Home ch04 ch05 ch06 ch07 ch08 ch09 ch13 ballistic hinge
Ch13 - Nose Section
|
26/02/2009 NG-30 glassed per plans. But, I
laminated 2plies UND all over the foam. Not just the 2" extension in the
center part. Not contoured yet. |
|
15"Hg of vacuum. |
|
10/03/2009 Outside
portion of NG-30 with the 1/4" plywood alum. insert.
Aluminum tab floxed after the 6plies was vacuumed. And 3 pre
laminated 15plies of glass in plans position. Note that
my NG-30 is 2" longer, one inch front and one inch aft. |
|
Nose bulkheads laminated on both sides, now is just triming work. All was made in the vacuum. You can see the 2" extension long
nose in the drawings. |
|
20/03/2009 Here a litlle
deviation from the plans. I will build my own nose gear leg of kevlar roving wraped in 3k
carbon BID. |
|
The MKNG6 and MKNG15 will be all
composite made. First I built both of carbon. |
|
21/03/2009 MKNG6, the withe filet inside the tube
is flox. What touch the carbon is
2 plies of glass BID not the steel rail. Carbon laminate begins with the stack
sequence of 90/0/30/0/-30/0/90/0. From this point, when the carbon is
flush with the rail of the tapered roller bearing the sequence is
90/0/30/-30/0. The zero is carbon roving, tigthening with pressure rolling around the tube to get
off excess epoxy and to compress the others plies. |
|
Drawing the templates, same dimensions
and locations as the plans one. But the leg is 1" longer. |
|
Foam ready to be hot wired in the width. |
|
Now the height of the
leg. |
|
Job done. |
|
After contour the
edges and smooth the leg, I aplied 4 hands of poliurethane paste and sanded the plug to good shape. |
|
23/03/2009 After 8 plies of glass the mold is
ready. I built one support of plywood, so my
mold don`t distort. |
|
Shot. |
|
MKNG15 in place and
with one support to hold the alignment. |
|
The PVC pipe will hold
the alignment of the MKNG6. |
|
New heater with one device that we use
to make eggs to become litlle chickens, sorry I
don`t know the English name, incubator |
|
27/03/2009 All process during 13:30h to 17:00h. |
|
After the
perforated film comes the caul plate and the tire
tube strips to make pressure. Vacuum of
20"Hg and 60degrees C until cured. |
|
29/03/2009 Ok, here the kevalr
leg. Not ready, there are some triming
work to do. Is very difficult to sand and trim kevlar. What I do is to sand and make the fuzzys, after with one stilleto
blade I cut off the fuzzys. |
|
Weight is 1794g. I don`t know the glass
leg weight with the MKNG6 and 15 fitted. The kevlar
roving was laminated around the two tubes of NG6 and NG15, in one continuos session. That is were
the tension forces act, in the front portion. Aft the leg, strips of
roving connect one to the other. |
|
There are
some little gaps that was filled with epoxy. But the
final product is real good. Well, kevlar is excellent in tension, and in the nose gear we
need one real good spring piece. If that fails, the nose wheel don`t hit
the prop, cause the kevlar in that thickness simple
don`t break in two parts . And I will build one good nose bumper,
just in case. |
|
24/05/2009 Back to the work. NG0, mine is NG-1.5. The leg looks real good with the 2 plies
BID 3k carbon. |
|
NG0 floxed in
place with BID tapes, always with the 0.25" recess in the foam. I used pieces of 3" plywood between
the NG30. Also the NG3 and NG4 clamped at
6.71". |
|
|
Home ch04 ch05 ch06 ch07 ch08 ch09 ch13 ballistic hinge