Boost cutout override principle at not full open throttle?
Posted: 21 Mar 2021, 13:09
Hello,
I think, this goes directly to Killratio
I guess, with full open throttle and the supercharger and engine being able to produce more than the set maximum boost pressure, the excessive pressure is simply vented outside leaving the MAP a the maximum.
I'm wondering how the boost cut out override is functioning when not having full open throttle.
I was i nthe MkIa 2-position-airscrew at about 13.000ft and having set around 2100 rpm with -1 boost.
Flipping the boost cutout handle forward without moving the throttle lever, the MAP dropped down so did the rpm.
What's causing this? I thought the boost cut out override simply stops venting excessive pressure, but without excessive pressure, there should be nothing to vent and MAP should stay the same? I think, I'm totally wring here?
Thanks and regards
Jens
I think, this goes directly to Killratio
I guess, with full open throttle and the supercharger and engine being able to produce more than the set maximum boost pressure, the excessive pressure is simply vented outside leaving the MAP a the maximum.
I'm wondering how the boost cut out override is functioning when not having full open throttle.
I was i nthe MkIa 2-position-airscrew at about 13.000ft and having set around 2100 rpm with -1 boost.
Flipping the boost cutout handle forward without moving the throttle lever, the MAP dropped down so did the rpm.
What's causing this? I thought the boost cut out override simply stops venting excessive pressure, but without excessive pressure, there should be nothing to vent and MAP should stay the same? I think, I'm totally wring here?
Thanks and regards
Jens