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T-REX 700 › 102T M1 Helical Autorotation Tail Drive Gear Set​on 700E DFC Pro?
02-20-2017 07:05 AM  9 months agoPost 1
NQNA

rrElite Veteran

USA

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Is the 102T M1 Helical Autorotation Tail Drive Gear Set H70G012XX a new requirement for the 700E DFC Pro? Is there some structural issues with the higher gear ratio with the original parts?

Anyone have any facts on this?

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02-24-2017 03:28 PM  8 months agoPost 2
Richardmid1

rrProfessor

Leeds, England

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The lower gear ratio will put less strain on the gears and reduce vibration when running silly head speeds.

60% of the time, it works every time!

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02-24-2017 04:28 PM  8 months agoPost 3
NQNA

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USA

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Richardmid1

I went ahead and ordered the new "Red" version of the front and rear gears for both of my 600's and my 700. I have not had any problems with the black version of those gears, but I don't want a failure of the black ones. I did have a white version gear fail on my Trex 700 on the OS 1.05. The crash repair bill was very expensive!!

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02-25-2017 05:21 AM  8 months agoPost 4
knightofcarnage

rrElite Veteran

chicago

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Is the 102T M1 Helical Autorotation Tail Drive Gear Set H70G012XX a new requirement for the 700E DFC Pro? Is there some structural issues with the higher gear ratio with the original parts?

Anyone have any facts on this?
On the 700X there was an issue. But I personally think it was cased by miss alignment and tail Boom Mount flexing under load. First Align discontinued 104 auto rotation gear and said the 102 was the replacment. Accept the gear ratio drop so much with 102/23 (4.43) comparted to 104/22 (4.73) or even crazy tail 104/21 (4.95). The 102/23 combo forces you to up your HS by 50 to 75. WHY!!!!.
But shortly after this they patch 700x with Tail Boom Mount Set and the 104 is off the discontinued list and a new 22T red gear is out.

So don't bother with 102/23 unless you want higher HS or might have tail issues.

BTW to fix the aligment issue on 700X you need to put the shim between the top bearing block and the main gear, right on the top of the copper collar and get the new Tail Boom Mount Set.

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02-25-2017 05:36 PM  8 months agoPost 5
NQNA

rrElite Veteran

USA

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Thx knightofcarnage for that information. My 700 is the older DFC version so I guess there is no problem with misalignment.

Do you know if the red material is actually stronger than the original black?

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03-01-2017 09:17 PM  8 months agoPost 6
NQNA

rrElite Veteran

USA

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The new M1 Torque Tube Front Drive Gear Set/22T (H70G001BX) are now available at the Align Trex Store. I have a set on the way. I'm sure other vendors will also have a supply.

http://www.aligntrexstore.com/M1-To...1BX_p_4772.html

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T-REX 700 › 102T M1 Helical Autorotation Tail Drive Gear Set​on 700E DFC Pro?
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