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HeliTorque Forum Index

Search found 35 matches
Author Message
  Topic: DARPA/NASA Ames, Small entities & Morphing airframes
davh72

Replies: 40
Views: 34063

PostForum: Announcements & Comments   Posted: Sun Aug 19, 2012 9:24 pm   Subject: DARPA/NASA Ames, Small entities & Morphing airframes
Airframe hit the ground from 15 feet....airframe was more rugged than I had expected. The combination adhesive with carbon fiber gusset plates was a good choice on my part. The battery/yaw control pla ...
  Topic: DARPA/NASA Ames, Small entities & Morphing airframes
davh72

Replies: 40
Views: 34063

PostForum: Announcements & Comments   Posted: Sun Aug 19, 2012 8:18 pm   Subject: DARPA/NASA Ames, Small entities & Morphing airframes
First outdoor flight. i used a cheap tranmitter and receiver, so it's still not as good as I would like for it to be regarding stable hover.

Dave

[youtube]http://www.youtube.com/watch?v=Gop78ubN ...
  Topic: DARPA/NASA Ames, Small entities & Morphing airframes
davh72

Replies: 40
Views: 34063

PostForum: Announcements & Comments   Posted: Wed Aug 15, 2012 5:01 pm   Subject: First Controlled flight: 2nd proto HIR Coaxial
[youtube]http://www.youtube.com/watch?v=fV_Uuo8J_DA




This effort is not an attempt to replace any UAS. It is simply an update on my approach/effort to civil UAS and manned platforms. I am sti ...
  Topic: DARPA/NASA Ames, Small entities & Morphing airframes
davh72

Replies: 40
Views: 34063

PostForum: Announcements & Comments   Posted: Mon Nov 21, 2011 11:11 am   Subject: DARPA/NASA Ames, Small entities & Morphing airframes
I've been working with a frenzy trying to finish my wife's chair and end table along with my project. Got everything loosely put together yesterday and something on the bottom of the motor burnt out, ...
  Topic: DARPA/NASA Ames, Small entities & Morphing airframes
davh72

Replies: 40
Views: 34063

PostForum: Announcements & Comments   Posted: Sun Oct 23, 2011 9:56 pm   Subject: DARPA/NASA Ames, Small entities & Morphing airframes
I made significant changes to the airframe to lower the center of gravity. Both electric motors are still good. Still trying to track down a suitable mixer/speed controller. When I first started this ...
  Topic: DARPA/NASA Ames, Small entities & Morphing airframes
davh72

Replies: 40
Views: 34063

PostForum: Announcements & Comments   Posted: Thu Oct 06, 2011 9:21 pm   Subject: DARPA/NASA Ames, Small entities & Morphing airframes
Powered down the battery to recharge. Mixer burnt out. No TR. New parts ordered. What can I say....Murphy.

Dave

[youtube]http://www.youtube.com/watch?v=Ll-RGeUF0BM

[/youtube]
  Topic: DARPA/NASA Ames, Small entities & Morphing airframes
davh72

Replies: 40
Views: 34063

PostForum: Announcements & Comments   Posted: Mon Sep 26, 2011 7:25 pm   Subject: DARPA/NASA Ames, Small entities & Morphing airframes
Blade balance

Dave

[youtube]http://www.youtube.com/watch?v=o96vRd3wTv8&feature=related[/youtube]
  Topic: DARPA/NASA Ames, Small entities & Morphing airframes
davh72

Replies: 40
Views: 34063

PostForum: Announcements & Comments   Posted: Mon Sep 26, 2011 7:24 pm   Subject: DARPA/NASA Ames, Small entities & Morphing airframes
2nd spin up, blade balance etc.

Dave

[youtube]http://www.youtube.com/watch?v=GVMaa4puRo4&feature=related

[/youtube]http://www.youtube.com/watch?v=o96vRd3wTv8&feature=related
  Topic: DARPA/NASA Ames, Small entities & Morphing airframes
davh72

Replies: 40
Views: 34063

PostForum: Announcements & Comments   Posted: Mon Sep 26, 2011 7:17 pm   Subject: DARPA/NASA Ames, Small entities & Morphing airframes
I had forgotten that there are a handful of considerations when scaling down or up between small and full scale. One of those being airframe mass. Most RC helos have rigid hubs and utilize blade bendi ...
  Topic: DARPA/NASA Ames, Small entities & Morphing airframes
davh72

Replies: 40
Views: 34063

PostForum: Announcements & Comments   Posted: Mon Aug 29, 2011 11:35 pm   Subject: DARPA/NASA Ames, Small entities & Morphing airframes
4th servo actuation with the changes. Small adjustments here and there. Lower mast bearing mount changed from doubling as the upper motor mount to now being the lower motor mount/lower mast bearing. C ...
  Topic: DARPA/NASA Ames, Small entities & Morphing airframes
davh72

Replies: 40
Views: 34063

PostForum: Announcements & Comments   Posted: Sun Aug 28, 2011 12:07 am   Subject: DARPA/NASA Ames, Small entities & Morphing airframes
Upper mast bearing mounted; a few small changes need to be made; not using a power train from the motor to the reduction gear because the couplings are too long.

Dave



[youtube]http://www.y ...
  Topic: DARPA/NASA Ames, Small entities & Morphing airframes
davh72

Replies: 40
Views: 34063

PostForum: Announcements & Comments   Posted: Fri Aug 26, 2011 8:36 pm   Subject: DARPA/NASA Ames, Small entities & Morphing airframes
New mast bearings in. A bit more work to do this week-end.

Regards,

Dave
  Topic: DARPA/NASA Ames, Small entities & Morphing airframes
davh72

Replies: 40
Views: 34063

PostForum: Announcements & Comments   Posted: Wed Aug 24, 2011 8:55 pm   Subject: DARPA/NASA Ames, Small entities & Morphing airframes
Back from con-leave. They took the cast off yesterday, but I still walk like a pirate. Within 3 weeks I should have updates and hopefully a 2nd flight test. I'm behind, need new rotor blades, attach m ...
  Topic: DARPA/NASA Ames, Small entities & Morphing airframes
davh72

Replies: 40
Views: 34063

PostForum: Announcements & Comments   Posted: Thu Aug 04, 2011 7:18 pm   Subject: DARPA/NASA Ames, Small entities & Morphing airframes
temp site until the other one gets up and going.

http://envisionrotorsystems.blogspot.com/

Motor mounted to lower mast bearing mount

Dave[/img]
  Topic: DARPA/NASA Ames, Small entities & Morphing airframes
davh72

Replies: 40
Views: 34063

PostForum: Announcements & Comments   Posted: Fri Jul 29, 2011 6:07 pm   Subject: DARPA/NASA Ames, Small entities & Morphing airframes
My web site is down until I find another provider. I have found one and it should be up in a couple of weeks. Had surgery; in the process of recovering. Too many years in the Infantry. You can track t ...
 
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