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Dec 14, 2015, 06:16 PM
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XDmToter's Avatar
Build Log

MPF Drak 48 with Plans and Video

I'd like to share my latest project with you. The Drak has captured my interest since the first time I saw the prototype. Being a Foamie Scratchbuilder, I wanted to come up with my own derivative with a similar planform.
This is intended to be used for FPV. There is a lot of room for gear, and plenty of wing to lift it.
The build technique is similar to an Armin wing, in that the skin is a single piece which is wrapped around the internal structure. Where this design differs from the Armin wing is that I am using wing ribs in addition to a spar.
The wings will be removable for ease of transportation.

Wing Area: 500 sq in (including fuselage)
Wingspan: 48"
Length: 23.5"
Weight: 28.5 oz (810 g)

2 Sheets - Model Plane Foam
3 x 4mm OD x 2.5mm ID x 1 Meter Carbon Tube
3 x 2mm OD x 1mm ID x 1 Meter Carbon Tube
2 x 1.5mm OD x 1 Meter Carbon Rod
Packing Tape

Electronics (subject to change):
Motor: Suppo 2212/10 1400Kv
ESC: 30 Amp
Prop: 8x4E
Battery: 3200Mah 3s
2 x 9gm or 12gm Servos
3+ Channel Receiver

Below are some CAD Renderings of the model:


Plans added in post #63

Congratulations to Scrutucks on his successful maiden!

D.I.Y Drak maiden flight (1 min 54 sec)
Last edited by XDmToter; Oct 27, 2018 at 04:46 PM. Reason: Edit thread title.
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Dec 14, 2015, 06:17 PM
Registered User
XDmToter's Avatar
Here is the beginning of the build log. I was able to nearly finish the fuselage section today.
I am using both Gorilla Glue White, and Hot glue for this build.

I am using 1.5mm Carbon rod for reinforcing the fuselage.

I am using 4mm x 2.5mm Carbon tube for the spars.

I will then use a 2mm Carbon rod inserted into the spars when attaching the wings to the fuselage.

The foam is all Model Plane Foam, CNC Cut by DZ1SFB
Last edited by XDmToter; Dec 20, 2015 at 05:20 PM.
Dec 14, 2015, 06:18 PM
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XDmToter's Avatar
I was able to make some progress on one of the Wings today. See the pictures and captions below.

I have yet to install the hooks for the bands that will hold the wing on.
I also need to install the servo, control horn, and linkages.

With any luck, I will be able to build the starboard wing soon, and start installing the electronics.


Edit: Adding photos of the wing attachment.
Last edited by XDmToter; Jan 25, 2016 at 09:24 PM.
Dec 15, 2015, 03:24 AM
serial scratchbuilder
Granted's Avatar
Nice work! Will you be offering plans?
Dec 15, 2015, 05:24 AM
Registered User
XDmToter's Avatar
Thank you! I'm still working out some details, and correcting some errors. But if it proves to be a good flyer and a structurally sound design, then Yes; I will be posting the plans.
Dec 20, 2015, 12:20 AM
Ken's CAD Models
dz1sfb's Avatar
Ah, found it! Looking sharp.

Dec 20, 2015, 12:31 AM
skumgummi dave
Enjoying the Drak clone build! Good on ya.

Dec 20, 2015, 03:09 PM
Registered User
XDmToter's Avatar
Thanks Guys. I'll try to get some more progress done on this as soon as possible. Unfortunately very busy at work these days.

Now that I have the parts in front of me, I think I designed the Elevons a bit small. They looked bigger in CAD for some reason. I'm going to make those a bit bigger than my original plan.

Hopefully I'll have more to post by next weekend.
Dec 21, 2015, 10:51 PM
You're killin' me Smalls
BrownEyedFool's Avatar
Dec 22, 2015, 05:13 AM
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XDmToter's Avatar
I updated my post above to include pics of the Wing Build.

Stay Tuned. I am eager to get this one finished. It is coming out nicely so far.

Dec 22, 2015, 08:25 AM
Registered User
I like your building technique. Subbed
Dec 22, 2015, 03:01 PM
Jer. 29:11
jeffsch's Avatar
Great construction techniques. Thank you for the detailed build steps and pictures!
Dec 27, 2015, 10:16 PM
Mum is the word!
Nice build!
Dec 29, 2015, 01:09 PM
4446's Avatar
Nice work! Subbed. Looking forward to seeing this in the air! Turning out successful, think about offering a kit too...

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