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New Flight: Pitts -Skelton Aerobatic model  (page 9) - Page 7 Babe_b10
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New Flight: Pitts -Skelton Aerobatic model  (page 9) - Page 7 Empty

New Flight: Pitts -Skelton Aerobatic model (page 9)

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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  1/2A Nut on Tue Jun 30, 2020 7:14 pm

Stats:

New Flight: Pitts -Skelton Aerobatic model  (page 9) - Page 7 Static14

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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  GallopingGhostler on Tue Jun 30, 2020 8:28 pm

Basically you are saying, 1/2A Nut, Enya .09-III TV or unmuffled Medallion .09 R/C throttle ring power. Flying a Plane
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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  MauricioB on Tue Jun 30, 2020 10:02 pm

Thanks Brad for your time! Here are the screenshots.
New Flight: Pitts -Skelton Aerobatic model  (page 9) - Page 7 Helice10
New Flight: Pitts -Skelton Aerobatic model  (page 9) - Page 7 Helice11
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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  MauricioB on Tue Jun 30, 2020 10:07 pm

Kim wrote:Looking Great, Mauricio !!!!!!!!!!!!

Kim, it is an honor for me that you are here too! ... Sincerely! Beer Cheers Clapping
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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  1/2A Nut on Tue Jun 30, 2020 11:03 pm

What is the all up weight and total square inches of the combined wings?

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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  MauricioB on Wed Jul 01, 2020 8:44 am

1/2A Nut wrote:What is the all up weight and total square inches of the combined wings?

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Comparison between PITTS and BI-HAWK

PITTS
Wingspan: 29.8 inches (top wing)
Wingspan: 21.02 inches (bottom wing)
Fuselage length: 19.88 inches (including rudder)
Engine: Norvel .061 r / c
Radio: 4 channels (engine, spoilers, rudder, depth)
Weight: 630 grs = 22.2226 zz

BI-HAWK
Wingspan: 30.11 inches (top wing)
Wingspan: 25.98 inches (bottom wing)
Fuselage length: 21.65 inches (including rudder)
Engine: Cox Medallion .049 r / c
Radio: 4 channels (engine, spoilers (lower wing only), rudder, depth)
Weight: 554 grs = 19.54 oz


Wing load PITTS S-1:
New Flight: Pitts -Skelton Aerobatic model  (page 9) - Page 7 Carga_10
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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  MauricioB on Wed Jul 01, 2020 11:50 am

Bi-Hawk
A1 = 765 mm x 120 mm = 91800 mm2
A2 = 660 mm x 120mm = 79200 mm2
A1 + A2 = AT = 91800 mm2 + 79200 mm2 = 171000 mm2
171000 mm2 to in2 = 265,05053 in2
Alar Load = Weight / Total Area = 554 grs / 265,050 = 2,090 grs / in2
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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  1/2A Nut on Wed Jul 01, 2020 8:48 pm

Thank you Mauricio Popcorn

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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  MauricioB on Wed Jul 01, 2020 9:38 pm

1/2A Nut wrote:Thank you Mauricio  Popcorn

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You have taught me a lot of friend, it is a pleasure to share information here!
What do you think? .... do you like the wing loading of the Pitts ??
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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  1/2A Nut on Wed Jul 01, 2020 11:04 pm

Yes will be faster with more acro ability / will act like a Pitts.
Needs a .074 to hover on the prop but the .061 should make
it dance well.

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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  MauricioB on Sun Jul 05, 2020 10:58 am

Thanks Brad Very Happy !, I think the Norvel .061 r / c will take it very well, I think it is a more similar relationship to the real flight, but anyway everything is to see what happens at the time of the flight.
I will be measuring the pulling force of the motor shortly.
Due to the restrictions in my city (Covid 19), I must wait for the appropriate moment to go flying ...
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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  1/2A Nut on Sun Jul 05, 2020 8:01 pm

APC 6x4 Sport Propeller is a very good 1/2A prop for thrust and reasonable pitch speed:
New Flight: Pitts -Skelton Aerobatic model  (page 9) - Page 7 51xlze10

The Norvel AME .061 should make around 17.5 oz thrust/ 65 mph pitch speed



AP .061 RC / APC 6x4 gas sport prop / 16,795 rpm / 17oz thrust
Static: 64 mph pitch speed / .176 hp - 131.3w
25% nitro / 20% castor oil.

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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  MauricioB on Mon Jul 06, 2020 11:07 am

Thanks friend for this valuable contribution, I do not have the possibility to get the APC 6x4, here everything seems to get a little more complicated Crying or Very sad .
Here are my tests with my available propellers:
New Flight: Pitts -Skelton Aerobatic model  (page 9) - Page 7 Ph11
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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  1/2A Nut on Tue Jul 07, 2020 9:50 am

Lovely data

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New Flight: Pitts -Skelton Aerobatic model  (page 9) - Page 7 Ph1111


Last edited by 1/2A Nut on Tue Jul 07, 2020 9:39 pm; edited 1 time in total
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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  duaneh on Tue Jul 07, 2020 1:11 pm

Umm... Am I reading this right?

The APC 6x3 ran 17790 RPM, and has a pitch speed of 40
The MA 6x3 ran 15930 RPM, yet outran the APC with a pitch speed of 60.3?

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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  1/2A Nut on Tue Jul 07, 2020 9:40 pm

Fixed thank you.

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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  getback on Wed Jul 08, 2020 11:05 pm

Very Impressive my Friend !! RC Plane
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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  GallopingGhostler on Wed Jul 08, 2020 11:15 pm

1/2A Nut wrote:APC 6x4 Sport Propeller is a very good 1/2A prop for thrust and reasonable pitch speed:
New Flight: Pitts -Skelton Aerobatic model  (page 9) - Page 7 51xlze10

Just curious, but that looks like an "E" (electric) prop. Is it? Is the prop strong enough to withstand the impulses of a nitro glow motor?
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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  1/2A Nut on Thu Jul 09, 2020 12:07 am

It is a glow sport prop perfect for 1/2A

I have ran it with a AP .061 / Norvel .074 /  TT GP .07 and SH .07  

https://www.apcprop.com/product/6x4/

- on the site scroll down for related props.



Note during testing the most static load to date put on APC 6x4 sport
Norvel .074 Kamtechnik Turbo Plug  
19,864 rpm / 23.3oz thrust / .292hp - 214w / 75.2 mph pitch speed
+ 1,211 rpm
Vs
Norvel's upgraded Turbo Plug adapter / APC 6x4
18,653 rpm / 21oz thrust / .242hp - 181w / 71 mph


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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  MauricioB on Sun Jul 12, 2020 1:00 pm

And yes friends! The great moment has arrived!
After several attempts to take off, I had to make the following corrections:
1) propeller change, needed more traction.
2) minimization of controls on all controls.
3) Incidence of the upper wing 1 degree, lower wing 0 degrees, stabilizer 0 degrees.
4) Let it run for many meters, the grass track slows it down a lot, so there is no need to rush, just let it go and touch the elevator gently.
5) The Norvel .061 motor takes it very well, although it fits perfectly, maybe a .074 or more motor, you could have fun doing crazy things.
Conclusion: I AM HAPPY! nothing more to add!
To my brothers, especially José Emilio, Lucio and all of you my love and gratitude, for being there, for being part of this, God bless you!
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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  getback on Sun Jul 12, 2020 2:19 pm

I E-kiA!! Great flight !! Very Happy for you to go fly with the new bird and come home all in one piece !! Love the sound with the full cowling / engine Very happy for you Friend!! Large Hug!! and enjoyed the build thread !! What prop did you decide on ? Very Happy Very Happy Very Happy Very Happy Very Happy
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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  balogh on Sun Jul 12, 2020 3:40 pm

Congratulations Mauricio very nice flight and model. I am glad you could finally do the maiden flight despite Covid!🍾Beer Cheers
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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  1/2A Nut on Mon Jul 13, 2020 12:00 am

So happy to see the plane has made it through the trim flights MauricioO!

Looks like the mighty APC 6x3 by design proved to be a fast rev / top thrust prop.
Low drag prop tips to get the bird up and away.

What size wheels are those?

Can you go up a bit in diameter to reduce take off distance and
allow other props to get it in the air.

Modified APC 7x4.1SF prop to 6.75x4.1N / 14,600 rpm 567g / 20oz thrust / 57 mph pitch speed.  Smile
New Flight: Pitts -Skelton Aerobatic model  (page 9) - Page 7 Lp070410

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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  Mike1484 on Mon Jul 13, 2020 8:44 am

FANTASTIC !!! Really enjoyed the build and video of the flights .  cheers

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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

Post  MauricioB on Thu Jul 16, 2020 8:00 am

THANKS GUYS!!! Very Happy  Beer Cheers  Beer Cheers  Clapping  Clapping
Well, I am experimenting with new propellers, this time a Master 7 x 4 G3, it seems to go very well in static, the engine reaches 11500 rpm with a force of 410 grams. It will be a matter of testing in flight.
I have also changed the anchors of the upper wing, the material used before is very hard, but brittle at the same time, so I made all that new with MIDWEST wood that will certainly last forever.
I will continue to share the progress.
Brad, what do you think about cutting the propeller? APC I don't have in STOCK
New Flight: Pitts -Skelton Aerobatic model  (page 9) - Page 7 A10
New Flight: Pitts -Skelton Aerobatic model  (page 9) - Page 7 20200713
New Flight: Pitts -Skelton Aerobatic model  (page 9) - Page 7 20200715
New Flight: Pitts -Skelton Aerobatic model  (page 9) - Page 7 20200714

Another good news is that Mary from Outerzone (  https://outerzone.co.uk )has updated the page with the images and data of my Pitts, so maybe more friends want to make one! : https://outerzone.co.uk/plan_details.asp?ID=6495
I'll keep up with the news!
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Happy Re: New Flight: Pitts -Skelton Aerobatic model (page 9)

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