Another Jack Stovall Stunt Ship

I made another purchase today from Jack Stovall's brother in law. He, the brother in law, isin the middle of radiation treatments, and doesn't feel like talking. So, I still don't know anything about Jack escept that he built really good stunters.

This ship is a profile and comes in at 40 oz. The other two I posted earlier came in at 46 oz. I don't recognize any of the designs. I guessing their age to be between 20 and 25 years, maybe 30. Note the inverted engine placement and the completely through the fuselage tank placement. He was ahead of his time in that respect.

Can't anyone even offer a guess, or are these planes all original?

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Looks a bit like a modified Banshee.

Don't know what it is, but very clever tank integration.

LAST EDITED ON Jun-12-02 AT 07:57 AM (CST)

>Looks a bit like a modified
>Banshee.

... Except for the C-Tube wing.

No, I think it might be something else - perhaps influenced by the Banshee, but definitely something else. Notice the leading edge sweep. It also appears to have one of Al Rabe's wiggle rudders.

Elwyn - look at the interesting motor crutch he made for this ship. No blocks above or below the motor mounts aft of the backplate and what appears to be a firewall. I have to wonder how well the OS Max-S 35 worked with the setup.

LAST EDITED ON Jun-12-02 AT 09:30 AM (CST)

This is a much larger ship. Also, the wing has a thick airfoil with the high point forward.

Bill Francis

See my following posting. After measuring, the high point was not as far forward as it first appeared.

>This is a much larger ship.
> Also, the wing has
>a thick airfoil with the
>high point forward.
>
>Bill Francis

Bill;

Why not post the dimensions?

LAST EDITED ON Jun-12-02 AT 08:45 AM (CST)

That is a good looking plane, looks very well made.
Is that tank home-made ? If so it is a lot better than my efforts, ( I am an electronics tech, do a lot of soldering.....not to that standard, though...SIGH )
Also the soldering on the under-carriage legs looks good...
I'd also be interested to hear the "numbers" of this plane.
Kind of like a thicker-wing Nobler, Maybe ?
Also interesting to see the aerodynamic balance tabs on the elevators, often thought about doing this, is it worth trying ?
Less need to worry about the elevator push rod bending on inside manouevres ?

Dave Moffitt

This is the editted bit......just noticed there is no support for the elevator push-rod, not needed with those elevators ?
Interesting plane, how does it fly ?

Looks like a plan - spirit of saginaw, from flying models. modified front though

LAST EDITED ON Jun-12-02 AT 01:38 PM (CST)

LAST EDITED ON Jun-12-02 AT 09:17 AM (CST)

53" Span, 41" length, 570 sq. inches, 40 oz,

Airfoil is 2-3/16 thick at appx. 33%

Bill Francis

I had to correct the wing area. I forgot to include the flaps

David,

The tank appears to be "store bought". I say this because of the reinforching ribs. But, it is definately modified. Do you have an idea of how I can check to if it is uniflow?

I only got it yesterday, so I haven't flown it yet. I have three new toys to play with, and I have just started to play fith the first ship in my previous posting. I had thought I had cleaned out the tank, but I could only get a couple of laps before the engine quit. When I drained the tank the fuel was dark gray. So, I have more work to do.

I will say this, that #1 ship lands beautifully. And this from a flyer who can't land without a bounce to save my life.

As for the unsupported elevator pushrod, I will go through the ship completely before I attempt a flight. That may be a mod I make.

Bill Francis

A note to Bob Kruger.

The rudder is not a Rabe rudder. Just an overdone ground adjustable.

Also, take a look at the landing gear. No holes through the fuselage. This gear can easily be removed and replaced.

Why can't you give the man credit for an original design? There are similarities in most planes.

ADS

>Why can't you give the man
>credit for an original design?
>There are similarities in most
>planes.
>
>ADS

True, there are similarities in most planes, but I also think it's a published design, "The Spirit of Saginaw", that has been modified according to Al Rabes and Ted Fanchers concepts regarding how the engine is mounted. It looks very well executed.

Not to take anything away from the builder, I have too aften seen builders claim a new design when the changes were not much more than simple cosmetics. It doesn't do justice to the original designer to not, at least, acknowlege the source.

Since, aparently, the builder of this fine model, is not available to let us know if in fact it's an original, or heavily influenced design, it might be best to comment on the quality of the build, mention possible design influences, and leave it at that.

Looking at the pictures, It's my opinion that this should be a very decent flying ship. It has that "right" look to it. The moments look to be adequate and correct for a stunter built in it's time frame. Enjoy it, I think it will be a nice flier.

Bill,
to check if it is uniflow, take the tank apart..........
OK, you don't want to do that, nor would I.....
What I do when I build a tank ( I only build uniflow, muffler pressure tanks. )...I make the usual feed to venturi and a feed from the muffler which goes into the tank close to the fuel feed, in your case, if it is uniflow there will be such a tube facing into the airflow.
I also make 2 filler tubes into the tank and connect them together to seal them for flying ( I note your other planes have this arrangement, so I SUSPECT this plane is plumbed similarly )
I note it has a sealable ( is there such a word ? )tube inboard, facing down.
Good luck, looks like a good plane, as said above, it looks right so it should fly right.
As a personal opinion, I would fly it, without trying anything heroic, before modifying the pushrod, just my ( NON-EXPERT..) opinion.

Dave,

Thanks for the advice on the tank. I think I'll just clean it up, support the pushrod and fly it.