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mlp3028 · 07-21-2015, 03:22 PM

I installed the I2RC Boom Mount and the alignment is off. The old mount was OK. Any ideas on what the challenge is and how to fix it?

Thanks HF!

Kap'n Krunch · 07-21-2015, 06:27 PM

fly it

Gladius · 07-22-2015, 07:19 AM

I checked mine last night, and the gears are lined up. Did you use any shims in that gear?

mlp3028 · 07-22-2015, 05:23 PM

Now looking for shims in the CNC Boom Mount.

mlp3028 · 07-22-2015, 05:24 PM

Quote:

Originally Posted by Gladius

I checked mine last night, and the gears are lined up. Did you use any shims in that gear?

I did not use any shims

Gladius · 07-23-2015, 10:39 AM

Did you use the spacer between your OWB and main gear?

Alex M K · 07-23-2015, 10:47 AM

meh....don't worry...its fine...just go fly it..

I have had Trex500s for years and years and only a few times, did the lower gears actually aligned well with the tail gears...even with the original gears and all! It's a hit and miss with them helis.

One thing I have noticed, it's actually getting worse with the newer models they come up.

The most recent Trex 500L its so bad it's scray....you should see how bad it is .it still flies good...don't worry

Kind regards

Alex

PS, no I do not forget to install shims, spacers and what not...they are simply badly sized!

Kap'n Krunch · 07-23-2015, 05:52 PM

Quote:

Originally Posted by Alex M K

meh....don't worry...its fine...just go fly it..

I have had Trex500s for years and years and only a few times, did the lower gears actually aligned well with the tail gears...even with the original gears and all! It's a hit and miss with them helis.

One thing I have noticed, it's actually getting worse with the newer models they come up.

The most recent Trex 500L its so bad it's scray....you should see how bad it is .it still flies good...don't worry

Kind regards

Alex

PS, no I do not forget to install shims, spacers and what not...they are simply badly sized!

same on my 500 and 550

Alex M K · 07-23-2015, 06:07 PM

BTW...this is my 500L, when it was brand new, with stock gears ...see how bad it is?

Has hundreds of flights...now runs a 90Amp Kobi at 3200 / 3300RPM HS, BK servos, Scorpion 1600KV motor, Spartan FBL 8.2V and nothing happens to it...just fly it...

Kind regards

Alex

Mateyhv · 07-24-2015, 03:00 AM

The missalignement is not bad at all and is typical for the 500. Mine esp has it with all original parts.

mlp3028 · 07-24-2015, 10:28 AM

Thanks to all for the assurances that the mis-alignment can be a normal thing and I can fly.

I contacted Bob at I2RC and he said the CNC boom mount "should" also have a couple of washers in the bottom of the vertical gear/shaft in a normal setup.

I am going to check that also. I'll report what I find.

mlp3028 · 07-25-2015, 05:09 PM

Quote:

Originally Posted by Gladius

Did you use the spacer between your OWB and main gear?

Today I pulled the main gear apart and the washer is in there, thanks!

mlp3028 · 08-05-2015, 09:28 PM

Quote:

Originally Posted by mlp3028

Thanks to all for the assurances that the mis-alignment can be a normal thing and I can fly.

I contacted Bob at I2RC and he said the CNC boom mount "should" also have a couple of washers in the bottom of the vertical gear/shaft in a normal setup.

I am going to check that also. I'll report what I find.

Well, these are small dish washers that sit back-to-back on the tail rotor gear in the CNC Boom Mount. Bob from I2RC was kind enough to provide a few and it made the difference. There seems to be a vertical pre-load provided by the double convex washers lifting the gear set and providing the alignment.

Relisys190 · 08-06-2015, 08:54 AM

The i2 boom block should have come with two small "spring washers" that go below the tail drive gear if i remember correctly. I havn't disassembled mine in a while but can check tonight when i get home. Pretty sure my gear lines up correctly.

Either way, you look like you'll be fine as is.

Does the tail drive gear move up and down?

Relisys190 · 08-06-2015, 08:55 AM

Quote:

Originally Posted by mlp3028

Well, these are small dish washers that sit back-to-back on the tail rotor gear in the CNC Boom Mount. Bob from I2RC was kind enough to provide a few and it made the difference. There seems to be a vertical pre-load provided by the double convex washers lifting the gear set and providing the alignment.

Looks like you got it. Enjoy the boom block, it's a work of art!

mlp3028 · 08-06-2015, 04:45 PM

Quote:

Originally Posted by Relisys190

Looks like you got it. Enjoy the boom block, it's a work of art!

Thanks, it is a good looking addition. Looks like gear changes may be easier also. Thanks for the help HF

07-21-2015, 03:22 PM	#1 (permalink)
mlp3028 Registered Users Join Date: Sep 2011 Location: Austin, Texas	Trex 500 Gear Alignment I installed the I2RC Boom Mount and the alignment is off. The old mount was OK. Any ideas on what the challenge is and how to fix it? Thanks HF! Attached Thumbnails __________________ P 700 EVO, XLP Nimbus 550, P 380 EVO, Futaba ,YGE-T, neXt and Heli-X *Loud, sudden noises in a helicopter, WILL get your undivided attention*

07-22-2015, 07:19 AM	#3 (permalink)
Gladius Registered Users Join Date: Nov 2012 Location: Maryland	I checked mine last night, and the gears are lined up. Did you use any shims in that gear? __________________ <> Trex 600 ESP FBL, Trex 500 ESP FBL, Gaui X3, Oxy 3 <> <> Builds in progress: Logo 600SX, Synergy 516 <> *Spartan Vortex VX1e*

07-22-2015, 05:23 PM	#4 (permalink)
mlp3028 Registered Users Thread Starter Join Date: Sep 2011 Location: Austin, Texas	Now looking for shims in the CNC Boom Mount. __________________ P 700 EVO, XLP Nimbus 550, P 380 EVO, Futaba ,YGE-T, neXt and Heli-X *Loud, sudden noises in a helicopter, WILL get your undivided attention*

07-23-2015, 10:39 AM	#6 (permalink)
Gladius Registered Users Join Date: Nov 2012 Location: Maryland	Did you use the spacer between your OWB and main gear? __________________ <> Trex 600 ESP FBL, Trex 500 ESP FBL, Gaui X3, Oxy 3 <> <> Builds in progress: Logo 600SX, Synergy 516 <> *Spartan Vortex VX1e*

07-24-2015, 10:28 AM	#11 (permalink)
mlp3028 Registered Users Thread Starter Join Date: Sep 2011 Location: Austin, Texas	Thanks folks! Thanks to all for the assurances that the mis-alignment can be a normal thing and I can fly. I contacted Bob at I2RC and he said the CNC boom mount "should" also have a couple of washers in the bottom of the vertical gear/shaft in a normal setup. I am going to check that also. I'll report what I find. __________________ P 700 EVO, XLP Nimbus 550, P 380 EVO, Futaba ,YGE-T, neXt and Heli-X *Loud, sudden noises in a helicopter, WILL get your undivided attention*

07-21-2015, 06:27 PM	#2 (permalink)
Kap'n Krunch Registered Users Join Date: Dec 2011	fly it

07-23-2015, 10:47 AM	#7 (permalink)
Alex M K Registered Users Join Date: Oct 2014	meh....don't worry...its fine...just go fly it.. I have had Trex500s for years and years and only a few times, did the lower gears actually aligned well with the tail gears...even with the original gears and all! It's a hit and miss with them helis. One thing I have noticed, it's actually getting worse with the newer models they come up. The most recent Trex 500L its so bad it's scray....you should see how bad it is .it still flies good...don't worry Kind regards Alex PS, no I do not forget to install shims, spacers and what not...they are simply badly sized!

07-23-2015, 06:07 PM	#9 (permalink)
Alex M K Registered Users Join Date: Oct 2014	BTW...this is my 500L, when it was brand new, with stock gears ...see how bad it is? Has hundreds of flights...now runs a 90Amp Kobi at 3200 / 3300RPM HS, BK servos, Scorpion 1600KV motor, Spartan FBL 8.2V and nothing happens to it...just fly it... Kind regards Alex

07-24-2015, 03:00 AM	#10 (permalink)
Mateyhv Registered Users Join Date: Mar 2011	The missalignement is not bad at all and is typical for the 500. Mine esp has it with all original parts.

08-06-2015, 08:54 AM	#14 (permalink)
Relisys190 Registered Users Join Date: May 2011	The i2 boom block should have come with two small "spring washers" that go below the tail drive gear if i remember correctly. I havn't disassembled mine in a while but can check tonight when i get home. Pretty sure my gear lines up correctly. Either way, you look like you'll be fine as is. Does the tail drive gear move up and down? __________________ LINKS * G700c BRAIN2 * T-rex 500 308DUO 450x #429

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