Henry Spencer wrote:
> In any case, the point may be moot. Bear in mind that if your heatshield
> swap operation takes four guys for fifteen minutes -- which seems
> plausible as a first guess, given a vehicle big enough to need power
> handling of the heatshield plate -- that's one of your four allowable
> man-hours gone already, which is a lot to spend on this.
To get to 4 man-hrs turnaround you can't be swapping heatshields (or
any other major component). At 40 man-hrs your turn might be able to
hand that if it's designed for quick release/replacement (original
Alpha was) but it was a stop-gap design to get the vehicle flying.
There are much better TPSs that don't require changing that are
preferable. It's not worth all this discussion. Really.
> Things like swappable ablative heatshields, which may be perfectly
> reasonable at forty man-hours, become a lot less appealing at four. When
> the man-hour budget is that small, the mere fact that a design approach
> requires an operation to be done on the vehicle as part of turnaround --
> no matter how simple and straightforward that operation is -- becomes a
> big black mark against that approach.
Exactly. I wouldn't do it that way now.
Michael
----------------------------------------------------------------------
Michael Wallis KF6SPF (408) 396-9037 [EMAIL PROTECTED]
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