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Aug 10, 2013, 10:33 PM
Aircraft Designer Guy
AJWoods's Avatar
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Discussion

Cartoon Skeleton SR-71


Probably my last indoor build before NEAT, an SR-71 to go along with my F-35 (https://www.rcgroups.com/forums/show....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)
Latest blog entry: Star Wars A-Wing Submarine
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Aug 11, 2013, 01:56 AM
in pursuit of low wing loading
Gordon Johnson's Avatar
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
Aug 11, 2013, 02:36 AM
TheyreComingToTakeMeAway!
derk's Avatar
this is nearly an ironic model, the fastest jet becomes a slow indoor model thats great!
Aug 11, 2013, 07:30 AM
Registered User
Very nice...

Pete
Aug 11, 2013, 07:15 PM
Registered User
I love it!!!

(Perhaps this forum is coming back...........................................??? )
Aug 12, 2013, 03:03 PM
Registered User
Adam,

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

Joe.
Aug 12, 2013, 05:13 PM
Registered User
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!!
Aug 12, 2013, 07:26 PM
Aircraft Designer Guy
AJWoods's Avatar
Thread OP
Quote:
Originally Posted by 356Jim
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
Latest blog entry: Star Wars A-Wing Submarine
Aug 15, 2013, 09:17 AM
Registered User
Petefoss's Avatar
Cute Adam!
Sep 18, 2013, 07:14 AM
Fellow Enthusiast
billbo1970's Avatar
Adam, would it really be too heavy to fly if they weren't skeletons?
Sep 18, 2013, 07:31 AM
Registered User
Petefoss's Avatar
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.
Sep 18, 2013, 09:09 AM
Aircraft Designer Guy
AJWoods's Avatar
Thread OP
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
Latest blog entry: Star Wars A-Wing Submarine
Sep 18, 2013, 04:49 PM
Gary
gklein's Avatar
Quote:
Originally Posted by AJWoods
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?
Sep 18, 2013, 06:00 PM
Aircraft Designer Guy
AJWoods's Avatar
Thread OP
Quote:
Originally Posted by gklein
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
Latest blog entry: Star Wars A-Wing Submarine
Sep 19, 2013, 10:00 AM
Gary
gklein's Avatar
Also I assume that the counter clockwise is the motor that I would order? For a standard prop.


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