The most usual method of arriving at the maximum amount of spindling or hollowing out permissible in the case of any particular spar section is by trial and error, a process which is apt to become laborious in the absence of good guessing - or luck. The following tables have been got out with the object of making it possible to arrive with certainty at a suitable section at the first attempt.
Spindled and hollow spars
1926-10-01
Miscellaneous
No indication
English
Engineering Index Backfile | 1926
|TIBKAT | 1928
|NTRS | 1928
|Engineering Index Backfile | 1926
|Engineering Index Backfile | 1952