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Old Jul 27, 2010, 07:48 PM
Dan203 is offline
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Discussion

Torque tube vs. belt drive?


I assume there are advantages and disadvantages to each, but I can't seem to find a defensive list of what they are. Most helis sold with both options are about the same price, so there doesn't seem to be a price advantage to either. Can anyone explain the pros and cons of each?

Dan
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Old Jul 27, 2010, 09:06 PM
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The debate continues.
My opinion is the torque tube is the way to go, on a properly designed helicopter.
Downside is if you drag the tail on the ground often, the belt can be more forgiving.
Old Jul 28, 2010, 01:03 AM
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So it sounds like belt drive is more forgiving in a crash. What are the disadvantages? Does it require constant adjustment to maintain proper tension?

I honestly want to know, not debate. I've been flying a lot of small Walkera's for a while and I'm thinking about getting a bigger 450 for outdoors. The cheap HK Trex clones come as either belt drive or torque tube for the exact same price, so I'm confused as to which one to get.

Dan
Old Jul 28, 2010, 02:22 AM
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It really depends I think how confident you are at keeping the tail blades from hitting the ground.

Torque tube gives better power and control to the tail for advanced flying and dosn't have interference issues and what not.

Belt drive allows for more error.
Old Jul 28, 2010, 07:41 AM
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TT= more efficient, faster, more crisp response, but also more fragile. Almost any tr strike will result in stripped gears.

Belt= less efficient than TT or shaft, slightly slower response(usually only noticeable by advanced pilots doing fast maneuvers), but much tougher when it comes to crashes and ground strikes.

Once set up correct, belts require very little maintenance. I check the tension before each session, which requires only a touch. I probably have to re-tension my belts about once every 20 packs.

Belts all the way for me!
Last edited by micronut; Jul 28, 2010 at 07:47 AM.
Old Jul 28, 2010, 07:56 AM
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BTW, I am currently building Shoguns #2 and #3.
#1 is a v2 belt drive which is by far my favorite of all of my helis

#2 will be a direct drive variable pitch tail.#3 will be a torque tube.
I may not got them finished and flown for a while, but that should be the definitive answer.

My money is on ddvp!
Old Jul 28, 2010, 09:18 AM
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There is some belief that belt drive creates a static electric buildup that interferes with the ESC. This is the reason I've heard for why Align came out with the TT drive version 450. I'm with micronut, the DDVP system looks very promising.
Old Jul 28, 2010, 10:50 AM
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I have both and fail to feel a big difference. Then again I'm not advanced. I heard a shot of silicone on the belt does away with any static issues. I've never had any without the silicone though.
Old Jul 29, 2010, 04:00 PM
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Yup, Belt is cheaper in crashes, They survive 90%+ of crashes that take out the boom.
TT will survive nearly 0% of crashes that take out the boom and often you have to replace the front or rear gears even at the slightest hit.

If boom slips at the front mounting block, the belt will slip.
Belt tightness is somethiing people sometimes struggle with.
EVery time I"ve thought I had a static problem, I found another reason for the issue.
I silicone spray my belt every 10-20 flights.
Old Jul 29, 2010, 04:16 PM
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I'm a belt guy, I use dry graphite spray to lube my belts, you need to treat less using grahite but I still spray the belt most maintenance cycles...which is about 25 flites for me.

I'm not a very advanced pilot, flips, loops and rolls, for those I can't tell the difference between belt and TT, if I wack my TT gears I will likely buy the EXI belt conversion for my Pro ....then fix the TT for the next big crash
Old Nov 01, 2016, 08:11 PM
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Yeah, well I counted 10 bearings total to transfer power to the tail. You need to order a bag of 'em if you want to run maintenance on your machine

My 450 belt has 5 bearings.
My 600 had(yes had!) 5. Well, actually 4 that are needed same goes for 450 I guess.

So yeah, twice as many bearings and much more complex transmutation of power to the tail.

Belt? Hah, you just twist it and you have that transmission without all unnecessary gears
Old Nov 01, 2016, 10:18 PM
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This is one of those debates that are never ending, kinda weird responding to a six year old thread though.

Old Nov 01, 2016, 10:46 PM
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Hmm
Right.
I thought wwoodcox was a recent member..

Well, anyways since this one floated our way..
just in the front tail boom box alone, I have 4 bearings that are interesting to get to. I had to remive many bolts, stretch a frame and yank the gear boom box out. Boom holder I think they call it. It's a 700edfc so you get the idea of which heli I'm talking about.

I usually replace my bearings when they get.....ooh, not very often. Never replaced a single bearing on my 459 yet in 3 years and many crashes.

Maybe it's time...
Old Nov 02, 2016, 02:10 AM
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Nice necrobump FP
Old Nov 02, 2016, 07:14 AM
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Old thread, but good info. Something else that may dictate your choice is adding a scale body. Some are designed for TT and some for belt.


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