stunthanger.com
Speed,Combat,Scale,Racing => Scale Models => Topic started by: Robert Zambelli on July 08, 2011, 09:37:03 PM
-
John Brodak did extremely well in scale this year.
With his spectacular Shoestring, he scored National Champion in Sport Scale and high static score in the same event.
Congratulations John - you earned it!!
Bob Z.
-
Atta boy John. How about some pictures so the rest of us poor folk who couldn't attend, can see? H^^
-
Great going John, This is pictures from the 2010 NATS. I guess it's the same Shoestring. Looked really good in 2010. Sure it looked even better in 2011.
#^ H^^
-
Here are some details of the Shoestring.
Although he used a stock muffler for competition, the exhaust system shown in the pictures is fully functional.
Bob Z.
-
He has worked hard for this event and is well deserved. More pictures on the NATS NEWS. Address is in the post about more pictures of the NATS.
-
woooow %^@ H^^
-
Very nice model indeed. Where did the spinner come from?
-
Not to take anything away from John Brodak, but I did not know this airplane was ever white. I thought it was chartreuse until the 70's when it was painted light blue.
-
Not to take anything away from John Brodak, but I did not know this airplane was ever white. I thought it was chartreuse until the 70's when it was painted light blue.
===================================
Been wondering the same thing myself . . .
-
It's not white. It's a light chartreuse color (in person). Maybe a little more apparent here, but it is a subtle shade.
John
-
Wayne - I custom mold many of John's spinners. You can read about the process in CL World.
I also machine the backplates from either engineering plastic or aluminum.
They are ultra-light. Here are a few shots from the process.
Bob Z.
-
That's pretty impressive Bob, I like it! y1
-
I am still laughing at what you use on the mold. H^^
-
What? You never put a condominium on your nose? LL~ H^^
-
I designed John's Shoestring approximately 3 1/2 years ago. It has about 650 squares and the target weight was to be close the 70 ounce range. The idea was to design and build a plane the way a stunt person would. I have been a co-judge at the NW Regionals and am dismayed how many scale modelers must use oak and Bondo. My fellow judge Mark Scarborough have been wondering why these planes are such loafs. When I designed the Shoestring, the goal was to keep it light. Mission accomplished! John says it is a breeze to fly.
The latest Scale design is a Little Tony/Cosmic Wind which John has finished. This one is the same wing area and same weight as the Shoestring. Guess how it will fly?
Bottom line if you are designing a scale plane, design all the parts to where you will think they are too lightly built. You will probably be wrong. The good thing is that lighter parts demand less structural support in the other components, lighter landing gear, lighter engines, etc, etc, etc. It ends up snowballing to where you end up with a feather. Remember, feathers fly, bricks don't.
Another thing as long as I am on a roll. To overbuild something because you want it to survive a crash is the wrong attitude and becomes the worst possible way to create a scale plane. Then all the components get overbuilt and the end product is a brick which becomes a self fulling prophecy. Think light and feathers rarely crash.
Pat Johnston
Scale Design Technology
Skunk Works
-
I keep telling myself the same thing while building the P-47. Only parts to create are the cowl, top nose block and the rudder to bemounted on the plane. Then it is the sand paper time which will be done out doors in the shade. Hope the RO-Jett .40 BSRE will be enough for it. It pulls the Accentor like a Rat Racer at 9,000 rpm. H^^