CARBON FIBER DISCUSSION

[Zoom Master]

Could you talk about your flying background and explain how you are going to train yourself to be ready to do 200mph and the goal of 300mph?

Well I'll tell the whole story on how I got into flying from the very start

THE BEGINNING
I flew my first ever rc airplane about a year ago. My first ever rc airplane was a cheap 2 channel foamy that u can find at any of ur local toy store. When Iflew it for the first time it light a spark in me because how fun it was flying that airplane. And after that I got into building rc airplanes.

LEARNING HOW TO FLY
Before say a month or 2 ago u could have said I have zero flying experience but that was until I built a trainer airplane. After getting some flight time on that airplane and learning the basics I then proceeded to build a Foam board F22. After that I built a t45 hawk. (or something similar to that plane)

HOW IM GONNA TRAIN MYSELF
To train myself to be able to fly at 200 mph I asked a friend to let me fly his old edf jet it went around 120 mph and I had officially broken 100 mph. After that I have very recently flown a E flite v1200 which I was able to hit around 150-160 mph with. So I should be able to handle 200 mph. And as for how im gonna train myself for 300 mph......let's just cross that bridge when we get to it !

 

[Zoom Master]

This is what I’ve got for the plane that will go both 200 and 300 mph !

There is gonna be one version that will be made out of foamboard that will go 200 mph and I will make another version that is made of carbon that will hopefully go 300. The one thing im not sure on is the wing shape this is how the wings look like right now

 

[Piotrsko]

Hooray somebody elses are saying how hard 300 is......

That isn't necessarily a 300 mph design, might need some sweep and more taper to the wing. Won't know until above 250. 737's and bunches of private jets fly around 500. Consider that a design hint.

 

[Zoom Master]

Hooray somebody elses are saying how hard 300 is......

That isn't necessarily a 300 mph design, might need some sweep and more taper to the wing. Won't know until above 250. 737's and bunches of private jets fly around 500. Consider that a design hint.

True I kinda figured that this may not be capable of 300 but it is probably gonna hit 200 and yeah I’ll go and maybe change up the wing design a bit and I’ll show u what i have in mind.

 

[Zoom Master]

Hooray somebody elses are saying how hard 300 is......

That isn't necessarily a 300 mph design, might need some sweep and more taper to the wing. Won't know until above 250. 737's and bunches of private jets fly around 500. Consider that a design hint.

True I kinda figured that this may not be capable of 300 but it is probably gonna hit 200 and yeah I’ll go and maybe change up the wing design a bit and I’ll show u what i have in mind.

This is what I want my wing to look like.

According to some YouTube video this plane has hit about 370 mph.

 

[Zoom Master]

This is what I want my wing to look like.
View attachment 252267
According to some YouTube video this plane has hit about 370 mph.

True I kinda figured that this may not be capable of 300 but it is probably gonna hit 200 and yeah I’ll go and maybe change up the wing design a bit and I’ll show u what i have in mind.

Hooray somebody elses are saying how hard 300 is......

That isn't necessarily a 300 mph design, might need some sweep and more taper to the wing. Won't know until above 250. 737's and bunches of private jets fly around 500. Consider that a design hint.

I mean I know how hard it is to hit 300 mph it is quite a difficult task and Im not expecting to hit 300 with my first design but if I dont hit 300 mph with this design I should probably be able to get pretty close though like get to 250 mph. The reason im quite confident that I can go 300 mph is because im not designing an airframe from scratch and designing a 300 mph frame from the ground up. Im basically just more or less copying these types of speedwings (the one in the picture above) and making them myself. So thats why im more less sure that in a few attempts and by tweaking the design a bit and putting some super powerful motors on here I should be able to get there.

 

[Zoom Master]

I mean I know how hard it is to hit 300 mph it is quite a difficult task and Im not expecting to hit 300 with my first design but if I dont hit 300 mph with this design I should probably be able to get pretty close though like get to 250 mph. The reason im quite confident that I can go 300 mph is because im not designing an airframe from scratch and designing a 300 mph frame from the ground up. Im basically just more or less copying these types of speedwings (the one in the picture above) and making them myself. So thats why im more less sure that in a few attempts and by tweaking the design a bit and putting some super powerful motors on here I should be able to get there.

This is the opposite to what I was trying to do before with my 400 mph rc plane. Im not trying to design anything original like before. Im simply copying the design of some of these speedwings. And I know 300 is quite the stretch a very small percentage of these airplane are even able to break the 300 mph barrier but im willing to give it a try even if it takes me a few thousand dollars and building multiple airframes im still willing to give it a try just to see if I can actually do it. I know if I give up now im gonna regret it later and wonder what would have happened if I actually went through with building it. Could I have broken 300 ? I know its quite unrealistic but I like to do things just for pure fun and this is one of them I know I can go and buy an off the shelf speedwing that can 300 mph but where is the fun in that ?

 

[telnar1236]

This is what I’ve got for the plane that will go both 200 and 300 mph !

View attachment 252249
There is gonna be one version that will be made out of foamboard that will go 200 mph and I will make another version that is made of carbon that will hopefully go 300. The one thing im not sure on is the wing shape this is how the wings look like right now View attachment 252250

Should be a fine design for 200 mph or 300 mph with some refinement, or even probably ok for 400 mph. The big thing I'm noticing is the way the wings are modeled, the leading edge is square here which is pretty draggy.

It also looks like the airfoil might be a bit strange, both on the tail and wing, but it's hard to tell. Finally, rounding the edges on the body will reduce their tendency to generate vortices and reduce drag.

 

[Zoom Master]

Should be a fine design for 200 mph or 300 mph with some refinement, or even probably ok for 400 mph. The big thing I'm noticing is the way the wings are modeled, the leading edge is square here which is pretty draggy.
View attachment 252292
It also looks like the airfoil might be a bit strange, both on the tail and wing, but it's hard to tell. Finally, rounding the edges on the body will reduce their tendency to generate vortices and reduce drag.

U are surprisingly correct about the wings yes the wings are super blocky from the end but thats not a design choice thats just how the wings came out in fusion for some reaoson but the leading edge will be flat. And the airfoil for both the wing and the vertical stab is just something I came up with on the spot the airfoils im actually gonna use are way different. And yes I will round out all the sharp edges on the body.

 

[Zoom Master]

U are surprisingly correct about the wings yes the wings are super blocky from the end but thats not a design choice thats just how the wings came out in fusion for some reaoson but the leading edge will be flat. And the airfoil for both the wing and the vertical stab is just something I came up with on the spot the airfoils im actually gonna use are way different. And yes I will round out all the sharp edges on the body.

Im also changing the shape of the wing and the horizontal stab to something a bit more aerodynamic.

 

[Zoom Master]

Should be a fine design for 200 mph or 300 mph with some refinement, or even probably ok for 400 mph. The big thing I'm noticing is the way the wings are modeled, the leading edge is square here which is pretty draggy.
View attachment 252292
It also looks like the airfoil might be a bit strange, both on the tail and wing, but it's hard to tell. Finally, rounding the edges on the body will reduce their tendency to generate vortices and reduce drag.

And another thing im not really expecting to reach 400 with this design I highly doubt I will be able to reach even say 350 with the Streacker RS motor im planning on using to get to 350 or 370 I will probably need a scorpion motor. (the motor mostly used in the big monster) I might actually be able to reach 400 with a turbine on top but im not buying a turbine anytime soon.

 

[Piotrsko]

The inportant portion of design  isnt how something looks, it is WHY it looks that way. Hoerner tips on a straight wing, ALA P51....except for this annoying tendency to wing tuck explode, bunches went sonic in WW2 during dives along with P38's and test jets after the war. F104 was designed to be sonic but has a bit more thrust than you have.

 

[Zoom Master]

The inportant portion of design  isnt how something looks, it is WHY it looks that way. Hoerner tips on a straight wing, ALA P51....except for this annoying tendency to wing tuck explode, bunches went sonic in WW2 during dives along with P38's and test jets after the war. F104 was designed to be sonic but has a bit more thrust than you have.

True but I personally dont like how my wings look.

 

[Zoom Master]

True but I personally dont like how my wings look.

Im gonna make the shape of the wings and the horizontal stab the same

 

[Zoom Master]

The inportant portion of design  isnt how something looks, it is WHY it looks that way. Hoerner tips on a straight wing, ALA P51....except for this annoying tendency to wing tuck explode, bunches went sonic in WW2 during dives along with P38's and test jets after the war. F104 was designed to be sonic but has a bit more thrust than you have.

Im gonna try to make the design perfect the first go so I dont have to build multiple versions so thats why im taking my time designing this airplane.

 

[Zoom Master]

And I also need some help deciding where I should put my vertical stabilizer.

Should I put the vertical stab on top of the airframe like this ?

or should I lower it and connect it to the very end of the airframe like this ?

I know the stab looks a bit weird but if I decide to put the vertical stabilizer on the very end ill make it so it is thinner and joins seamlessly with the airframe.

 

[Mr Man]

1st pic I think...

 

[Zoom Master]

1st pic I think...

Hmm alright.

 

[Zoom Master]

1st pic I think...

Im also gonna be making the wing pretty thin. So im planning on using a pretty thin airfoil for the plane something like this.

And also im gonna order the parts and get started building my speedwing soon ! (hopefully) So now im gonna go and finalize my design and finalize all the parts for the airplane and then order them !

 

[Zoom Master]

Im also gonna be making the wing pretty thin. So im planning on using a pretty thin airfoil for the plane something like this.
View attachment 252313
And also im gonna order the parts and get started building my speedwing soon ! (hopefully) So now im gonna go and finalize my design and finalize all the parts for the airplane and then order them !

And I also am trying to figure out how do I mount my horizontal stab on the top of my vertical stab ?