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equisol · 12-23-2007, 01:43 PM

Most of the T-Rex folks remove the idler tail pulley a if frays the belt.
Anyone doing the same thing on the MX-400 / MX-450 ?

Scottlclem · 12-23-2007, 03:13 PM

Never had anyproblem with the belt on my MX450. I did see a post in the T-rex forum where somone recommended using the MX pully because it has the channel sides and will limit the belt walking.

istandalone · 12-25-2007, 07:50 AM

i took mine off a while back. then this past weekend i put a new belt on her. first flight after the new belt install was very shakey. i could not figure out why, i tried all manner of belt loosen/tightening and no dice. no crashes either, so i know nothing was bent. i put the idler pulley back on and whalla! no vibration! i can't figure it out, but the pulley will stay on from now on.

equisol · 12-25-2007, 08:57 AM

Having read the following thread: https://www.helifreak.com/showthread.php?t=54464
post # 12 from Pinecone, I will leave the pulley on the MX-400, and add a MX-400 pulley back to the T-rex. Had a closer look at the pulleys and yes, the MX-400 has a flange where the T-rex does not. IMO, the MX-400 pulley is properly designed witth the flanges stopping the belt from wandering and fraying.

12-23-2007, 01:43 PM	#1 (permalink)
equisol Registered Users My HF Map location Join Date: Jul 2007	Idler tail pulley Most of the T-Rex folks remove the idler tail pulley a if frays the belt. Anyone doing the same thing on the MX-400 / MX-450 ? __________________ T-REX 450 SE, GY 401, 4x HS 65MG T-REX 450 SE, Logictec 2100, 4x HS65 MX 400 PRO CCPM, Zoom Gyro, 4x HS65 MX 400 CF + CCPM, Copter-X head, GY 401, 4x HS65 Spektrum DX7

12-23-2007, 03:13 PM	#2 (permalink)
Scottlclem Registered Users Join Date: Feb 2007	pully Never had anyproblem with the belt on my MX450. I did see a post in the T-rex forum where somone recommended using the MX pully because it has the channel sides and will limit the belt walking.

12-25-2007, 07:50 AM	#3 (permalink)
istandalone Registered Users My HF Map location Join Date: Aug 2007	i took mine off a while back. then this past weekend i put a new belt on her. first flight after the new belt install was very shakey. i could not figure out why, i tried all manner of belt loosen/tightening and no dice. no crashes either, so i know nothing was bent. i put the idler pulley back on and whalla! no vibration! i can't figure it out, but the pulley will stay on from now on. __________________ AMA# 906249 i'm now down to one heli (align sev2) but have an arsenal of 120+ mph jets. hmm...i think i see a pattern here lol.

12-25-2007, 08:57 AM	#4 (permalink)
equisol Registered Users Thread Starter My HF Map location Join Date: Jul 2007	Having read the following thread: https://www.helifreak.com/showthread.php?t=54464 post # 12 from Pinecone, I will leave the pulley on the MX-400, and add a MX-400 pulley back to the T-rex. Had a closer look at the pulleys and yes, the MX-400 has a flange where the T-rex does not. IMO, the MX-400 pulley is properly designed witth the flanges stopping the belt from wandering and fraying. __________________ T-REX 450 SE, GY 401, 4x HS 65MG T-REX 450 SE, Logictec 2100, 4x HS65 MX 400 PRO CCPM, Zoom Gyro, 4x HS65 MX 400 CF + CCPM, Copter-X head, GY 401, 4x HS65 Spektrum DX7

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