BBUM Yak 55 Back Room Maiden

Coming up is the maiden flights of my BBUM Yak 55 when youtube finishes.

BB (barnesyboy) UM (Ultra Micro) Yak 55 had its maiden in my back room tonight so i thought it rude not to share my joy lol,

Those that have been to my house know my back room isnt all that big

Thanks to Rich for the laser cutting, My wife for not killing me but actualy helping, and the boy for filming

M

get on with it then

sound that, what's the setup for us to ponder over

Its all the gear out of the Ultra Micro 4Site, 3mm depron, Badley milled out AUW 32g.

Milling was intresting, airframe was 28grm before milling after it was down at 21g, and I didnt do as much as i wanted because i got bored!

Nice one!

Was the milling all done by hand weith a dremel or something?

Andy

Yeah Routing bit in the dremel, very hard to keep the depth constant, but it gose through the depron really easy,I need one of the jig things they make would be loads easier with a constant depth.

http://www.tooled-up.com/Product.asp?PID=121529

why don't we try one in 2mm depron I have loads of it & loads of 3mm if anyone wants some

2mm would be good, get one cut *please

I would have to change the wing spar then for 2mm, Ive been using a 3mm x 0.5 carbon strip on the LE, would proberbly have to change to a 1mm cross brase, no biggi though

I've actually been wondeirng about using something like 2 or 3mm depron, but cut on the laser with all the lightening bits cutout completely. Then cover the depron with some of the thin laminating film to give you the surface back. So the Depron "frame" gives you the structure, and the laminating filmn gives you the rigidity and aerodynamic surface. Not sure if it would work out heavier or lighter than a simple chunk of foam, but I bet it would be a hell of a lot stronger, and do away with a lot of the carbon bracing that is needed....

Is this the Yak55 that I sketched? I'll have a play with the 3D model to see what the weight difference is if it is...
Andy

Yeah its the one you drew Andy, the total cut out and skin idea ive looked at but the mylar is aparently a bugger to cover and very easy to warp the depron

Also, did you ever finish the BBAirbender drawing as i cant find it this end

That's why I would try Document laminating film. It doesn't warp bits of paper

Love the colourscheme, how do you get an airbrushed finish to look like it was coloured in with felt-tip pens?

The MicroAirbender was finished yep, emailed it over on the 22nd feb this year. Will send the DXF for it again now though..

Andy

no airbrush this time buddy, cant spend 3hrs milling then add the weight back with paint TUT!

Cheers for the Airbender!

Just tried it outside, Small breeze and 30odd gram dont mix , its fine though just was horible