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Old Aug 10, 2013, 11:33 PM
Aircraft Designer Guy
AJWoods's Avatar
Melrose, MA
Joined Jul 2005
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Cartoon Skeleton SR-71

Probably my last indoor build before NEAT, an SR-71 to go along with my F-35 (http://www.rcgroups.com/forums/showthread.php?t=1768778) . Same wing area, but the airframe is a bit draggier so I needed to go to 7mm motors on TTF props. I think you could get away with a hotter 6mm wind, but I didn't have any on hand.

Set up on a DT rx with twin steer mix on. I have elevons, but the plane could be easily flown as just elevator/diff thrust. Very smooth flyer, a bit less nimble than the F-35, but more forgiving all around (maybe a bit slower too). I designed the fuse profile so that when on the ground the plane makes contact on 3 points with the nose high. This makes for awesome ground handling with no wheels, and allows for ROG takeoffs and touch and go's

I'll try to get plan up before my next trip.

Adam

Micro SR-71 (1 min 23 sec)
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Old Aug 11, 2013, 02:56 AM
in persuit of low wing loading
Gordon Johnson's Avatar
Boston, Mass
Joined May 2001
6,450 Posts
Adam,
It flew great the other night. It will be a hit at NEAT. I think it s even more cartoonish than your F-35. I like it.

Gordon
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Old Aug 11, 2013, 03:36 AM
TheyreComingToTakeMeAway!
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USA, ID, Coeur D'Alene
Joined Dec 2003
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this is nearly an ironic model, the fastest jet becomes a slow indoor model thats great!
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Old Aug 11, 2013, 08:30 AM
Registered User
Centreville,VA,USA
Joined Apr 2001
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Very nice...

Pete
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Old Aug 11, 2013, 08:15 PM
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West of California Speedway, East of LaLa, North of Disneyland
Joined May 2001
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I love it!!!

(Perhaps this forum is coming back...........................................??? )
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Old Aug 12, 2013, 04:03 PM
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Carbondale PA
Joined Aug 2005
570 Posts
Adam,

Love the cartoon SR-71! Looks really beautiful. I can't wait to see it fly at NEAT.

Joe.
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Old Aug 12, 2013, 06:13 PM
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West of California Speedway, East of LaLa, North of Disneyland
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MIT KID,

You've very carefully hidden details about the gear you used, except for a DT Rx with twin steer. Care to divulge? Motors used, props, batt capacity, component locations, AUW and CoG. The usual builder-beggars favorites!!
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Old Aug 12, 2013, 08:26 PM
Aircraft Designer Guy
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Melrose, MA
Joined Jul 2005
1,482 Posts
Quote:
Originally Posted by 356Jim View Post
MIT KID,

You've very carefully hidden details about the gear you used, except for a DT Rx with twin steer. Care to divulge? Motors used, props, batt capacity, component locations, AUW and CoG. The usual builder-beggars favorites!!
I used the 1.7Ohm 7mm motors from plantraco on tri-turbofan props. The battery is a TP160mAh cell, and the CG is right at the tip of the intake cones. As for component locations, I'll include them on the drawings once I get around to posting them. AUW is right around 20g.

If I build another I'd use the 6mm motor and prop from the NanoQx quad, and use a single servo for elevator, instead of elevons.

-Adam
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Old Aug 15, 2013, 10:17 AM
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Oxford, Michigan, United States
Joined Aug 1999
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Cute Adam!
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Old Sep 18, 2013, 08:14 AM
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Long Island, NY
Joined Jun 2007
479 Posts
Adam, would it really be too heavy to fly if they weren't skeletons?
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Old Sep 18, 2013, 08:31 AM
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Oxford, Michigan, United States
Joined Aug 1999
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Having seen it fly, I'm sure it would fly faster but OK with solid depron. Might be too fast for a single gym IMHO.
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Old Sep 18, 2013, 10:09 AM
Aircraft Designer Guy
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Melrose, MA
Joined Jul 2005
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I think it would be OK solid. I ended up using two 7mm motors, before I found out how good the 6mms from the nqx were. With those motors I think you could do solid and come out at a similar weight.

A
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Old Sep 18, 2013, 05:49 PM
Gary
gklein's Avatar
USA, CT, Sandy Hook
Joined Dec 2009
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Quote:
Originally Posted by AJWoods View Post
I think it would be OK solid. I ended up using two 7mm motors, before I found out how good the 6mms from the nqx were. With those motors I think you could do solid and come out at a similar weight.

A
Adam,

What is the weight of the 6mm? And is this what you used on the flying wing racer at NEAT?
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Old Sep 18, 2013, 07:00 PM
Aircraft Designer Guy
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Melrose, MA
Joined Jul 2005
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Quote:
Originally Posted by gklein View Post
Adam,

What is the weight of the 6mm? And is this what you used on the flying wing racer at NEAT?
Yes it was. I'll weigh one tonight.

A
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Old Sep 19, 2013, 11:00 AM
Gary
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USA, CT, Sandy Hook
Joined Dec 2009
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Also I assume that the counter clockwise is the motor that I would order? For a standard prop.
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