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HomeScaleAircraftHelicopterScale Model RC Helicopters Docs  BO-105
07-27-2017 03:39 PM  10 months agoPost 21
ssmith512

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Indianapolis, IN USA

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Does the grub screw go to thru and pinch the tt on the inside while the other is pinching the outside?
No, the grub screw that goes through the hole in the torque tube does not contact the inner wall of the torque tube. It simply is in position to act like a pin.

I am not certain, after learning a lot last night about clamp loads and round stock and grub screws, that my solution is a viable long term solution. So I am going to revisit it.

Steve

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07-27-2017 03:46 PM  10 months agoPost 22
v22chap

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Granger, Indiana

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Steve
You can do rough lathe work that would probably be good enough for the torque tube filler piece with a drill clamped in a vise or a drill press and just a coarse file to get it close and then step down to a smoother file !!

I also have done work with my drill press and a two position moveable vise clamp to actually turn pieces down with a normal lathe bit in that vise .Although I now own a 2K lathe as I kind of got hooked on that part of the hobby

Larry C ----------Bergen R/C helicopters

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07-27-2017 04:04 PM  10 months agoPost 23
doorman

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Sherwood, Arkansas

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Vario??
The aluminum fillers were not supplied with the kit??

PN 17/8 is made for 8mm shafts

Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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07-27-2017 04:06 PM  10 months agoPost 24
Phoenix NOTAR

rrApprentice

Tallahassee, Florida USA

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Stan,

Steve is using the T-Rex mechanics/tail setup.

Sandy

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07-27-2017 04:50 PM  10 months agoPost 25
doorman

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Sherwood, Arkansas

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Got It!!!
Thanks Sandy, that answered my question!!

Still could order the fillers to cure the problem though!!

Stan

Steve, I can bring a pair to IRCHA if you like and just replace them when you order again... Let me know...

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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07-27-2017 09:30 PM  10 months agoPost 26
antja

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Levin new zealand

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if it is an 8mm align torque tube a piece of standard 6mm rod will slide inside just a bit of 5 minuet epoxy and you are done I have just done 2 tail drives exactly the same way with Align tubes and Vario gear boxes.

Tony.

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07-27-2017 10:17 PM  10 months agoPost 27
ssmith512

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Indianapolis, IN USA

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if it is an 8mm align torque tube a piece of standard 6mm rod will slide inside just a bit of 5 minuet epoxy and you are done I have just done 2 tail drives exactly the same way with Align tubes and Vario gear boxes.
Fantastic! I think I have some 6mm rod at home. I will check later. Thanks for the info!

Steve

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07-27-2017 11:55 PM  10 months agoPost 28
antja

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Levin new zealand

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Just do not let the grub screw go through the hole you have drilled turn it so it clamps at another point.

Tony.

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07-28-2017 06:26 PM  10 months agoPost 29
hrc37

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Derry, PA

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NATS!
Hey Steve, you still have 3 days to get this ready for the NATs!

Mark

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07-28-2017 07:04 PM  10 months agoPost 30
ssmith512

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Indianapolis, IN USA

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NATS!
Hey Steve, you still have 3 days to get this ready for the NATs!
Mark
If rotor head and blades show up today or tomorrow, I'LL BE THERE!

BUT - I ordered them from Vario, so I might be lucky and get them by the time Nats 2018 rolls around! So dont hold a spot for me this year . LOL!

Steve

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07-29-2017 09:54 PM  10 months agoPost 31
ssmith512

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Indianapolis, IN USA

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Rollin' along.......

Boom be bonded....
20170728_190628 by Steve Smith, on Flickr

Rear former and torque tube locator bonded in place.....
20170729_152305 by Steve Smith, on Flickr

Quick overall view. Fuse with woodwork in place is surprisingly light.....
20170728_190651 by Steve Smith, on Flickr

Getting the horizontal stab end plates glued in place. And because I am an anal retentive goof, I am using a square to ensure they are at 90 degrees.....
20170729_152324 by Steve Smith, on Flickr
20170729_152316 by Steve Smith, on Flickr

And am redoing my torque tube to claw connections. Stated by gluing some 1/4" aluminum solid rod into the torque tube ends. Hysol fills in every nook and cranny. Will end up filing a small flat in the torque tube and only using one set screw to fix the claw connector to the torque tube.....
20170729_152415 by Steve Smith, on Flickr

Tomorrow I work on getting the raised tail short torque tube and drive glued in place. Then she gets stuffed into the trailer for the road trip to IRCHA.

Steve

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07-29-2017 10:29 PM  10 months agoPost 32
antja

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Levin new zealand

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best not to file a flat on the torque tube the grub screws will bite into the aluminium and be quite sufficient.the tube is already weak enough with that hole drilled in it, the claw connector should have and needs 2 grub screws.
Tony.

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07-31-2017 12:33 AM  10 months agoPost 33
ssmith512

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Indianapolis, IN USA

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Not much of an update. Did more flying today than building. Cant do much until the hysol dries anyway.

Bonding the raised tail boom in place along with the wood former that adds some rigidity to the raised tail section.
20170730_140154 by Steve Smith, on Flickr
20170730_140207 by Steve Smith, on Flickr

Also got the TX programmed with the default settings for the maiden. ESC is programmed, governor is set to 1200rpm for the first flight. Hoping that will be a good speed for the 4 bladed head and some aggressive "canyon carving" flying.

Still waiting for Vario Germany to ship me the 4-blade head, swash, and main blades I ordered a couple of weeks ago. Was hoping to get them in time for IRCHA, but doesnt look promising. Oh well, they will get here when the get here.

Steve

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07-31-2017 03:50 AM  10 months agoPost 34
JurassicJet

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WI

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I am interested in what hysol you are using. Where do you purchase yours? I need to have some on hand in my shop.

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07-31-2017 03:58 AM  10 months agoPost 35
ssmith512

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Indianapolis, IN USA

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Loctite 9462. I get it from mcmaster.com.

Steve

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07-31-2017 04:12 AM  10 months agoPost 36
JurassicJet

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WI

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Awesome. Thank you. I live in an area that if I order from McMaster Carr by 4:30-ish in the evening I get it the following morning by 10am.

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07-31-2017 01:25 PM  10 months agoPost 37
ssmith512

rrKey Veteran

Indianapolis, IN USA

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I live in an area that if I order from McMaster Carr by 4:30-ish in the evening I get it the following morning by 10am.
Dang! That would be nice!

Steve

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08-13-2017 09:37 PM  10 months agoPost 38
ssmith512

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Indianapolis, IN USA

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OK, back from an AWESOME IRCHA, so it's time to get this bird ready for Dalton.

Rear stabs glued in place...
20170813_153151 by Steve Smith, on Flickr

Rotor head installed. Added some turnbuckles for the pitch rods. FBL system and pitches all set up....
20170813_153202 by Steve Smith, on Flickr

Castle Talon 120 w/fan installed and programmed. Castle governor set to 1200rpm at 93%. Added an e-fuel gauge telemetry sensor to monitor mAh usage. Good to go....
20170813_153220 by Steve Smith, on Flickr

Big 'ole X-Nova 300kV motor installed.....
20170813_153334 by Steve Smith, on Flickr

Added a shaft connector to the tail pushrod. This will allow me the ability to remove the entire tail boom/torque tube assembly for future maintenance. Access to the rudder servo ball link is impossible with the mechanics mounted in the fuse......
20170813_153517 by Steve Smith, on Flickr20170813_153623 by Steve Smith, on Flickr

ESC programmed, FBL programmed, TX programmed with base settings, tail drive system sorted out. Will be ready for some test flights at Dalton in a few weeks, unless less I get impatient and get some air under the skids before then!

Steve

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08-28-2017 12:52 AM  9 months agoPost 39
ssmith512

rrKey Veteran

Indianapolis, IN USA

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Maiden!!!

1200 head speed. Using 115mm tail blades. All in all a successful maiden.
Need to tune out some sensitivity. I like doing all my maidens over water. It kicks the level of anxiety up a bit!

Watch at YouTube

Steve

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08-28-2017 05:06 AM  9 months agoPost 40
TailKiller

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Panama City, FL

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Very nice man, and smooth. Your take offs are impressive. It really seems to like 1200. Staying tuned in.

,Dennis
http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

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