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Mid-Wing Cub Style Design

#1
Hi,

I'm planning on converting my cub style trainer to a mid wing.
I will use the same fuselage and move the wing to around midpoint of fuselage.
I will however use a different wing style. I'm thinking about using a KFM3 wing foil.
debating if I should taper the tail edge of the wing or not.

Check out what it will look like so far.
Still gathering parts and will begin construction this month.

any thoughts or suggestions?
RC Plan Design 001-18inch Wing Span.jpg
 
#3
Here is my progress so far.

Specs
Wingspan = 30" Kfm3 wing w/ 2" dih.
Fuse = 21.5"
motor = unknown
Transmitter = Flysky Fs-i6

construction is Dollarama Foamboard.
its is a concept of a Cub style trainer with a mid wing design.

let me know your thoughts and comments, any improvements, I'm open as I also have some design improvements for v2.

thanks

Loco

Kfm3 wing airfoil
great wing to build. but I didnt intend to put ailerons on but now I do. so now I have to figure out how to install one without building a new wing. either way it turned out great !
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wing with a 2" rise
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cutting out template from foamboard
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got the paper template and foamboard ready to be prepped.
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always 90 degrees
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finished gluing the sides of the fuselage
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test fitting the wing, why is it always you try one side of wing and give you trouble for 5 mins...then hou try the other way other side and its smooth like butter!
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top cover cutout
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had to make modifications to the way I was going to join the stabilizers. I broke the original slot arms. so I had move the item forward a bit
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got the templates cut out ready to bevel
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fake engine design take from the FT Sportster
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have been making many changes to the rudder design. still not liking it.
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double sided tape to test out fake engine look.
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#5
Decided I wanted to redesign the tail today. specifically the rudder.

I was concerned I didnt have enough surface area so I enlarged it by roughly 1.5inches wider. with a curve. I feel more comfortable now with it.

I borrowed the profile from my Simple Scout template.

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#7
Looks really good, how about releasng build plans :)?
Hi Mayan!

First off, have to say I love your Tiny Trainer turned Warbird. Great mod!

I'm planning to release the plans just when I finish and it flys lol. But if you want I can send them as is. I do have to make some adjustments as I made some as I was building it. Give me a week and I will post the plans I have so far as version 1. Still thinking of a name for it.



Loco
 

mayan

Well-known member
#8
Hi Mayan!

First off, have to say I love your Tiny Trainer turned Warbird. Great mod!

I'm planning to release the plans just when I finish and it flys lol. But if you want I can send them as is. I do have to make some adjustments as I made some as I was building it. Give me a week and I will post the plans I have so far as version 1. Still thinking of a name for it.



Loco
Thanks. I’ll be waiting for a final version as I told Hai-Lee I have to fly and crash something so I have more room for something new. I want to build the das ugly stick too.
 
#9
I put the servos in today., well after considering I only bought 7 inch push rods I had to out push rods in the rear tail.
hoping it wont end up tail heavy.

i really like these snap on servos horns

I also heard of someone using popsicle sticks as a firewall...so I laminated a firewall together...hope it works lol 20190215_232703.jpg 20190215_232708.jpg 20190215_224917.jpg 20190215_224129.jpg 20190215_224129.jpg 20190215_230113.jpg 20190215_230120.jpg
 
#11
Don't forget to put the screws in you servo arms, also, I would suggest something a little stronger for the firewall, I would suggest eighth inch ply.
yes good call I will put the screws in and reinforce the other side.

regarding firewall good idea.

I did however double layer popsicles sticks I alternate direction making a ply. you dont think this will work?
 
#14
It might work and I’m not going to tell you not to use it, I’m only saying it won’t last as long (firewalls break pretty often in a hard crash anyways though, so it might actually work just as well). Nothing in this hobby is set in stone, so try it and let us know how it goes ;).