SOONER · 08-07-2009, 07:16 AM

...

Mick: I've never paid attention to your signature before!

Sp1nner: you're right, more of a whistle.

aussiemick · 08-07-2009, 07:19 AM

It does manage to sneak past a few for a while

Mick

glen09 · 08-07-2009, 01:39 PM

thats good to know because i too have a pretty new os50 making a high pitch whistling sound. only a gallon and half through the engine

sp1nner · 08-09-2009, 04:35 AM

Yeh, I ran my new one in the other day and got the exact same noise from the start. Must be normal.

duckmansweb · 08-14-2009, 04:14 PM

i dont get it still

haha

Quote:

Originally Posted by aussiemick

It does manage to sneak past a few for a while

Mick

aussiemick · 08-14-2009, 06:24 PM

Once you get a little older it will become apparent what it is.

Mick

Sonic_BOOMER_SOONER · 08-14-2009, 10:18 PM

Does a chipmunk have a tail that big and build damns?

Ahahaha!

08-07-2009, 12:59 AM	#1
Sonic_BOOMER_SOONER Registered Users Join Date: Nov 2008 Location: Richardson, Texas	High pitched whine This evening while flying my 600NP was making a high pitched, dull whining sound. I think it may have been there all along and my ear is just becoming more discriminating, but I thought I would ask about it. It is barely audible while spooling up, and once airborne you can't really hear it facing the left side of the heli and it's loudest when facing the right side of the heli. Here's how I would best describe it: 75% of the noise from engine, 15% from the blades, and the remaining 10% this high pitched deal. Normal? I'm halfway through my 4th gallon of 30% Wildcat CY Performance and the engine had 2-3 gallons run though it when I bought it in May. Power and performance are great. EDIT: There were some plankers at the field and they all said myOS 50 sounded fantastic, but there weren't any heli guys around. I was wondering if a torque tube bearing or something like that might be going out or need lube. __________________ T-Rex 700N, 600NP, 450v2 w/Pro head, 250SE - Blade mCP-X, mCX, mSR x 2, Parkzone F4U Corsair: All on DX7se

08-07-2009, 07:06 AM	#3
aussiemick Registered Users My HF Map location Join Date: Jul 2006 Location: Brisbane Australia	Probably gear noise that you are hearing. It would be getting swamped out when you are looking at the left hand side of the heli. Mick __________________ To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

08-07-2009, 07:16 AM	#4
Sonic_BOOMER_SOONER Registered Users Thread Starter Join Date: Nov 2008 Location: Richardson, Texas	... Mick: I've never paid attention to your signature before! Sp1nner: you're right, more of a whistle. __________________ T-Rex 700N, 600NP, 450v2 w/Pro head, 250SE - Blade mCP-X, mCX, mSR x 2, Parkzone F4U Corsair: All on DX7se

08-07-2009, 07:19 AM	#5
aussiemick Registered Users My HF Map location Join Date: Jul 2006 Location: Brisbane Australia	It does manage to sneak past a few for a while Mick __________________ To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

08-07-2009, 01:39 PM	#6
glen09 Registered Users My HF Map location Join Date: Dec 2008 Location: kent, uk	thats good to know because i too have a pretty new os50 making a high pitch whistling sound. only a gallon and half through the engine __________________ Trex700LE 3G Trex500 3G

08-07-2009, 06:44 AM	#2
sp1nner Registered Users Join Date: Jan 2008	Sonic_BOOMER_SOONER I think the sound you are describing must be normal bacause I get/had a similar sound on mine before I crashed it. I would have described the sound as more of a whistle though. I am running in my new os50 today so if it is the same I will let you know.

08-09-2009, 04:35 AM	#7
sp1nner Registered Users Join Date: Jan 2008	Yeh, I ran my new one in the other day and got the exact same noise from the start. Must be normal.

08-14-2009, 06:24 PM	#9
aussiemick Registered Users My HF Map location Join Date: Jul 2006 Location: Brisbane Australia	Once you get a little older it will become apparent what it is. Mick __________________ To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

08-14-2009, 10:18 PM	#10
Sonic_BOOMER_SOONER Registered Users Thread Starter Join Date: Nov 2008 Location: Richardson, Texas	Does a chipmunk have a tail that big and build damns? Ahahaha! __________________ T-Rex 700N, 600NP, 450v2 w/Pro head, 250SE - Blade mCP-X, mCX, mSR x 2, Parkzone F4U Corsair: All on DX7se

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