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Raptor E700 › Tight Torque Tube...?
02-23-2014 04:55 PM  3 years agoPost 1
Ricka1

rrNovice

Waynesboro, PA

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I've pretty much got the air-frame together on my E700 now. I've got a question about the torque tube and boom. I mounted the boom, put in the small screw that retains it, and inserted the torque tube until it was as far into the tail block as it would go. After that, I pulled the torque tube out just a bit, maybe 1mm. I then installed the rear tail drive assembly until the holes lined up. At this point it seems like the torque tube is bottomed out on both ends and the assembly seem really tight. When I turn the head it feels like there is more resistance than there should be. Any thoughts or tips?

Thanks!

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02-23-2014 07:00 PM  3 years agoPost 2
wrongler

rrProfessor

Brewerton, New York

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Was the torque tube free before everything was installed? Maybe a little CA on the bearings in the torque tube?

Bill Whittaker

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02-23-2014 08:03 PM  3 years agoPost 3
Ricka1

rrNovice

Waynesboro, PA

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Yep, everything was spinning freely. It doesn't feel like there is resistance from the tt bearings. It almost seems like the tt is a smidge too long and is pushing on the drive gears at both ends. I've disassembled and reassembled it today and it is assembled as per the instructions. My MD7/8 with helical gears felt kind of the same. I was told that was normal and it'd loosen up when I flew it. When I spin the head without blades it's a little stiff, but spins smoothly. I'll see what happens- I'm wiring it up now and should be able to maiden when the weather clears warms up.

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02-23-2014 08:34 PM  3 years agoPost 4
jongam0

rrApprentice

ft. wayne, in usa

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i noticed on mine that the gears in the tt were not seated all the way in the bearings.

earth ----- my worst obstical

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04-14-2014 04:19 PM  3 years agoPost 5
Daved Gutierrez

rrVeteran

Chicago, IL

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It's been almost 2 months since you asked the question but I had a similar problem to yours and I found that when pushed the torque tube all the way in I also pushed/changed the tail gear mesh and as a result I had a rough spinning torque tube, so for someone with a similar problem definitely check the tail gear mesh in the back and the front as well if adjustable

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04-14-2014 04:59 PM  3 years agoPost 6
Adam Landefeld

rrApprentice

Lehi, UT, USA

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For guys who see this issue after installing the torque tube/boom... you do need sometimes to "seat" the gears on each end of the torque tube after everything is together. This means simply pushing each gear into the bearing/towards the torque tube on the front and rear of the machine. Sometimes the tightness of fit allows the torque tube, when being installed, to kind of wedge those gears further into their spiral cut counterparts. Pressing them back towards the boom relieves this condition. You can often feel them ease back in a half mil or so. I just place a flat screwdriver in between the vertical front/horizontal rear shafts and press back on the flat face of the torque tube gear.

This does require that all the lash and shimming have been setup correctly ahead of time as well.

-Adam

Futaba Factory Team
Team FlightPower
Thunder Tiger

https://www.facebook.com/UtahHeli

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04-14-2014 08:30 PM  3 years agoPost 7
Ricka1

rrNovice

Waynesboro, PA

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Thanks Adam,

I've found now, that everything is buttery smooth. Once I got the blades on and spooled it up a couple of times, everything was great.

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04-14-2014 09:07 PM  3 years agoPost 8
Adam Landefeld

rrApprentice

Lehi, UT, USA

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Glad to hear, now get out there and enjoy that thing, it is amazing. Light, fast, stable!

-Adam

Futaba Factory Team
Team FlightPower
Thunder Tiger

https://www.facebook.com/UtahHeli

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Raptor E700 › Tight Torque Tube...?
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