The VULTURE 3.5 (3500) by Skip Miller Models, build thread. - Page 5 - RC Groups
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Feb 05, 2011, 05:39 PM
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kilwein's Avatar
Hi Fnnwizard,

The control arms are all preinstalled. The hole in the arm is just forward of the hinge line. I have to move the servo's full forward to eliminate-mimimize the servo case hitting the servo cover. Need a real slim servo for the wing or have the servo stick up and out a bit.

Up and down aileron to servo movement is pretty close right now, but does have a little more down than up. The servo arm in the picture is not at 0 degrees, it was moved during handling. Using Hanger 9 Angle Pro Inclinometer and Hitec HFP-20 for testing. For the same pulse width movement both ways it is 9.4 degrees up, 0 degrees center and 10.6 degrees down.

Servo's are not glued in yet, I will give thoughts to your idea-suggestion.

This build thread is to show and discuss the plane details along with me and others learning something new.
Any and all comments are welcome.

Appreciate your idea-comments,

Originally Posted by fnnwizard
Kilwein, Nice job so far. Just one area I think you can improve upon. The ail control arm, for best results, the hole for the clevis should line up with the hingeline more in the vertical axis if you are going to mount the servo more towards the leading ede.
If you drew a line from the hingline to the ail arm clevis hole, that line should be close to 90 degrees with the control rod for optimum performance.
It looks like the ail arm is already glued in , so I would recommend mounting the servo more towards the trailing edge and block it with some ply to tie it into the spar.
From the looks of it right now, you will get more down te than up te for the same amount of servo throw each direction and it will be more prone to flutter when you are in reflex.
Try to get at least 2:1 servo throw/ail throw relationship. 3:1 even better.

Thanks for taking the time to show us your build!

This is for strong winching/f3j towing.
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Feb 05, 2011, 11:57 PM
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kilwein's Avatar
Flap servo installation was a breeze using Skip Miller Model servo trays.
Find spot to install servo, mark it, Rough up surfaces first on both wing and servo tray, install tray with epoxy glue, let dry and install servo with linkage on. Didn't think I would say this but, the servo trays are worth the cost for the time saved during install and easy removal of servo later if needed.
Last edited by kilwein; Feb 06, 2011 at 12:17 AM.
Feb 06, 2011, 07:22 PM
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kilwein's Avatar
Working the center connector to tip connector.
A quick jig cutout and some tape and ready to go. Made the cut ~1/8in from bottom of wing skin. Needed to add a little spacer material between connector and bottom of wing skins, (bottom of wing then spacer material then connector all glued together). Just move the jig from one to the other side. I used the spar vertical edge as a zero point for the jig so the connectors lined up.

Edit: Added R & L side pictures after glue dried.
Last edited by kilwein; Feb 06, 2011 at 11:45 PM.
Feb 06, 2011, 07:57 PM
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Feb 08, 2011, 12:32 AM
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kilwein's Avatar
We had a cub scout meeting tonight so not much done.
Got the aileron servos in, servo covers taped in and completed.
The complete fuse, wing wire harness and all (center-tip) connectors are now fully tested and working.
Showing the bottom aileron tip servo covers on both sides.
They have a slight bulge in with the Hyperion DS13TMG's, hopefully you can see in the pictures, very slight. A slimmer servo would eliminate the slight bulge.
I am now cycling the battery pack, a 1500mah, 2/3c 5cell going in.
Now to machine the ballast bar in the next couple days.
Have to stop by the gun store for some lead shot, getting close.
Will start programming the 14mz in-between other activities.
Last edited by kilwein; Feb 08, 2011 at 12:38 AM.
Feb 08, 2011, 01:27 PM
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Did you use mounts for the DS-13s??
Feb 08, 2011, 01:40 PM
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kilwein's Avatar
Made wood mount.

Originally Posted by Bobalew
Did you use mounts for the DS-13s??
Feb 08, 2011, 07:26 PM
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Beautiful sailplane!
Feb 08, 2011, 09:40 PM
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kilwein's Avatar
Thank you, I can only take credit for putting it together (good or bad), not the design, Skip Miller Models takes that credit.

Originally Posted by Frank Stickle
Beautiful sailplane!
Feb 08, 2011, 10:31 PM
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kilwein's Avatar
Here are some more pictures of the completed individual weights of the parts separately. All parts-components are installed except battery pack and lead to balance.

Needs ~4-5 oz's of lead, rough check so far at 95mm.
Have to get to the gun store to get lead shot.
Lateral balance is good as is.
Feb 10, 2011, 01:30 PM
Craig B
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Hey Tony!, it looks much more complete than the day you picked it up! Don't forget your tails when you go to the field this time! great job on the build! Make sure Joe videos your first few flights! I think you're going to like this one..
Feb 10, 2011, 03:32 PM
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kilwein's Avatar
Hi Craig,

I think it is a keeper and sharp looking too.
Itching to get it out soon but the weather sucks right now.
Got 1lb of buckshot this morning so some is going in the nose tonight and it will be ready to go for the maiden flight after I finish programming the tx.
Feb 10, 2011, 03:47 PM
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Hey Tony,

let me know when you were planning to maiden it. The weekend looks pretty good.

Feb 10, 2011, 06:42 PM
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laryctdummy's Avatar
I wouldnt look for it this weekend. It has to play "hangar queen" in Phoenix first.

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