berthod@relay.EU.net (Jean-Daniel Berthod) (11/15/89)
From: hslrswi!berthod@relay.EU.net (Jean-Daniel Berthod)
[This was sent to me by a subscriber of the sci.aeronautics mailing
list. Please direct any replies to him directly.]
I have seen lately some photographs of a Bell OH-58D AERO SCOUT with a
mast mounted sight device. As one drawing is worth one thousend words
(may be even 2000 words of my broken english :-)) just look at the
picture :
__
'oo` <---- part 1
`__'
|| <---- part 2
||
========================================
____||______ '\
/ \ / |
----- `--------------------------' |
/ / __________________________ |
/_____/ / \ |
/ ___/ \|
\_____________________/
| |
\____________________
I know that this device is made by McDonnell Douglas in colaboration with
Northrop and is equipping many attack or observation helicopters.
Does anyone know the mechanical aspects of it, especially :
- whether the part 2 is fixed to the main rotor hub (i.e. turning with it)
or is free mounted ?
- part 1 might be turning with the rotor and the camera would then be
to take one shot every rotation.
- how is the part 1 stabilized (gyro ?) and how many liberty degrees does
it have ?
Any other information will be welcome.