4 meter Plank - Build thread

[thenated0g]

 

[Wildthing]

Amazing.

 

[bracesport]

super ambitious but built like a pro - learning more and more from you with every build!

 

[thenated0g]

Been slowly sanding/filling the transition on the tail.


Last servo about to go in the wing.


And started working on the wing saddle that will get epoxied to the fuselage.

 

[bracesport]

some more good progress - I was thinking that big wing would need good centre support!

 

[bracesport]

you think big, but there's always room for more!

 

[Wildthing]

you think big, but there's always room for more!

That is very impressive, love the fold away motor

 

[thenated0g]

wing saddle epoxied to fuselage. I still need to add some more filler in key places and fiberglass at seams. Came out at 2mm of S-Glass.

 

[thenated0g]

Painted

 

[thenated0g]

 

[thenated0g]

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View this content on Instagram

Few things done this weekend.
Left side wiring all done, see video above. One thing i gotta say about these $40 servos they are FAST. And this is only on 6v. On 8.4 they must be nuts.


Heres how the fuselage looks with wing mount holes:


And the threaded holes in the left wing.


Right side electronics is about 15 minutes from being done.
After that i just need to remeasure dimensions to recheck CG. Based off all my previous DIY builds i am going to guess that while there are differences from my original plans the change to estimated cg will be minimal, but always, if for nothing than else than peace of mind, i like to recheck everything.

And than i can put the plane all together and see how much weight i need in the nose. Based off needed weight i will either use 2x 26800's or 2x 18650's in 2s configuration. That would be 230g vs 100g.

 

[bracesport]

great progress!

 

[bracesport]

I have not progressed to the super fancy servos - just yet!

 

[thenated0g]

Finally got all the wiring done. Couple few cosmetic stuff to do but close enough to start working on cg and electronics in the fuse.



Dropped in 110g of lead and epoxy. Heres those 28600's for size.

 

[thenated0g]

This for my own reference for later. Kind of funny, been using this for years and just realized you could get a link that takes you back to it anytime. I have redone this from scratch like 10 times.

http://wingcgcalc.bruder.com.br/?un...p5=0&angle5=0&panelspan6=0&chord6=0&sweep6=0&

 

[bracesport]

@thenated0g - what is the mAh rating on those bad boys?

 

[thenated0g]

6800mah 30a, per cell, so its a 2s 6800mah 30a max battery in current config.


Think i have everything fitting just under the canopy.

 

[Mid7night]

That thing is a friggin Albatross! Bigger even! Can't wait to see it fly.

 

[thenated0g]

 

[thenated0g]

Forgot to put orientation marks on the bottom so doing some masking: