1920 DAYTON-WRIGHT No cal

[John Kourbanis]

Thank you Steve!
Weight after sanding is 1,9 grams.
Now i preshrink my tissue paper..the colour is gray as the real plane.

[steve-de24]

John, thanks for the weight info. I would be interested in knowing how much weight the covering adds.
Steve

[lincoln]

I found an earlier incarnation of the following when building my nocal useful:
https://volareproducts.com/new2024/how-to/how-to-don-ss-indoor-nocal-tips/
6 grams for an indoor nocal is heavy! For a really competitive model, you'd want something with a low aspect ratio wing, for a light wing loading. The article by Don Sluszarnick (sp?) discusses this. My Wildcat nocal came in at 3 grams, but a real expert in our club built a Japanese fighter with a somewhat narrower wing which came in, if I remember correctly, at 1.8 grams. Of course the guys in the club decided to add a minimum weight rule.

I suspect that, for a 6 gram nocal, a low asoect ratio with something to address the induced drag might be best. Maybe a big gap biplane, such as the Priesel Kep?: Priesel Kep plan  It's almost as ugly as a Blackburn Blackburn though, and I recall a discussion in which Don wrote that nocal biplanes are hard to trim. I've seen a patent drawing for a ground effect craft with a c-wing, but I don't know if it was supposed to be able to fly OUT of ground effect. David Dodge, a flyer from Connecticut, had a V-173 nocal that flew well, even in a room that was only about 50 feet square. I'm guessing it weighed considerably more than 6 grams, though. Those big props, if turning outward, ought to reduce induced drag, as long as they're not counted as part of the span. If you're not familiar with this ridiculous aircraft, check this out: https://en.wikipedia.org/wiki/Vought_V-173
It was expensive and complicated, but it performed well on relatively low power. I recall reading that it could fly very slowly and was very good at STOL.

[steve-de24]

Lincoln, thanks for the link to the Don S note on No-Cal.
Steve

[John Kourbanis]

preshrink..dope...and dope..and..

[John Kourbanis]

 

[John Kourbanis]

 

[John Kourbanis]

and now the wing..or tomorrow,or after tomorrow    

[John Kourbanis]

wing...

[John Kourbanis]

...

[John Kourbanis]

for easier transportation..

[John Kourbanis]

with some nose weight for a trimming glide..the model is 7 grams..

[John Kourbanis]

and glides beatifully and slow
under the model is his transportation box..

[John Kourbanis]

now it's time for a propeller!