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Big Otto

Stuka Stunt Main Forum · 7 of 7 known posts recovered

godzilla · Jun 21, 2001 10:03 AM

#0 source
There has been a lot of discussion on the board about ½-A models. This got me to thinking of my youth.

½-A flying afforded my friends and myself a convenient way to go flying without the need for parents. I used to grab one of my friends, a bottle full of fuel and a battery, one of my planes and walk across the street to the church baseball field and fly until the fuel bottle was empty. That was a good 2-3 hours!

I only had 1-2 designs that I thought were FUN to fly, as compared to a .35 size plane. I mean that would do anything you wanted to do, in any conditions. One was the Little Satan; it was all right, and would do pretty good figures with a Black Widow .049.

My favorite was the Big Otto. Man, I loved that design. I did, however, modify the nose from the plans and had the firewall against the leading edge of the wing, therein shortening the nose about 2”. Perfect for a Black Widow.

The thing about the Big Otto was that the wing was HUGE. It was really more in the range of a .15 size wing. Very thin airfoil, no taper to the wing. Covered with Silray and two coats of dope, was also virtually indestructible over grass. Monokote would be even better. A very good stunt trainer.

Most (if not all) of the common ½ A designs miss the boat because the wing is too small, and will stall too easily to do any real maneuvers. The Big Otto would FLY!

I will make a commitment to start a Big Otto 2001 project this year for one of the new ½-A engine designs. Anyone got one of those old kits that I could get a look at? I do not think the plans were full size.

TigreST · Jun 21, 2001 10:45 AM

#1 source
Green Monster,
I built one of those "Big Otto's" also during my first years in C/L. Thought that it was the coolest thing goin' in the C/L neighborhood. That was until I actually went to fly it, ...major bummer. With all the looks of the killer combat/stunt plane it was a real dog when it came to the first flight. Mind you, I did not have a Black Widow on the front of it, and I had not changed the nose as you did with the shorter front end. That may have been the key to getting the thing to turn, ..shorter nose. It was all I could do to get it out of level flight. Rock solid in the straight and level. Funny, in that it was one of my best builds to date. Think I crashed it just so I would not have to fly it again (did not go to the trim/mod place back then). After that it was back to Baby Ringmaster's for 1/2A fun. I remember how hot the Baby R was after flying the plank winged Baby Ringmaster Beginner's. Logical next step of course was the Fox-15/Ringmaster Jr., ..great fun.
On the other end of the spectrum for lack of stability was a Fox-19 powered Riley Wooten Voodoo,...what a handful, ...major CG problem that never got fixed before impact with the ground.
Tony

Crapshoot · Jun 21, 2001 03:35 PM

#2 source
I've got a Big Otto wing mounted to a short profile fuselage. Turns good with the engine mounted just slightly ahead of the leading edge. I've got the original instruction sheet around here somewhere but of course it doesn't have the full size plans. If it would be of any help I can get some measurements of the wing. Not 100% sure it has the original wingtips on it.

Big Country Joe · Jun 22, 2001 09:28 AM

#3 source
In the early 70's myself and several other modelers got hooked on the Big Otto. We built the front end removable and held in place with rubber bands, so less that perfect landings were not much of a problem. We then discovered in the instruction sheet a listing from Sterling for spare parts and sent for a whole bunch of them, thus allowing the making af a whole bunch of them!
I just loved that plane. I still have one in the box that is still covered with the original wrapping.

currell · Jun 22, 2001 10:11 AM

#4 source
We then discovered in the instruction
>sheet a listing from Sterling
>for spare parts and sent
>for a whole bunch of
>them, thus allowing the making
>af a whole bunch of
>them!

Big Country: I believe Big Otto was a Scientific kit.

But could be wrong. Currell

The Kiwi · Jun 22, 2001 11:44 AM

RE: Big Otto from Scientific#5 source
>
>I believe Big Otto was a Scientific kit.
>
Yes, it was.


Kiwi

.

Big Country Joe · Jun 25, 2001 10:40 AM

RE: Big Otto from Scientific#6 source
OOPS! You guys are right! ANOTHER SENIOR MOMENT!