Bug 174 on 12lbs boost. Review please.

[camber]

Originally Posted by 41Sqn_Banks

The "gate control" set a fixed throttle valve position. Indeed this was not adjusted by decreasing atmospheric pressure and thus would fall off with altitude as you describe.

The "boost control cut-out" did not set a fixed throttle valve position. The position was directly controlled by the pilot but limited the opening of the valve that +12 boost was not exceeded. Thus when the throttle was fully forward (not in the gate position) the opening would increase with decreasing atmospheric pressure until it is fully open (at FTH).

This is explained here: http://www.enginehistory.org/Piston/...erlinABC.shtml

Exactly correct as I understand it from data posted in previous thread:

http://forum.1cpublishing.eu/showthread.php?t=29031

One thing about the Spit II throttle quadrant diagram posted by Banks in this thread is that it does not include the cable attached to the red tab going to the boost control cutout, without the cable it is easier to confuse it for some type of physical barrier (as the CloD devs did).

The Spit II is rather confusing with two separate systems (gate take off boost and boost override), especially as they give approx the same boost (+12psi) in quite different ways, from controls (throttle gate; red tab) that are about an inch away from each other. I think CloD should probably not model the take off boost system anyway, it is not really relevant for combat.

It also creates confusion that +9psi is the normal full throttle boost for the II (as +6 1/4 psi is for the Spit I), and does not require the boost override (which gives +12psi). CloD gets this rather wrong by modelling Spit II boost behaviour like a +6 1/4 psi Spit I with +9psi instead of +12 psi after boost override. On the bright side, the (post patch) Spit II sea level speed at +9psi is about right (even though the boost is acheived incorrectly), and the 109s are (unhistorically) slow enough to compensate for the lack of +12psi and give a most fun 109/Spit II matchup (at around 30kmh too slow for both ).

camber