Trex 500 Torque tube tail conversion kit questions:

[PowerDyne]

Sorry if this has been answered elsewhere and I missed it.

I have some questions regarding Align Part Numbers AGNH50092 and AGNH50092A: Trex 500 Torque tube tail assembly. Is there a difference between the two different part numbers I have seen for this tail assembly?

http://www.amain.com/Align-500-Torqu...ioORoC7nXw_wcB

I would suspect that the "A" version has the 36t vertical drive gear and the non-"A" has the 31t. Is this correct? Or is it just some other small revision?

The reason I ask is that I have an ESP airframe, but it is built with an older belted tail. I want to upgrade to Torque tube and add the new pitch slider assembly to my tail. I wanted to know the difference if any that way I know whether or not I have to replace the vertical TT drive gear with a different tooth count. All the Align specifications descriptions I have seen do not mention the vertical drive gear tooth count for either. Since these cost anywhere from $65 to $85 depending on where you get them, It would be helpful to know which tail drive gear spares I would need.

Any help would be appreciated!

[Gladius]

The newer, narrower frame 500 Pros are all torque tube, whereas the older 500s and 500E were belt driven. So I would hazard a guess that the TT conversion kit you linked will work in your ESP. Just to be sure, you could give AMain a call.

[PowerDyne]

Originally Posted by Gladius

The newer, narrower frame 500 Pros are all torque tube, whereas the older 500s and 500E were belt driven. So I would hazard a guess that the TT conversion kit you linked will work in your ESP. Just to be sure, you could give AMain a call.

Thank you for the response.

After looking at the display pictures for the assembly, it does appear to have the correct hexagonal pins for a 500E/ESP's spacing.

I may just get one anyway. If it's the wrong vertical gear I can always change it out.

[TR450ZS]

For the ESP frame you need the 31 tooth setup.

[PowerDyne]

Originally Posted by TR450ZS

For the ESP frame you need the 31 tooth setup.

I understand that. The question was about which TT drive gear comes with the conversion set. Align does not specify. I assume it';s the 31t, but there are two different model numbers of the TT assembly floating around out there: the standard, and the "A" revision.

I wasn't sure if there was a major difference.

*Edit* Just got word back regarding this, and they are one in the same. the A must be just a revision code or something. They are 31T.

[Gladius]

I don't understand how they can be the same, since the boom block needs to be wider for the ESP, etc. doesn't it?

[PowerDyne]

Yes, the boom block is wider on the ESP. The issue with the part number though was just a revision. the parts are the same between the different part numbers. At least that is what I was told.

[Gladius]

OK, I get it now.