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JTechLaser Quick Build SR-71 with simple thrust vectoring

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JTechLaser Quick Build SR-71 with simple thrust vectoring

Old 02-17-2010, 01:52 AM
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j4ck4
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Default JTechLaser Quick Build SR-71 with simple thrust vectoring

Thought I would start a thread over here dedicated to the SR 71 as designed and built by the moderator of the pusher jet forums here on WattFlyer. crxmanpat started the thread by the same name over on Rcgroups, I built one of these over the weekend have 2 flights so far in pretty strong and gusty winds here in Tulsa and I love it so much I asked if it would be alright to start this thread.
I got the okay from both Jim "Eliworm" and Pat "crxmanpat" so here goes. I didn't actually take a series of build photos this time, but will soon begin cutting foam for the next instance of this plane I intend to put in the air.
For now I will post some pics of my build, link to the thread on Rcgroups, and post a video shot of my second flight.

http://www.youtube.com/watch?v=YWDMmSkHHBc
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Old 02-17-2010, 01:55 AM
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Here is the lnk to Pat's thread on RcGroups.
http://www.rcgroups.com/forums/showthread.php?t=1176148
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Old 02-17-2010, 02:09 AM
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Very cool. I've always liked the SR-71.
It looks like you are having the same problem I had with the timestamp flashing in the video. I hit the reset button on the camera and the flashing stopped.
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Old 02-17-2010, 02:36 AM
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Originally Posted by aero_k View Post
Very cool. I've always liked the SR-71.
It looks like you are having the same problem I had with the timestamp flashing in the video. I hit the reset button on the camera and the flashing stopped.
I have the gumpack camera and have losded the changed time stamp file it just resets to 2008 and flashes everytime you shut it off, so now I just leave it.
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Old 02-17-2010, 02:44 AM
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Here are the initial specs from Pats build thread,
Wingspan - 23"
Length - 40"
Motor - 2212-6 2200kv
ESC - 30A
Prop - APC 6X4E
Servos - 2x 9g micro servos
Battery - 1350mAh 3S

AUW - 14.5oz

CG - 3"-4" rearward from the tips of the engine inlet cones.
And Plans:
Attached Files
File Type: pdf
JTechLaser SR-71 Decals.pdf (93.5 KB, 178 views)
File Type: pdf
SR-71 Tiled Letter.pdf (154.3 KB, 163 views)
File Type: pdf
SR-71[1].pdf (148.3 KB, 158 views)
File Type: pdf
SR-71 Tiled A4.pdf (156.5 KB, 146 views)

Last edited by j4ck4; 02-18-2010 at 05:47 AM.
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Old 02-17-2010, 07:55 PM
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Very nice Jack! Yes yes, a very nice flying bird indeed. I moved my CG back and flew it a few times last Friday, and it seems to be better now. I also added a CF stick on the bottom to help with the nose flexing.

Here's some pics from Friday.
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Old 02-18-2010, 03:26 AM
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Its weird I know Pat, but when I try to visit Nico Hobbies I get a 404 error, you don't have permission to access this server.
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Old 02-18-2010, 05:10 AM
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That's because the Nico site is shut down at the moment. Should be up and tunning again next week.
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Old 02-18-2010, 05:45 AM
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Ah, makes sense. Didn't know if you were having problems with web hosting or just site troubles. I've done some web design myself so understand. Let me know when you get it back up I would love to check it out.
Also, I am ready to start cutting foam on my second build, gave the first one to one of my FB's I've been supposed to build him another F22, he destroyed the yard bird I assembled for him. He saw the Sr and fell in love with it.
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Old 02-18-2010, 06:58 AM
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My site will mainly be for mini profile parkjets in the 18" wingspan range. I already have an F-22, F-15, F-18 and Eurofighter, with plans to add many more this year.

Made from a combo of 3mm and 6mm depron, and light gear. AUW is anywhere from 5 to 7oz. Great for indoor flying, and outdoors in light winds.
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Old 02-18-2010, 02:47 PM
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That sounds awesome Pat, built a dollar store foam 18" F22 a while back powered it with a park 250 and had a blast with it during its life span. Can hardly wait for you to get the site going, maybe I'll be able to order some lightweight gear from you this summer.
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Old 04-17-2010, 06:41 PM
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Just to let you guys at Wattflyer know we are selling these at BmkDesigns.

http://www.bmkdesigns.net/sr-71-blackbird.html

I am a friend of both Jim and Pat if anyone here wants to know the connection like they did at RCGroups.

Mike
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