F-19 concept (the old pear-shaped one)
 

Wondering if anyone's seen or heard about a jet version of the original F-19 concept aircraft (see pic) - guessing it would have to be scratch built...

With the negative dihedral, would that make flying difficult i.e. would the plane try to flip itself?

F-19
 

Now thats a cool looking plane :cool:

Dave R

F-19 concept (the old pear-shaped one)
 

yah I know... been thinking about this one for a few years now... even went to kinko and had the 1:48 model plans blown up to a bigger size - the girl behind the counter chuckled when I said I want them blown up to 36" wide x 6' long...

I was thinking that the inlet vanes would recess into the fuselage at any throttle setting over 15-20% (due to the angle, for max inlet) also using the "vents" on the top as cheater inlets as well.

:P

new pic
 

saw this pic of the model's box.... gives some perspective

F-19
 

Do you think she would be Stable? 12# Turbine?

Dave R

F-19 concept (the old pear-shaped one)
 

No, that's the one BIG thing that concerns me.... now it looks like inverted flight would be real stable

F-19 concept (the old pear-shaped one)
 

I'm no aerodynamics expert (best talk to Bob Parks about this), but it looks to me like it may have some nasty adverse yaw characteristics, but if you put a gyro on the roll axis, I think it would fly half way decently. Build a small one as a chuck glider to get the CG right first.

F-19 concept (the old pear-shaped one)
 

hmmm, good idea about the gyro :-D thx

F-19 concept (the old pear-shaped one)
 

oh, and sorry if I sound dumb, but who is Bob Parks?

F-19 concept (the old pear-shaped one)
 

Bob is the "list mom" on the R/C Jets e-mail list. The last e-mail address that I have for Bob is [email protected] . But it is probably best to simply join the e-mail list and ask there so that everyone will benefit from the info. I am at work right now and do not have the address for the list. Can anyone help?

F-19 concept (the old pear-shaped one)
 

I think 2 of these have been built before. Not sure if they were turbine powered, or DF. I remember a photo of one flying appeared in RCJI about 2-3 years ago. I also remember seeing photos of that Col Art DeVries guy building one, perhaps in Flying Model magazine... Thats all I remember on it - never saw any remarks on how they flew.

RCJI editors email?
 

anyone got a copy of RCJI around for the ED's email address? I cant seem to find the link on traplett.com

F-19 concept (the old pear-shaped one)
 

Ron,
I remember seening the article too and an inflight photo....so it is doable. This was with a DF not a GT

Article Timeline?
 

Any guesses as to when you two saw it?

And just because of the shape, I was thinking DF would be the way to go... more of a "floater" plane than one made for speed

Sure it can fly!
 

BiZZO -

Sure it can fly! If Boeing's/USAF's prototype airplane known as the (Klingon) Bird of Prey can fly, then so to can the Testor's F-19.

I would however cheat just a little on the wings by ten percent (as in making them larger and decreasing the negative dihedral). Gyros for sure on roll and yaw axis. I would "straighten" up the verticle stabs by a few degrees and flatten the conards also. But not so much as to distract from the original model kit's design.

Heck, you could probably to the same thing with the Roswell UFO/lifting body model kit with the required modifications for engine inlet/tail pipe.

RE: F-19 concept (the old pear-shaped one)
 

Look at the plans from jetex.org, they're close as I've found... searched yahoo for F-19 plans.

I'd rather have the Monogram version, if there's anyone knows about any for it.

J.L. Frusha
<[email protected]>

RE: F-19 concept (the old pear-shaped one)
 

I remember when the model first came out from Testors, I was working at a hobby shop and a little later I think they came out with a chuck foamy glider of that model. It was very close, or the same as the testors one and flew quite well. I think that it would fly fine just might want to do a coroplast or balsa foam proof of concept pusher after the chuck glider just in case.

RE: F-19 concept (the old pear-shaped one)
 

F-104's seem to fly quite well with anhedral, no reason this one shouldn't.......

RE: F-19 concept (the old pear-shaped one)
 

hey guys back when jet model magazine first came out there was an article with flight pictures of a guy in the netherlands who scratched one up.i believe it took a bit of experimenting to get it to fly well,but ti did fly.if i find the issue ill let cha know. goggles

RE: F-19 concept (the old pear-shaped one)
 

Hi

I think it was in RCJI in 1998 or 1999. It was a guy in Italy. I remember a picture of him holding it on top of his head. It was DF, not very big in size and it was light grey.

RE: F-19 concept (the old pear-shaped one)
 

The jetex plans are free, balsa, free-flight w/ mini rocket motor...
Something like a 9 1/2" wing-span. Not too many parts, either.
They used a flashlight-bulb, painted, for the 'helmeted' pilot...

Looks like they can be adapted for ducted-fan, with appropriate up-scaling and re-contour of the belly.

I've already down-loaded them. Couple of deformations, from photoing paper originals, but looks sturdy.
I think I can up-size and adapt to the Monogram model, easily enough... Going to adapt with some other R/C
pieces, that I think will make it more realistic. Going for a 1/6 scale mini-fighter w/G.I. Joe-type pilot at the con.
Hope to go ahead and link the controls to the apropriate parts of the anatomy, for more realism...

Going for dual electris D-f's and all sorts of stuff. Gonna be tough, for a buget aerobatic semi-fictional bird...

RE: F-19 concept (the old pear-shaped one)
 

I am sure it would fly, anhedrial is to generate alot of lift under the wings to carry extra heavy loads, if you see giant C-5 Galaxies and An-124 and 225 they all have anhedrial wings and they fly good, i also did an experiment with same type of wing confriguation and my plane flew real good and it was most stable model i ever had!, now being a jet could be somewhat different story but i am sure it will work out. I had to load up fuselage with extra lead weight for it to be heavy enough to be flown stable....this littel plane was my own design and weight was around 8-9lbs....

Sammy