I'm getting close to this stage and have pre-drilled the holes except for
the verticals in the top legs. I am planning to drill these undersize (1/16
or so) and use a heated needle pushed up through the hole in the leg and
through the tunnel top to make a pilot hole.
I have followed a tip from John Baker (a local licensed aircraft engineer
who finished his very nice Classic VH-BKR a couple of years ago) which was
to Redux a short length of solid aluminium rod inside the legs to prevent
any tendency to distort when the bolts are tightened.
Regards,
Nick Hammond
XS Monowheel 418
-----Original Message-----
Subject: Technique for locating Mono Landing Gear mounting
frame
I have cut away the firewall and underbelly, and have drilled the lower
locating holes to allow insertion of the mono landing gear frame into the
tunnel at the top, and into the cockpit alongside the tunnel at the bottom.
The question is - does anyone have a good way of locating the bolt holes in
the frame/tunnel so that they are on the centerline of the tubes, and
accurately positioned in the tunnel walls?
Because of the intersecting angles of the weldment at the top (inside the
tunnel), pre-drilling the holes in the locations specified on the frame
makes it difficult to transfer the hole location to the tunnel. On the
other hand, 'Eyeballing' the location by drilling through the tunnel first
to mark the weldment won't assure being on center or straight through.
On the top legs of the frame I am thinking of repositioning the holes so
that the verticle holes are aft, and the horizontal holes are forward. This
would allow more room between the frame members to transfer punch(mark) the
underside of the tunnel top, for drilling the hole up from the inside.
Any collective wisdom on this?
Cleve Lee
A198 MonoXS
Detroit, MI
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