In the fuel crisis of the mid 1970s airlines were scrambling for max fuel efficiency from the old legacy jets... such as 707s, 727s, 737-200s, etc... so the call went out.. find ways to conserve fuel!
Example: Taxi with [1, twin] or [2 of four] engine where possible. Spool-up/check/rev-up the...
MAYBE MIL-STD-1 [and thru MIL-STD-24] might help interpretation... The MIL and the drawing are about the same era.
also NAS30 and NAS31 [surface roughness C/Os might help.
What company's name is on the drawing?
The UK has a few alloy s in common usage that are virtually unknown in the USA... and might have to be specially imported, such as Alloys 6063 [and now] 6082...
Hope this make sense...
I am not 'dialed into all the analysis/testing', etc for eVTOL.. but here are a few thots to chew over... especially for human flight... and e-power-train issues... that don't seemed to have any 'honorable mention'...
Every prop, gear box and motor and their use in...
LD, SW... I mostly agree... although I used the term 'insurance-cut' exclusively related to damage repair of adhesive-bonded-metal or all-composite or aluminum/composite sandwich [core] bonded structure.
Outline the damage, as detected by ultra-sonic... or tap-test... etc... THEN extend the...
Hmmm... I wonder exactly/roughly-what parts appear to be affected?
PS: Sometimes, when production is interrupted by natural disasters, parts problems, holidays, strikes, etc... re-start is a painful process.
One particularly memorable event for me was a tornado-outbreak that forced evacuation...
Thank You Sue. We feel Your loss.
Now cracks a noble heart. Good-night, sweet prince; and flights of angels sing thee to thy rest.” –William Shakespeare
As I understood it long ago and far away, EACH drawing sheet has its own revision letter... but Sheet 1 was always the lead-sheet for revisions... and has the highest Rev letter.
The first sheet could be Rev X but that Rev incremented when any of the subsequent sheets were changed or added...
Spaceflight is hard... it would be crazier-dangerous-hard... without a continuously trained, corps of space-hardened astronauts... 'at home' in long duration spaceflight including EVAs, working experiments, testing hardware, encountering new/unique demands, honing leadership and teams-skills and...
