XF 85 Goblin Crash

[John Boren]

If you have a high speed internet connection to download a 10 meg file, check out the crash of my Goblin hitting the ground three times in one flight.


http://www.aerocompositedesign.com/Personal_Toys/personal_toys.html

John Boren

[robert harik]

If there ever was an airplane that should hit the ground ...

[Hank Scorpio]

That has to be THE toughest model I've ever seen and from judging by the length of the take off roll, it must be made of cast iron! Man, I've seen a loaded 747 get off in less runway than that thing!

[Muxje]

If there ever was an airplane that should hit the ground ...

Aww no, it's cute... But what is it?

[Andy W]

Those takeoffs remind me of people who run to launch a model.. they think the further they run, the faster they're going.. that model was probably going as fast as it was going to get after about 150'..
..a

[Hogster]

WHAT ON EARTH is that thing made from?!!!!!!! :eek: Rubber?!

Hilarious video and I think I have to agree with robert harik .... :rolleyes: ;)

[John Boren]

The body of my Goblin is made out of 2" thick blue foam you buy at your home improvement center. I then covered it in 4-ounce cloth and epoxy resin. Yes the take off run was very very long. After a while I turned on the high rate for the elevator and it then popped off the dolly. The entire flight had full up elevator and then full trim and I still had NO pitch control. I have since figured out what happened and that same plane will one day fly again. Well part of that same plane will fly again. I had to build another set of wings and the fuselage from the vertical fin forward but the tail section and canopy survived. It's pretty much back together but it has been sitting in my basement for a couple years just waiting.

John Boren

[John Boren]

By the way if you click on the picture next to the video link you will see more pictures of the model and a little detail about how it is built.

John Boren

[GaryMC]

For those who wondered what that Goblin was, it was a 'parasite fighter.'

Inteneded to be carried along with large bombers of the time (late 40's and early 50's, so think Prop) it would unhook, protect the bombers, and then reattach to the bomber to wait for the next attack, or the return home.

This link (http://home.att.net/~jbaugher1/p85.html) will give you more of the story of the XP/XF-85 Goblin.

Gary

[robert harik]

John ,I was not cutting down your goblin, just the original.
Hideous thing that it was.

[ChrisP]

WHAT ON EARTH is that thing made from?!!!!!!! Rubber?!

Hilarious video..........
It reminded me of a Tom & Jerry cartoon where Tom is run over by bulldozers, falls from giant skyscrapers etc and is still able to get up and walk away. Unbelievable !

[gunf1ght]

For those who wondered what that Goblin was, it was a 'parasite fighter.'

Inteneded to be carried along with large bombers of the time (late 40's and early 50's, so think Prop) it would unhook, protect the bombers, and then reattach to the bomber to wait for the next attack, or the return home.

This link (http://home.att.net/~jbaugher1/p85.html) will give you more of the story of the XP/XF-85 Goblin.

Gary

nicknamed the "wobblin gobblin" the models flight characteristics seemed to match everything that I read about the full scale aircraft.. Beautiful Job on the work....Now need a B36 or B52 of the same scale to launch it from....

[helderluiss]

Hello,

I think the goblin was a fantastic airplane, and for that reason I want one. Can you tell if you seel it or were can I find the plans to build it

Thanks,

My email : Helder-luiss@iol.pt

[John Boren]

Sorry, but NO plans exist of this plane. The body was sculpted from 20 ringed pieces of foam, glued together then sanded to shape. The wing and tail sections were hot-wired cut the old fashion way. As for selling the rebuilt one, sorry the Goblin has at least one more crash or maybe even a flight to perform in the future

John Boren

[Usta Bee]

I have since figured out what happened and that same plane will one day fly again.

Well, what happened ?. :confused:

I thought it was made of rubber Superball material !. :D

[eBird]

LOL, I haven't laughed out loud like that in a long time...

That second launch with it bouncing off the ground TWICE was utterly priceless.

Thanks for the laugh!!

[OzDragonFlyer]

my mom told me never to point & laugh at ugly things.. but this has to be an exception..

Classic!

[schneller]

Man, I'm still laughing. That's the best RC video I've ever seen. Thanks for sharing it!

[tran1172]

I saw a story about this plane on Discovery Wings. They were supposed to be carried inside a bomber which acted like a flying aircraft carrier. Launching was ok but recovery (airborne reattachment to the bomber) was very sketchy and ultimately proved unsafe. Really interesting concept even though it was a failure.

[rchawks]

I got to see this aircraft up close at the air and space museum in Nebraska 2 months ago. It really is quite beautiful and would take alot of guts to fly something this size.
What a Goblin.

[Cerulean Ghost]

Haha! That is one CLASSIC video.
Well done.

[Demon-Leather]

Someone over on page one wanted some plans for the Goblin. Kenny was building one around the beginning of '03 but I guess he stopped :( He did however, leave a nice beginning of a plan to get you "started". I'll get back on the Gobby again, and probably use Kenny's start on it to save me a LOT of work. I've just go too many going now, including a build-thread on a PA-25 Pawnee in Parkflers that's about 65% done (that I need to be doing besides writing this :rolleyes: ) I sure hope My PA-26 doesn't end-up in THIS forum!... :p :D But, take a look,.. if nothing else, there's some Kooool pics, and some more info on the Gobby there! :D
Bob
http://www.rcgroups.com/forums/showthread.php?t=81369

[Joe Ford]

John...great video...where do you fly out of??? I fly at Shoe Factory Road...Tri-Village R/C'ers. Maybe we could meet up sometime.

[stroland]

too bad looked good too diferent to I like that!

[lttakas]

ahahahahahaha man that plane is strong

[John Boren]

One day I will find some photos of it's construction and post them here. Hopefullly something soon will inspire me to finish the rebuilding of it and get it back in the air.

John Boren

[lttakas]

but realy what was that plane made out of???

[John Boren]

I dug up some old photos I took during the building process. Their quality is on the dark side but you should be able to see how the Goblin in the video was constructed as well as it's yet unfinished replacement.

The foam used is your typical 2 inch thick extruded construction foam found at your local Home Center. I used thin poster board for the templates and hot wired the sections to shape. 3M 77 spray was used to hold the 22 sections together while two layers of 2 to 4 ounce cloth and epoxy finishing resin was applied over the hole thing after the wing and tail surfaces were installed. Lots of sanding and filler later and you have an airplane.

John Boren

[lttakas]

nice job on the foam cuting

[Tail Spin1]

I looked for a kit of that airplane a while back, all I could find was a plastic model. I thought about scratch building one but never got around to it. Sure looks good though, and the full size version has a history all its own.

The real thing was made to fit under the belly of a B-36 Peacemaker. It would hang on for the ride and detach if the “mother ship” came under attack. After eliminating the threat it would reattach it’s self to the B-36. (Like the old movies of biplanes being suspended under airships, probably the inspiration.) The aircraft was never intended to touch the ground as a result the design eliminated landing gear and just added a skid for emergency landings.

Now all you need is a giant B-36 to fly it from. I’d say about a 40 ft. wingspan should do it. Hay, not my fault you made the Goblin so big.

Have fun!
Zach

[Vince inTX.]

The biplanes launching from derrigibles was not a fabrication of hollywood. It was actually done by the U.S. Navy. IIRC the ACRON and the SHANNENDOA. were both capable of launch and recovery of aircraft fitted for that duty. The setup was used for sub hunting. The blimb would locate and "interrogate" the target. If determined to be hostile the planes would then be launched to attack.

Vince

[Tail Spin1]

I guess I should have said “old footage” instead of “old movies”. I remember seeing it on some documentary, (probably on the History Channel).

Here’s a picture of how it worked. The aircraft would be hoisted through the “hangar doors” in the bottom of the airship. The Macon and the Akron could carry up to 5planes each, pretty cool!

Zach

[JWarren]

John!

Thanks for sharing! I must say, the video you posted has truly lightend my day! Really enjoyed seeing the photos of your build technique as well! Very nice!

John

[WaterDog]

Can't stop laughing! Still have tears in my eyes while writing this... :D :D
Thanks, that was hilarious!

[glydr]

WOW - Dial in some expo on that elevator!

[John Boren]

The problem was not with over controlling the plane. From the moment of takeoff to the end of the flight I had full up elevator and full up trim. The V-Tail Elevator set up simply did not have enough pitch control since the angle between the two surfaces was much less then the 100 degrees needed for the elevator to be affective. Now that I know this small detail the rebuilt Goblin will fly with the bottom two elevators coupled to the upper V-Tail for pitch control.


John Boren