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Old Jan 25, 2014, 07:26 PM
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United States, MD, Elkton
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Not a 'lil' Rascal

"I, Earl McMullen, being of sound mind"- etc. have decided to build a full scale, man carrying Ultralite Aircraft.

I'm 73 years old, and have been around aircraft all my life. I've helped repair full scale planes, and I built a Fisher FP202 kit ultralite in 1986.

I've been a modeler since 1951, and have generally been in giant scale all that time.
I've designed a lot of model aircraft, and converted many engines from yard utility machines.

I have several model builds either completed, or under construction here at RCG,so I'm no stranger to some of you.

This will be a wood aircraft, built with the same procedures we use in building models.

The title may be cryptic, but it just means we're using the basic outline of the Sig Rascal 110, and enlarging it 350 %...We'll fill it in with structure proven in a large cross-section of other full scale Ultralites, so we won't be in uncharted waters.
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Old Jan 25, 2014, 07:49 PM
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United States, TX, Leander
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Way too cool, go for it. I've always thought the Rascal 110 would make a good full scale plane. That would make it a scale plane after that, right?
Edwin
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Old Jan 25, 2014, 08:16 PM
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Atlanta, GA USA
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VERY interesting! I've always wanted to see a "New Ruler" gas free flight scaled up as a full size airplane!

Planeman
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Old Jan 25, 2014, 08:19 PM
team sleprock
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United States, WA, Port Angeles
Joined Dec 2009
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not sure how sound you are of mind! lol I know my wife would commit me if I told her I was building a full scale model!

will definitally be watching!
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Old Jan 25, 2014, 08:33 PM
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United States, MD, Elkton
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We're leaning toward this engine, now 2 cylinder Volkswagen, 37 HP.
I don't like the clockwise rotation though.



Half VW Airplane Engine Test (2 min 54 sec)


WE built one like this for the first Ultralite, 1986..
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Old Jan 25, 2014, 10:23 PM
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Oakland township, Michigan
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Love the sound of the engine. It sounds like an airplane engine. Compared to the 2 strokes normally used it has a much more pleasant sound.

Good luck with the project,

Teo
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Old Jan 25, 2014, 11:52 PM
The Prez....... again
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United States, IA, Rockwell
Joined Jul 2011
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Quote:
Originally Posted by epoxyearl View Post
We're leaning toward this engine, now 2 cylinder Volkswagen, 37 HP.
I don't like the clockwise rotation though.



http://www.youtube.com/watch?v=Xfh17A_0woY

WE built one like this for the first Ultralite, 1986..
You would think a reverse rotation cam shaft would be available from some body.
An old hot rodder like you should be able to find someone to grind a cam for you.

I'm not sure if I should be mad at you or jealous of you. Jealous 'cause you're building a full size and I'm not or mad 'cause your building a full size and I'm not

In any case I'll be rootin' and tootin' for you and this project. I do have one burning question though.... Is this a "scale" build

Ken
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Old Jan 26, 2014, 12:05 AM
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Who's the chicken and who's the egg?
Edwin
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Old Jan 26, 2014, 07:02 AM
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In another thread,I was told in no uncertain terms that a "scale model" just cannot be done.....So no, it won't be scale..

I've already changed the airfoil, added an extra (1/4) window, and shortened the fuselage.

What I did was,disassemble the basic parts of the 110" Rascal, trace around the outlines, and have them enlarged 350%,at my local copy shop.
I spent a couple of months talking with with my Airport cronies and Ultralite owners about the best way to proceed with the design and construction.

Many conversations at RCG about glue joints, epoxies, preparation,and painting prepared me for this.
We increased the wing chord, fattened the airfoil, and will add flaps,small tho',they may be.
All that talk about wood led me to the different woods that can be safely used in this application ...Keep that in mind,as we build.! ...Some of these woods and procedures will not be optimum for airplanes that go over 100 miles per hour...But for an Ultralite with a 55 mph Maximum speed, they are more than adequate.

The most important parts, (spars and wing struts) will be state of the current art materials and procedures..
The glue of choice, and highly recommended, is the 'System Three T-88 epoxy".
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Old Jan 26, 2014, 08:11 AM
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United States, CT, New Milford
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Definitely watching this one Earl!

Good luck, Roger
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Old Jan 26, 2014, 09:08 AM
An itch?. Scratch build.
eflightray's Avatar
South Wales U.K.
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Boy is something that size going to hurt your fingers when you come to checking the CG

Good luck with the project Earl, just a shame it's not electric.
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Old Jan 26, 2014, 09:22 AM
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I'll get two professional wrasslers to pick it up by the wingtips...

And for your viewing enjoyment- more ammunition to defend your electric penchant..
GreenWing, electricaviation.com, e-spyder electric powered light sport aircraft, Aero Expo (10 min 31 sec)


And you don't have to clean it up.!!.45 MINUTES flight time !! 90 minute recharge !! The negatory is the weight...it can't be classified as an Ultralight, but rather a Light Sport....Not a biggie -just sayin'..

I still miss the sound of that engine though..
The video flying starts, a few minutes in.....
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Old Jan 26, 2014, 09:42 AM
ARFs Are Me
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Traverse City, Michigan
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This is going to be fun to watch !
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Old Jan 26, 2014, 12:27 PM
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"Scarf" joints are allowed in airplanes at 8" long, for 3/4 " square stock...I extended mine to 12" for my own peace of mind, and I'd give them a 10 ! Nice looking joints, little glue showing.T-88 epoxy, 24 hour cure time at 80 degrees.
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