Matty's Marvelous Modular Monstrosity

HomeBuiltAirplanes.com

Help Support HomeBuiltAirplanes.com:

Foundationer

Well-Known Member
Joined
Nov 29, 2016
Messages
204
Location
London
Last day of holiday and my colleagues are annoyed that I'm getting big packages delivered to work! In this case a 250m bobbin of carbon pultrision! Gonna have a bunch of stuff to get on with when I'm back!

IMG-20190725-WA0008.jpg
 

Foundationer

Well-Known Member
Joined
Nov 29, 2016
Messages
204
Location
London
10mm x 1mm

Not 100% sure how I'm going to turn them into bundles and make them into a spar yet. Glue them together then incorporate them in the spar, or do it all in one operation?
 

Foundationer

Well-Known Member
Joined
Nov 29, 2016
Messages
204
Location
London
Anyone got a ballpark minimum thickness for carbon at a trailing edge so you don't slice yourself open on it and it doesn't crumple as soon as you look at it? 1mm? I'm thinking that my 2*265gsm will be really thin.
 

Foundationer

Well-Known Member
Joined
Nov 29, 2016
Messages
204
Location
London
Today I have mostly been battling Solidworks... Black is carbon / kevlar / carbon. Red is crash reinforcement: Rollover protection set into the bulkhead behind pilot (also behind pilot: 100kg of LiPo batteries(!)) cockpit rails of uni carbon, kevlar and foam and a front bulkhead. That's about as far as I've got turning it all into 3d.

All the white stuff will be non structural turtle deck / aerodynamic fairings. And then there's that huge cockpit transparency... I really should think about how to actually make that...
 

Attachments

pictsidhe

Well-Known Member
Joined
Jul 15, 2014
Messages
7,548
Location
North Carolina
Anyone got a ballpark minimum thickness for carbon at a trailing edge so you don't slice yourself open on it and it doesn't crumple as soon as you look at it? 1mm? I'm thinking that my 2*265gsm will be really thin.
Chopping off the last 1% of airfoil is a common rule of thumb. Neglible aero impact.

I know exactly what you mean about figuring out how to make stuff. A design is no good if you can't turn it from paper into reality.
 

Foundationer

Well-Known Member
Joined
Nov 29, 2016
Messages
204
Location
London
Two elevator halves ready for whatever the next bit of the process might be. I suspect it's trimming, joining, wrapping some more bi-ax over the join area, cutting out some bits for hinges, filling, sanding, painting, mass balancing... Basically done then! 490g each which is sort of about right. Massively overbuilt and as minimal as I could make them all at once.

Flaps follow the same construction methods and are much bigger so getting it all sorted out on the elevators first seemed like a good idea.
 

Attachments

Top