Dans 300mm bodge-copter (revised to 326mm)

[Stambo]

Nice. That would be around the 450 mm mark then Stambo?

I'll have a look at sketchup tomorrow looks an interesting piece of software

Yeah that was the starting point, I intend to shrink it as much as I can until 9" props only just fit.
I have plenty of wood so there may be a few revisions.

Sketchup has a bit of a learning curve but it's free and there is online tutorials.

[danhampson]

I've pulled the trigger on the carbon fiber sheet for the top and bottom plates. I've gone with some very sexy 2.5 mm matt 3k carbon sheet to match the matt 3k carbon tube.
I thought 3mm sheet would be extreme overkill and that 2.5mm would defiantly have the rigidity and durability that I'm looking for.

I'm hoping that the tubes with 2 mm walls and 2.5mm sheet combined with the alloy tube clamps give the airframe zero flex.

Thoughts/concerns all ways welcome.

[Derek]

lol....awesome!!!

[danhampson]

after a lot of trawling the net i found dimensions for the tube clamps and motor mounts.

Ive had my crayons out this morning and done the first scale drawing, ive made a few revisions to the dimensions which stand it at a 326mm and able to use 6" or 7" props

20150425_152007.jpg (2.44 MiB) Viewed 2340 times

The footprint for the bottom plate is 60mm x 240mm which will give more than enough room for the electronics and fpv gear.

another 2 drawings to go.

[KevG]

Nice Dan,

My next project starts next week!

[Derek]

Maybe come down for the fpv maiden Tony.

I've was sorting through my batteries earlier and found a couple of 2250 35c 6s packs, hmmm.

And looking at the drawings I may be able to squeeze 8" props on.

Haha ha, this project is turning into something insane

Holy crap!!! 6S with 8" props?????? WOW!!! lmao

[danhampson]

Holy crap!!! 6S with 8" props?????? WOW!!! lmao

ive limited the frame to 7" props derek, i am thinking of motors in the region of 1000kv on 6s (if i can find some)


heres the second drawing you get a better idea of the size of it

20150425_191723.jpg (2.61 MiB) Viewed 2328 times

[Derek]

HA HA HA!!! That's just too cool!!! Even 7" props on 6S is gonna be an amazing ride! I really enjoy seeing pictures like this because it lets me know that there are other scratch builders around. I think you are gonna have some fun with this project, Dan! I wish ya the best of luck!

[danhampson]

Thanks derek, I want to show people the thought process, this is a true scratch build rather than from plans.
My thinking with 6s is zero bog rather than unusable power. I've found some sunnysky's around 1250 kv (i havent got the specs to hand) that would be sweet on 5s and 6s, if they don't fry lol.

[Graham Lawrie]

Great thread Dan:)

[Tony]

Why don't you just stick some gobby 700 motors on Dan....lmao

[danhampson]

funny you should say that, not goblin motors. what about 3d fixed wing motors they will fit the mounts and generate enough thrust to compensate for there weight.

maybe something like this http://www.hobbyking.co.uk/hobbyking/st ... duct=25078

by my guestimation 4s with 7045's would give at least a 1kg of thrust.

[danhampson]

per motor that is.

[Tony]

Haha, holy smoke man.... What you going to be carrying.... Reminds me of an advert on TV where they use drones as delivery vehicles.. So what you going to use to stop it freezing when you hit the stratosphere...lmao

[danhampson]

Haha, holy smoke man.... What you going to be carrying.... Reminds me of an advert on TV where they use drones as delivery vehicles.. So what you going to use to stop it freezing when you hit the stratosphere...lmao

massive packs.

Heres the last drawing of the set.

20150426_101129.jpg (2.69 MiB) Viewed 2297 times

[danhampson]

Ive made a mock up of the arms and base plate.

20150426_172659.jpg (6.1 MiB) Viewed 2289 times

then i made ssome 7" disc's and put them in place, bodge-copter vs porket.

20150426_171843.jpg (3.54 MiB) Viewed 2289 times

[DamhDearg]

Such a cool project! It looks like you can still scratch build a quad to your specs and preferences to less than or close to a high end frame. You can always find something you don't like with the expensive frames.

[Derek]

That really looks good, Dan! I like the mock up. Nice job!

[danhampson]

Ive been taking a serious look at the electronics setup for this project and come up with this please share your thoughts.


4s >35c TBC.mah



Name: SUNNYSKY X2208-13 1500KV Brushless Motor
Model: X2208-13
KV (rpm/v): 1500
Stator diameter: 22mm
Stator Thickness: 8mm
Shaft Diameter: 3.175mm
Motor size(mm): 27.5 * 25
No.of cells(Lipo): 2-4s
Maximum Continuous Current: 16A/30s
Maximum Continuous Power: 240W
No load current / 10V: 0.7A
Motor weight: 50g

Turnigy Multistar 20A V2 Slim BLHeli 13.1
Specs:
Constant Current: 20A
Input Voltage: 2-6 cell Lipoly
BEC: Yes (linear) [Remove middle wire to disable]
BEC Output: 5V/3A
PWM: 8 KHz
Max RPM: 240,000rpm for 2 Pole Brushless Motor
PCB Size: 62mm x 13mm
Discharge Plugs: Male 3mm Bullet Connector
Motor Plugs: Female 3mm Bullet Connector
Weight: 20.3g

Flip32 (naze32) Cleanflight (oneshot enabled)

HQ 7x4.5 or HQ 7x4 props, i'll be trying both

[Derek]

They look like beefy motors! I was looking at some SunnySky 1450kv motors, so it would seem that we're both thinking alike, lol.