JK Jet Trainer From Jason

[HZM]

Hi Jason,

Thanks for the pic so far Btw, I am curious how does the vacuum helps? By removing air the the foam make it more compress and stronger?

Cant wait to see the complete project in flight

Mike

[loyn]

Mike the vacuum is to help holding the balsa tight onto the foam wing while the glue set, nothing to do with improving the strength of the wing. As it is difficult to ensure the balsa skin confirm to the wing profile.

[jason_ices]

Originally posted by HZM
Hi Jason,

Thanks for the pic so far Btw, I am curious how does the vacuum helps? By removing air the the foam make it more compress and stronger?

Cant wait to see the complete project in flight

Mike

Vacuum bagging help to hold down every single inch of the balsa sheet to the wing suface area. It's more efficient compare to weight hold down in foam bed because it generate great force to the balsa sheet.

We have to make sure wing core have the shape that we want, then apply thin coat of glue(probond) or epoxy to the sheet, take your time to align the sheet. Put the whole thing in the bag, seal the bag and on the vacuum. Make sure that is no leakage.

Wait for the glue or epoxy to cure, follow the instruction of the manufacture for the product that you're using.

Thanks for viewing.

We also "kang Chiong" to see the whole plane come out!!

Jason

[jason_ices]

17 Nov 2004

Today cut out all the ply rib. The wing rib slot was cut out by using hot wire method.

Jason

[jason_ices]

17 Nov
02

[jason_ices]

17 Nov
03

[jason_ices]

17 Nov
04

[jason_ices]

17 Nov
05

[jason_ices]

17 Nov
06

[HZM]

I really sweat for u. Cant wait to see the complete bird. Gonna be there when u maiden it

Mike

[jason_ices]

Originally posted by HZM


I really sweat for u. Cant wait to see the complete bird. Gonna be there when u maiden it

Mike

Don't Worry Mike, we'll update this thread. This is our first try on turbine .....Hopefully god bless Me I think will test fly at old place Tuas south.

Jason

[jason_ices]

Can sleep well!! my wing cutted out with-out wash-out!!
receive message from RCU member :

There is a spanish quote who says " El mal paso hay que borrarlo pronto " or in english "The wrong step should be corrected quickly" Better cut new foam panels with about 3 degrees washout, Jason... you will not regret. of course, in my humble opinion.

Best Regards, Enrique

So i decide to built another panel wing with 3 deg wash out built-in !! Then i can sleep sweet

Jason

[jason_ices]

Work on 18 Nov

today completed the wing section, we stil haven't decide on fuselage lay-out, we have 2 lay-out, which one better ??

jason

[jason_ices]

Work on 18 Nov
02

[jason_ices]

Work on 18 Nov
03