As usual, we ate our sandwich before
starting work.
We started the night with Greg touching up
the paint on the inside of the fuse while Rick and I started on the bomb bay
doors. Greg was on one table while we were on the other table. Greg didn’t
paint too long as the room just is not large enough for the two large
projects at the same time.
Anyhow, we are all three working on the
doors. First decision of the night was to use ball joint at the door end
and a simple L bend at the servo. The second decision was to use two of
the HS 81 servos we already had, for the doors. These were bought years ago
for the throttle but experience gained since then, shows us we want better
servos for the throttles.
It seemed natural to mount the ball joint
on the door where we did and servo where we did. We had that nice warm
feeling and were happy. Then someone grabbed the doors while in the open
position. They moved quite a large distance without the servo moving, what
the heck? We had failed basic machines 101 sub titled “the lever”. The
ball joint attachment is almost in direct line with the hinges, there fore
improper mechanical advantage and the door can move as the wind dictates.
After figuring out what we did wrong and
getting a solution in our heads, we called it yet another week. See ya
next time!
GRG Associates (Gary & Crew) |