Notices
RC Gliders, Sailplanes and Slope Soaring Discuss rc gliders,rc sailplanes and slope soaring in this forum. Thermaling techniques, airfoils, tips, etc

Bird of time

Old 03-13-2011, 09:12 AM
  #1  
Member
Thread Starter
 
Join Date: Jul 2004
Location: Suffern, NY
Posts: 89
Likes: 0
Received 0 Likes on 0 Posts
Default Bird of time

I want to build an electric arf bird of time any suggestions for the power battery and esc
thanks all..
Old 03-13-2011, 12:52 PM
  #2  
Junior Member
 
Join Date: Feb 2004
Location: Kingwood, TX
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Bird of time

I am planning to do the same thing, that is, build the Bird of Time kit. I have never been a fan of the ARF's but I'm certain they must save lots of building time. Regarding the power system, I plan to take the finished product to a person who weighs the plane and recommends the ESP and motor for the weight. When I get to that point in time I will advise you and in the meantime if you get there first you can let me know.

Pinecone53
Old 03-13-2011, 02:47 PM
  #3  
My Feedback: (5)
 
AmishWarlord's Avatar
 
Join Date: Oct 2002
Location: Indian Trail, NC
Posts: 2,939
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Bird of time

I have the plans for one. Though I'm going to heavily bash it though into a pusher engine with a V tail.

I'm going with this system but keep in mind that my prop size is limited so I have to run more RPM's at the loss of some efficiency. If your nose mounting heck swing a folding 24"

Electric Bird of Time

Weight 4.9 pounds
Wing Loading 10.5oz square foot
Wing span 118

Motor 38mm X 48mm 1100kv
4S 14.8v 3,500mah lipo
40 amp ESC
11x4 prop 12,210 RPM 5.8 pounds static thrust 46.2mph prop speed 532 watts at 35.9 amps.





Old 03-13-2011, 04:30 PM
  #4  
My Feedback: (8)
 
planebuilder66's Avatar
 
Join Date: Nov 2003
Location: Middletown, CT
Posts: 2,786
Likes: 0
Received 1 Like on 1 Post
Default RE: Bird of time

I guess it really depends on how you want it to look, if you want to keep the nose clean and use a spinner, use a motor that fits within and changing the front profile to suit. If you don't care if the motor is exposed then any good outrunner will do with a folding prop. The problem is the fuselage, there is very little room inside for li-po's and esc.
Old 03-15-2011, 12:38 PM
  #5  
 
KiwiKid's Avatar
 
Join Date: Feb 2005
Location: Hamilton, NEW ZEALAND
Posts: 181
Likes: 0
Received 1 Like on 1 Post
Default RE: Bird of time

Here's a vid of the maiden flights of my BoT built from plans - specs are at the beginning of the vid:

[link]http://vimeo.com/16199913[/link]
Old 03-15-2011, 02:46 PM
  #6  
Member
Thread Starter
 
Join Date: Jul 2004
Location: Suffern, NY
Posts: 89
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Bird of time

Very nice looks like it flys like a dream
Old 03-15-2011, 11:16 PM
  #7  
My Feedback: (5)
 
AmishWarlord's Avatar
 
Join Date: Oct 2002
Location: Indian Trail, NC
Posts: 2,939
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Bird of time

Yeah that extra weight looks like it helps out a lot with landings. I was going to ad these expensive spoilers to mine because the BOT has a tendency of not wanting to land but maybe the extra weight and the drag from the wing struts will be enough.

http://www.hobby-lobby.com/teck_spoi...ueryId=1242450

Attached Thumbnails Click image for larger version

Name:	Sp45312.jpg
Views:	66
Size:	49.4 KB
ID:	1579472  
Old 03-16-2011, 05:58 AM
  #8  
My Feedback: (8)
 
planebuilder66's Avatar
 
Join Date: Nov 2003
Location: Middletown, CT
Posts: 2,786
Likes: 0
Received 1 Like on 1 Post
Default RE: Bird of time

I added spoilers to mine, 3 bays long and 1&1/4" trailing edge stock, operated by 2 micro servos at the root of the wing via a pair of kevlar cables inside the small .030 sulivans cable tube. I have yet to finish covering it, but that's due to a lot of "life" getting in the way. I think I'll try and start covering soon, hopefully for the spring flying season. As far as weight....I had to hollow the nose block out and add 8ozs of lead to make it ballance, still it's under the specified weight of 40 ozs total. Maybe that's because I built it with the narrowed fuselage mod.
Attached Thumbnails Click image for larger version

Name:	Bz77059.jpg
Views:	78
Size:	299.8 KB
ID:	1579565   Click image for larger version

Name:	Dy78360.jpg
Views:	92
Size:	280.2 KB
ID:	1579566  
Old 03-16-2011, 08:08 AM
  #9  
Member
Thread Starter
 
Join Date: Jul 2004
Location: Suffern, NY
Posts: 89
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Bird of time

planebuilder is the bot that inspires all to build a bird of time
Old 03-16-2011, 08:37 AM
  #10  
My Feedback: (8)
 
planebuilder66's Avatar
 
Join Date: Nov 2003
Location: Middletown, CT
Posts: 2,786
Likes: 0
Received 1 Like on 1 Post
Default RE: Bird of time

I hope you ment the BOT is what inspires people to build the sailplane, not me.. I don't think I'm that great at building. Here is the wing mod I also did to make the wing bolt on with just 2 rear nylon bolts. The front tounge of the root ribs fit into a slot in the bulkhead, it took a little time to make the slot for the two ribs, but it fits super snug and there is 0% wing rock or play to the fuselage.
Attached Thumbnails Click image for larger version

Name:	Ge94940.jpg
Views:	107
Size:	72.1 KB
ID:	1579597   Click image for larger version

Name:	Cz80006.jpg
Views:	93
Size:	60.5 KB
ID:	1579598  
Old 03-16-2011, 01:35 PM
  #11  
 
KiwiKid's Avatar
 
Join Date: Feb 2005
Location: Hamilton, NEW ZEALAND
Posts: 181
Likes: 0
Received 1 Like on 1 Post
Default RE: Bird of time


ORIGINAL: AmishWarlord

Yeah that extra weight looks like it helps out a lot with landings.
Indeed and one of the biggest benefits I find having the motor installed is that it markedly increases the flight envelope and accordingly gives you a bigger bang for your buck. I have had alot of fun ridge soaring my BoT and can fly it in winds that I would otherwise consider either too light or too strong o/a of the back up motor power - also gives you "go around" capacity if you make a mess of the landing approach. Here's a short vid from last Sunday.

[link]http://vimeo.com/21112617[/link]
Old 03-16-2011, 03:38 PM
  #12  
Senior Member
 
Join Date: Feb 2011
Location: , NV
Posts: 140
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Bird of time


ORIGINAL: KiwiKid


ORIGINAL: AmishWarlord

Yeah that extra weight looks like it helps out a lot with landings.
Indeed and one of the biggest benefits I find having the motor installed is that it markedly increases the flight envelope and accordingly gives you a bigger bang for your buck. I have had alot of fun ridge soaring my BoT and can fly it in winds that I would otherwise consider either too light or too strong o/a of the back up motor power - also gives you "go around" capacity if you make a mess of the landing approach. Here's a short vid from last Sunday.

[link]http://vimeo.com/21112617[/link]


Great video!Ibookmarked it cause Iliked it so much, thanks for posting it up.

Old 05-30-2011, 11:29 AM
  #13  
 
Tango Juliet's Avatar
 
Join Date: Mar 2007
Location: Mobile, AL
Posts: 947
Likes: 0
Received 1 Like on 1 Post
Default RE: Bird of time

Hey Planebuilder - I just ordered and recieved a Skybench Big Bird (basicly a BOT clone with some upgraded building techniques and longer wing). Do you have any more photos of your build? In particular I'd like to see the receiving former for the rib tongues and your spoiler install.
Old 05-31-2011, 12:39 PM
  #14  
My Feedback: (5)
 
AmishWarlord's Avatar
 
Join Date: Oct 2002
Location: Indian Trail, NC
Posts: 2,939
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Bird of time

Hey Tango you going with sky blue on your's?
Attached Thumbnails Click image for larger version

Name:	Jg14403.jpg
Views:	88
Size:	54.6 KB
ID:	1617462  
Old 05-31-2011, 02:07 PM
  #15  
 
Tango Juliet's Avatar
 
Join Date: Mar 2007
Location: Mobile, AL
Posts: 947
Likes: 0
Received 1 Like on 1 Post
Default RE: Bird of time

You know, I wrote Big Bird, but I've actually got the Sky Bird with a Wing Span of 132". My Oly II is done in Jet White with a Transparent Green band around the right wing in the area of the Polyhedral break, but I want to do something different with this one. That Sky Blue looks good, but I'd be worried it'd disappear at altitiude against a blue sky.
Old 05-31-2011, 11:34 PM
  #16  
My Feedback: (5)
 
AmishWarlord's Avatar
 
Join Date: Oct 2002
Location: Indian Trail, NC
Posts: 2,939
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Bird of time

Oh no need to worry, that thing IS going to cloak and disappear at altitude. Did the same thing my self on a Mid-Star 40. Most of the time I was just flying two white bars in the sky.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On


Thread Tools
Search this Thread

Contact Us - Manage Preferences Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.