Anybody else scratch building tonight?

[Mr Man]

Came across some photos of a tracked P-40, anybody know anything about this plane?

A very interesting story, might try it sometime…. https://www.afmc.af.mil/News/Article-Display/Article/1919691/history-of-aircraft-track-landing-gear/

 

[Houndpup Rc]

A very interesting story, might try it sometime…. https://www.afmc.af.mil/News/Article-Display/Article/1919691/history-of-aircraft-track-landing-gear/

Yeah, that is interesting...Maybe try it in the winter!

 

[Mr Man]

Yeah, that is interesting...Maybe try it in the winter!

Yeah, it’d be awesome! Maybe if I do a mega P-40….

 

[Houndpup Rc]

Yeah, it’d be awesome! Maybe if I do a mega P-40….

 

[Mr Man]

Hehe

 

[short_nathan]

Yo, guys, I couldn't find the "Anybody Else disigning tonight?" thread, so I'll say it here. I've been wanting to design a plane, and I like it, but the one thing that keeps me from putting my designs on the air is Airfoils. I can't design them. And I have an upcoming A-20 project, and the one thing I'm scared about is making the airfoil. How do I design airfoils? Proper ones?

 

[Mr Man]

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[short_nathan]

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Thanks @Mr Man

 

[Flying Monkey fab]

Yo, guys, I couldn't find the "Anybody Else disigning tonight?" thread, so I'll say it here. I've been wanting to design a plane, and I like it, but the one thing that keeps me from putting my designs on the air is Airfoils. I can't design them. And I have an upcoming A-20 project, and the one thing I'm scared about is making the airfoil. How do I design airfoils? Proper ones?

First, you attend college for four years and become an aeronautical engineer, and then you start a postgraduate program.

OR you can do what everyone else does and copy what works, follow a few rules of thumb, and get to it. Just in the FT designs there are dozens of airfoils that work well.

I take it you don't have a wind tunnel so be prepared for some trial and error as well.

 

[short_nathan]

First, you attend college for four years and become an aeronautical engineer, and then you start a postgraduate program.

OR you can do what everyone else does and copy what works, follow a few rules of thumb, and get to it. Just in the FT designs there are dozens of airfoils that work well.

I take it you don't have a wind tunnel so be prepared for some trial and error as well.

There is holding the wingtip on one hand and spinning around and seeing how much it lifts, bot the airfoil and your breakfast! 🤣 🤣

 

[short_nathan]

By the way, does the P-40 or P-51 wing look close enough to the A-20's?

 

[Mr Man]

By the way, does the P-40 or P-51 wing look close enough to the A-20's?

Well honestly, neither…. The P-40 is closer, but the A20 has a straight leading edge, while the p-40 sweeps back a bit

 

[Flying Cherokee]

First, you attend college for four years and become an aeronautical engineer, and then you start a postgraduate program.

OR you can do what everyone else does and copy what works, follow a few rules of thumb, and get to it. Just in the FT designs there are dozens of airfoils that work well.

I take it you don't have a wind tunnel so be prepared for some trial and error as well.

This made me laugh

I would fall into the last category..........

 

[Piotrsko]

Well firstly it is model scale so all the research and published data doesn't necessarily apply...... TLAR engineering works good enough. Stories of making huge stacks of ribs, of wings made exactly the same way and all the planes flew different

 

[Houndpup Rc]

This made me laugh

I would fall into the last category..........

Yup, me too! 😂

 

[tomlogan1]

Not a scratch build, but programming differential thrust and setting up the ailerons to combat adverse yaw was as much work as building. I did assemble it, though. Always wanted one and it flys well. Once all the setup for dif thrust & yaw control, it flys easily. Very happy to have it.

 

[Houndpup Rc]

Not a scratch build, but programming differential thrust and setting up the ailerons to combat adverse yaw was as much work as building. I did assemble it, though. Always wanted one and it flys well. Once all the setup for dif thrust & yaw control, it flys easily. Very happy to have it.

Very nice looking!!!

 

[tomlogan1]

Everybody has heard of a "barn find". The story is you find a rare vehicle in an old barn and buy it for little or nothing. Same deal here but with a different vehicle. My buddy finds all kinds of orphan planes and this one was a throw away. Plug cut off the ESC, no information on what kind of receiver, if any, and how to access it. Fortunately, Youtube has enough videos that you can probably find out anything.

After that it was just like building any plane. New receiver, new ESC and assigning channels and creating the necessary mixes.

Here's my "barn find" which I dedicate to Mr. NCT who shared his foam board design of the same plane some time back.

 

[bisco]

Not a scratch build, but programming differential thrust and setting up the ailerons to combat adverse yaw was as much work as building. I did assemble it, though. Always wanted one and it flys well. Once all the setup for dif thrust & yaw control, it flys easily. Very happy to have it.

beautiful! what is it?

 

[tomlogan1]

beautiful! what is it?

PBY Catalina