Speed 400
Cloudster Project
In the previous Report No. 53, a 4-40 metal screw
was screwed in from the back side of the firewall to secure the threaded ABS
plastic tube to the front of the firewall as shown below. It is difficult to
anticipate some potential problems and a concern arose that once the
fuselage was completed there would be no way to access this screw, should
the need arise.
To resolve this problem, a 4-40 Allen head nylon
screw was screwed into the firewall end of the threaded ABS plastic tube as
tight as it would go just short of twisting it off. Then the screw was cut
off leaving a 5/16" length of nylon threads as shown on the left below.
Now the ABS plastic tube with its length of nylon
screw can be threaded into the firewall from the front as shown below thus
eliminating the requirement to access the firewall from the back side.
The picture below shows the cowl neatly attached
to the firewall with the newly revised 4-40 screw assembly. This is not only
a more user friendly design, but also eliminates the metal screw and saves a
little weight to boot................Tandy
