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Old Feb 18, 2015, 09:11 PM
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Joined Nov 2014
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Lifting body edf?

One thing i've been experimenting with lately are lifting body aircraft, it seems to be rather taboo in itself, however I do know a large amount of modern aircraft use some form of this principle, what are your thoughts? How come no body has looked further into edf lifting bodies? lifting body:
lifting body (0 min 55 sec)
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Old Feb 18, 2015, 11:10 PM
Do it Right, the first time!
CoolerByTheLake's Avatar
United States, MN, Hermantown
Joined Dec 2008
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Well, I can't comment on the lifting body -- but I can on your video!..

Vertical Video Syndrome - A PSA (2 min 59 sec)
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Old Feb 19, 2015, 05:05 AM
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hahaha duely noted
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Old Feb 19, 2015, 05:43 AM
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just build mount EDF on top & fly
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Old Feb 19, 2015, 05:59 AM
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but couldnt that mess with the flight characteristics?
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Old Feb 21, 2015, 05:23 AM
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I don't know I just fly to have fun
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Old Feb 21, 2015, 06:07 PM
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John Boren's Avatar
Colorado
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I'm a big fan of lifting bodies and have collected quite a bit of stuff on them. Just in case you already don't have them, here are some X24 A&B drawings. also included one of the HL-10

John Boren
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Old Feb 21, 2015, 07:05 PM
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Skunkwork's Avatar
Norway, Oppland, Vestre Toten
Joined Feb 2014
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The X24B would be cool as an edf, but i think you would have a hard time controlling these wobbling crafts..
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Old Feb 24, 2015, 04:31 PM
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KiwiKid's Avatar
Hamilton, New Zealand
Joined Jun 2005
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Maybe a model with some stubby wings as well might be the ticket.

I have always like the look of the Bat-Ray. You could tack an EDF in a pod on the tail area and let her rip

http://www.air-c-race.de/index.php/p...em/107-bat-ray
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Old Feb 24, 2015, 05:39 PM
deltas are cool
AIR SALLY's Avatar
Tehachapi ,CA.
Joined Apr 2006
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X24B and the HL10 with the center vert were the best flying of the bunch ....always wanted to try the HL-10 maybe just drop launch it for a glide to landing . I used to work with Bruce Peterson he had some crazy stories of flying those things. sadly he passed away a few years ago. some of the vid out there of these flights are scary looks like they are going straight down .
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Old Feb 24, 2015, 06:10 PM
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Daren's Avatar
Los Alamos, NM, USofA
Joined Nov 2000
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Many of the modern fighter jets do incorporate lifting body technology into their designs. That's why the F-15 and more recently the F-16 were able to make it home with part or most of one of their wings missing; the fuselage produces most of the lift.

Lifting bodies are not limited to experimental NASA aircraft or fighter jets, however. The Guppys (Pregnant, Super, and Beluga) all have lifting bodies. The lift from the fuselage must be taken into account, or the airplane will be tail heavy (massively!).

We crashed our original Super Guppy model on the test flight because we didn't take the fuse's lift into account. All subsequent models' CofG did account for the "lifting body" and flew perfectly.

Daren

p.s. It's too bad we missed your test flight due to your VVS.
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Old Feb 24, 2015, 09:21 PM
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dutch roll on the m2f3 from what i had seen was rather bad, could ventral strakes suffice in eliminating that?
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Old Feb 26, 2015, 12:05 AM
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Go for it man, if it works full scals it's possible for a model. My advice would be to make the plane quite a bit larger than a normal plane with the same powerplant. The less wing/body loading will make it slower but much better to fly.

You are probably going to have some Dutch roll no matter what you do so some stabilization will probably make your stick time a little easier.
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Old Feb 26, 2015, 10:00 PM
deltas are cool
AIR SALLY's Avatar
Tehachapi ,CA.
Joined Apr 2006
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Quote:
Originally Posted by Duff493Navy View Post
dutch roll on the m2f3 from what i had seen was rather bad, could ventral strakes suffice in eliminating that?
when the M2 F2 crashed they rebuilt it with a vert tail in the center ...it flew better after that . some of the rolling was caused by the old flight control computers...they would over load and needed to be reset so the pilots had there hands full . plus Bruce told me they came off the mother ship almost in a stall
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Old Mar 02, 2015, 01:08 AM
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deleted..
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