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Home✈️Aircraft🚁Helicoptere-AlignT-REX 500 › G-Force & MicroHeli: Front TT Gear Assy - If you build it, they will come!
06-21-2009 09:01 PM  11 years ago
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Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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G-Force & MicroHeli: Front TT Gear Assy - If you build it, they will come!
G-Force & Microheli - in case you haven't noticed, the Front TT gear assembly is stripping at an unbelievable failure rate. Virtualy every hobby shop on the planet is out of stock for this part. One of my flying friends recently bought 7 of them for himself so he can keep his Trex 500 flying.

Align's failure can once again be money in your pocket!

We want a stronger front gear assy so that the rear assy will fail first. In a tail blade strike, the front TT gears fail, and it is a PITA to replace them. Flying life would be so much better if the rear umbrella gear would fail first.

If you build this front assembly with stronger delrin gears, we will certainly buy them from you.

But then you say what happens when we have bought them all from you and they are no longer failing? Well, while you are ramping up to make the front ones out of delrin (or a stronger platic composite than the rear umbrella gear), also ramp up on making the rear umbrella gear (but out of plastic like it is now).

Then when our rear one fails, we will buy them from you since you were so kind and foresighted enough to make the front ones for us!!!

And we certainly don't want them both to be stronger because then the TT may fail, and we don't want that!

Thank you for your consideration!
The huge Trex 500 community.
Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know
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06-22-2009 09:03 AM  11 years ago
blbills

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Provo, UT

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While I have hundreds of flights on my 500 w/o any gear failures, I would have to agree that a smarter design would be to have the "failure gear" at the back end.

This makes so much sense and I have been talking about it for years. This could be marketable for the entire trex line both electric and nitro. I hate having to remove the gyro and pull the front end of the boom apart every time. What a pain.
Brian
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06-22-2009 09:27 AM  11 years ago
Anthony.L

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Seattle, WA

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There is no guarantee delrin TT gears will strip less then the current gears. Case in point the MicroHeli .7M gear for the T-Rex 700. Everyone thought that would be the answer to the 700 gear stripping issues. The delrin gear ended up stripping just as easy as the stock one. It's only advantage was it was machined instead of molded so it spun truer.

The bottom line is the damage is going to occur closest to the power source.
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06-22-2009 05:22 PM  11 years ago
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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The bottom line is the damage is going to occur closest to the power source.
Well - that kinda makes my point! With the tail gears, the "power source" is at the back near the tail blades when you dig them into the ground.

Yes the microheli delrin main gear is stripping, but that is directly driven by the motor, and there are other issues involved.

I still maintain that for the tail gear drive system, if you make the front gears more durable than the rear, the rear will fail during a tail blade strike.
Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know
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06-22-2009 06:29 PM  11 years ago
Anthony.L

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Seattle, WA

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Well - that kinda makes my point! With the tail gears, the "power source" is at the back near the tail blades when you dig them into the ground.
Wrong, the tail is where the "stop" occurs but the power comes from the front near the motor. Think of like a garden hose that you flick to straighten out, the wave in the hose lessens as it gets farther away because the energy is strongest closest to your hand.
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06-22-2009 07:31 PM  11 years ago
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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Think of like a garden hose that you flick to straighten out, the wave in the hose lessens as it gets farther away because the energy is strongest closest to your hand.
Now that is a smart, cool analogy!
Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know
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06-22-2009 07:46 PM  11 years ago
Anthony.L

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Seattle, WA

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