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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Raptor 60/90 Tail drive shafts
12-18-2018 09:02 PM  11 months ago
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MartyH

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USA

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Raptor 60/90 Tail drive shafts
Parts of course are gone for the Raptors. Has anyone been fabricating or has found a suitable substitute for the torque tube driveshaft?
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12-18-2018 10:37 PM  11 months ago
JuanRodriguez

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Quite a few years ago when these machines were popular, we used to make our own drive shafts from aluminum arrow shafts...... The splined ends will come off with some heat and get re-epoxied into the arrow shafts with slow cure JB Weld.....

Sorry I can't remember the specific arrow shaft size as it's been many years since those days but you should be able to take your Raptor shaft into an archery shop and get matched up easily......
Been there, done that and old enough to know better.....
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12-18-2018 11:54 PM  11 months ago
Jeff polisena

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westpalmbeachflorida usa

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Broom handles and arrows , those were the days .I stole it ,flew it and gave it back ;)
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12-19-2018 04:29 AM  11 months ago
ticedoff8

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Morgan Hill, CA. USA

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I'm not 100% sure, but I think the TT for the Raptor 90 G4 is compatible with the old R90.
And they made the G4 as both nitro & electric.
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12-19-2018 11:07 AM  11 months ago
Richardmid1

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Leeds, England

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Easton arrow shafts.60% of the time, it works every time!
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12-19-2018 12:05 PM  11 months ago
JuanRodriguez

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Richardmid1 Easton arrow shafts
Yup, see post #2.
Been there, done that and old enough to know better.....
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12-19-2018 05:11 PM  11 months ago
dialarotor

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Traverse City, Michigan

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2 sources of tail booms R90 on Ebay now, just got one from Korea. Guy in Italy and a few. Also got a torque tube from Virginia hobby shop, still has one more available. Guy in England with complete tail for sale also.RapRexSynLogo Pilot
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12-20-2018 08:42 AM  11 months ago
MartyH

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USA

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Booms are no problem. Driveshafts are the issue. I have a couple that have the screw holding the ends together. I guess if I break those I can source an arrowshaft or something as a replacement. When you guys substituted did you still use the bearing assemblies inside the booms to prevent shaft whip or did you have to come up with alternatives for those as well?
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12-20-2018 12:48 PM  11 months ago
JuanRodriguez

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We used the same bearing assemblies....Been there, done that and old enough to know better.....
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12-21-2018 07:47 PM  11 months ago
John Benario

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Las Vegas

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Arrow shafts are described with a 4 digit number, say 2018. The first two digits is the diameter in 64ths, the second two digits are the wall thickness in thousandths. Do a search on a 2018 arrow shaft for example: 20/64ths OD, 0.018 thick material

Years ago when I was writing for RCM I had an article on how easy it is to make your own drive shafts because arrow shafts are so easy to find and so cheap compared to helicopter pricing.

I don't remember the Thunder Tiger size, but just measure the OD and the thickness with calipers and the numbers will match up very precisely with a commercially made aluminum shaft size. Then just loctite the ends in with Loctite 238 and secure with a 2.6 mm through bolt or whatever the installed design is.
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12-22-2018 04:56 PM  11 months ago
saleenahpilot1

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dayton

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2013 is what use
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12-22-2018 05:00 PM  11 months ago
saleenahpilot1

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dayton

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Here ya go

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12-22-2018 08:57 PM  11 months ago
JuanRodriguez

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The Villages, Florida

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One thing I forgot to mention......

Have them checked at the archery shop for straightness as the tolerances vary.....
Been there, done that and old enough to know better.....
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12-23-2018 07:37 AM  11 months ago
saleenahpilot1

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dayton

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My experience the arrow shafts were always straighter then tt shafts
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12-27-2018 12:00 AM  11 months ago
MartyH

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USA

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JuanRodriguez The splined ends will come off with some heat and get re-epoxied into the arrow shafts with slow cure JB Weld.....
Does anyone have any splined ends or broken driveshafts they don't need laying around? I could use a couple to prep a shaft before it's needed. The aluminum arrow shaft material Easton Platinum Plus in the 2013 size is some very nice quality hard anodized 7075 aluminum.
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