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HelicopterThunder TigerOther › t/b auto tensioner for rappy 30/50
12-07-2004 11:55 AM  13 years agoPost 1
unklpunk

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alberta canada

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does any one make an automatic tail belt tensioner for the raptor 30/50? seems ot would be easy enough to do, spring loaded, or ratcheting setup, even a manual adjustment that was 1 screw for tension adjustment only, could replace the no-load (right) side of the mainframe guide pulley.
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12-07-2004 04:29 PM  13 years agoPost 2
Spitfire_mk5

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Canada

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I would be more interested in a carbon TT conversion myself and do away with the belt altogether.
I hate belt drives! but if an auto-tensioner became availible and it was adjustable to keep the tension i like (mast bendingly tight ) then i can see buying it.

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12-07-2004 06:45 PM  13 years agoPost 3
iflybyu77

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Fort Wayne, IN

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i see a potential problem..

a tensioner sounds good, but you have to make sure then that you have the proper clearance between the tail rotor and the mains.. those with oversized or large tail rotors would get a nasty suprise..

and as far as torque tubes go.. i'd guess that tail rotor contact w/ the ground is much more forgiving with a belt than a torque tube..

... or maybe I can auto worth a crap without tapping the tail ...

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12-07-2004 07:45 PM  13 years agoPost 4
SRH990

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Birmingham, UK

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Do we really need more complexity - cost - more to fail? I'm happy enough checking by hand, at least if its wrong then its my fault

Steve -Trex 700N, Trex 600N, Raptor 550E, 450SE, Mini Titan, Logo 5003D, Beam E4

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12-08-2004 01:20 AM  13 years agoPost 5
gt900uk

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Scotland

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I think it not a case of not checking it would be nice to be able to adjust the tension wihtout having to undo the tail boom bolts pull it tight and do the bolts back up. There must be an easier way...

This Heli Will Self Destruct In Five Seconds!!

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12-08-2004 08:46 AM  13 years agoPost 6
SRH990

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Birmingham, UK

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They use a belt tension checker for auto cambelts, use to check, then stick back in the draw. Maybe something like a spring balance pulling on the tail end of the boom to a preset tension would do the job?

Steve -Trex 700N, Trex 600N, Raptor 550E, 450SE, Mini Titan, Logo 5003D, Beam E4

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12-08-2004 09:28 AM  13 years agoPost 7
Wa11banger

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Huntsville, Al

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The only drawback I can see about an autotensioner system is it takes horsepower away.. I would hate to sacrifice even the tinniest bit of our ever so tiny horsepower to anything extra that is also going to add extra weight


Just my .02
Rick

Proud member of the Quick UK, Duralite Flight Systems, V-Blade, & KBDD team

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12-08-2004 10:25 AM  13 years agoPost 8
Al Magaloff

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12,199 Posts- Enough Time Wasted. See Ya!

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And add weight: Draw Back #2. Sliding the tailboom in or out is pretty simple, fairly easy, costs nothing, adds no weight. Hard to beat.

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12-08-2004 11:52 AM  13 years agoPost 9
gt900uk

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Scotland

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Its just a total pain in the butt Especially as the 4 bolts always seem to need completley undone before they free off the tail boom. Im sorry gues im a lazy S.O.B

This Heli Will Self Destruct In Five Seconds!!

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12-08-2004 12:58 PM  13 years agoPost 10
nojohnny101

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10 miles north of Cincy, OHIO

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hey
i agree....lol lazy SOB....why can't the bolts just slide out once they clear the lock nuts....guess that'd be too easy!

Let me know


Thanks
~Will~

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12-08-2004 05:53 PM  13 years agoPost 11
Al Magaloff

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Plastic!

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12-08-2004 06:51 PM  13 years agoPost 12
nojohnny101

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10 miles north of Cincy, OHIO

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hey
I KNOW!!....don't ya luv it!!!

Thanks
~Will~

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12-10-2004 02:51 AM  13 years agoPost 13
RussS

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Wisconsin

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I have one!

I built one a couple of years ago and it works just fine in hot and cold weather with an aluminum boom. I am on version three with drawings for version four that hasen't been built yet. I do not have any pictures of it and I will not post any. All I will say is that the pulley on the right side of the frame is now moveable.

This project is not as easy as it seems when you have to consider spring tension and where are you going to put everthing so nothing gets caught anywhere. It weighs two to three ounces but the way I fly I will never ever notice the difference. I set my belt tension last summer and haven't touched it since.

Russ S

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12-10-2004 03:11 AM  13 years agoPost 14
unklpunk

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alberta canada

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its a spring loaded setup? I was looking at the frames and thinking about drilling a couple of holes through the frame, in the little channel for the pulley axles, threading these holes, and having bolts slide the axle in and out, there bye adjusting tension.
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12-10-2004 05:04 AM  13 years agoPost 15
Helimex

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Oklahoma

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The fix is easy. Initially adjust the boom to fit your version of the required tension. Drill a small hole through the plastic boom holder and the boom. Insert small screw (careful not to drill where the screw may interfere with the belt). Viola, problem solved. Have never had to adjust my belt tension since.

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12-10-2004 05:24 AM  13 years agoPost 16
Dragonfryer

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Singapore

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Lock Screw for Tail Boom

Hello Helimex,

What size screw did you install to lock the boom holder & boom together?

Presently, I am using the M3 with a nut from the muffler mount running right through the boom holder.

Thank

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12-10-2004 06:01 AM  13 years agoPost 17
Helimex

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Oklahoma

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Screw the tailboom

Don't remember what size screw is in there, but it's a little bitty self tapping job just long enough to penetrate the plastic and the boom. Works great.

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12-10-2004 10:03 AM  13 years agoPost 18
Al Magaloff

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The issue is not locking the tailboom, because the tail boom isn't moving. Temperature difference causes the boom and belt to expand/contract at different rates. Helimex, take your helicopter out of the warm house, into 20 degree weather, tell me you never had a problem. Russ, good going on the design....keep at it!

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12-10-2004 04:47 PM  13 years agoPost 19
Helimex

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Oklahoma

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20 degree weather?

Al, I never fly in 20 degree weather. I'm not that hard core yet. But yes, I agree with you that belt tension may be affected by extreme temp differences. Hasn't happened to me yet. Have not needed to adjust tension in over a year.

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12-10-2004 04:54 PM  13 years agoPost 20
CrashExpert

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Scotland

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never fly in 20 degree weather. I'm not that hard core yet.
Jesus Thats the middle of summer temperatures in Scotland!



Crash
601 Crew Member
Your about to be Cloned!!!!

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HelicopterThunder TigerOther › t/b auto tensioner for rappy 30/50
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