experimental high speed plane

[ezbruh]

I want to make something go really really fast. IDK how it'll work or anything though. I mocked up a design in onshape and put it in airshaper to see what would happen. I set the speed to 200mph and it looks alright but I don't really know what it's supposed to look like. Here is the link to the simulation https://app.airshaper.com/simulations/sim_Zz7qgojGrzxAF1RkBa2YR5ny

 

[ezbruh]

It has a NACA4508 airfoil at the root and a NACA4512 airfoil at the tip, 5 degrees of dihedral, a 40mm edf (specifically this one), a 15 inch wingspan and a 2.25 inch diameter fuselage (sorta because of the weird shape). In the simulation the air went faster on top of the wings and barely slower under them so hopefully Bernoulli's principle does its thing.

 

[ezbruh]

 

[Mr Man]

View attachment 249197
It has a NACA4508 airfoil at the root and a NACA4512 airfoil at the tip, 5 degrees of dihedral, a 40mm edf (specifically this one), a 15 inch wingspan and a 2.25 inch diameter fuselage (sorta because of the weird shape). In the simulation the air went faster on top of the wings and barely slower under them so hopefully Bernoulli's principle does its thing.

You sure a 40mm edf will give enough thrust/airspeed?

 

[ezbruh]

good question. the product listing says it has a max power of 330W burst and 290W continuous and 400g of thrust so probably not the speeds I want but still pretty fast. I might end up making my own motor because I hate my fingertips.

 

[Mr Man]

good question. the product listing says it has a max power of 330W burst and 290W continuous and 400g of thrust so probably not the speeds I want but still pretty fast. I might end up making my own motor because I hate my fingertips.

Looks like you might be able to fit a 50mm in there.

 

[Mr Man]

Don’t forget about exhaust outlet diameter. @L Edge knows more.

 

[ezbruh]

Another thing I might do is mod the edf to have multiple rotors and stators between them to make a jet compressor and direct it through some sort of nozzle (maybe aerospike or de laval) and see if i get more thrust.

 

[Mr Man]

Another thing I might do is mod the edf to have multiple rotors and stators between them to make a jet compressor and direct it through some sort of nozzle (maybe aerospike or de laval) and see if i get more thrust.

I think I’m gonna have another speed plane coming up, as soon as I replace the motor in my High Speed Spitfire, and finish the H-1 Racer.

 

[ezbruh]

Guinness says the wr for edf plane is 306mph. That feels somewhat achievable. maybe...

 

[Mr Man]

View attachment 249236
Guinness says the wr for edf plane is 306mph. That feels somewhat achievable. maybe...

Problem is, as speed increases drag also increases. So to double you speed, you'd actually need 4x the power.

 

[ezbruh]

some physical properties of the current design. frontal area of 9.963360 in². using a material of carbon fiber epoxy 61% it has a mass of 1.2403728 lbs, the CG is here:

and the mass moments of inertia in in² lbs is here:

here is the cg from the bottom view.

 

[Mr Man]

some physical properties of the current design. frontal area of 9.963360 in². using a material of carbon fiber epoxy 61% it has a mass of 1.2403728 lbs, the CG is here:
View attachment 249237
and the mass moments of inertia in in² lbs is here:
View attachment 249238
here is the cg from the bottom view.
View attachment 249239

Are you going to use a model rocket nose cone for that?

 

[Houndpup Rc]

View attachment 249236
Guinness says the wr for edf plane is 306mph. That feels somewhat achievable. maybe...

WOW! Imagine driving that!

 

[ezbruh]

Are you going to use a model rocket nose cone for that?

maybe. Im checking Xometry to see how much it would cost to get it SLS printed in glass filled nylon. I split it so the nose is separate and the fuselage is halved so i could do that.

HOLY

 

[ezbruh]

here is the mass properties with glass filled nylon as the material

 

[ezbruh]

i think my best bet is 3d printing some formers and negatives and making it out of fiberglass composite. waaaaay cheaper and still very light and strong but fiberglass dust is scary.

 

[AIRFORGE]

maybe. Im checking Xometry to see how much it would cost to get it SLS printed in glass filled nylon. I split it so the nose is separate and the fuselage is halved so i could do that.
View attachment 249240
HOLY

At that price, you can get 2, maybe 3, right?!!

 

[ezbruh]

At that price, you can get 2, maybe 3, right?!!

bulk discount isn't helping...

 

[AIRFORGE]

bulk discount isn't helping...