Author Topic: WEP and RPM's (Read 489 times)

JB73 · « **on:** August 05, 2004, 09:16:16 PM »

some LW planes (thats all i mostly fly) the WEP does not act the same

when you turn down the RPM's on the plane to conserve fuel, then need to engage you hit WEP. well some of the planes (D9 i believe and some others possibly) it does not engage and bring the RPM's up. you have to manually bring the RPMs up to full , then hit WEP.

other planes you can hit WEP and it brings the RPM's up and engages WEP.

i dont know if this is a design, or bug... thought i'd bring it to attention and find out.

JB73 · « **Reply #1 on:** August 06, 2004, 01:49:03 PM »

punt,

HiTech, this a game design, or bug?

hitech · « **Reply #2 on:** August 06, 2004, 02:59:27 PM »

What plane does hitting wep not set up for full rpm?

HiTech

JB73 · « **Reply #3 on:** August 06, 2004, 03:37:11 PM »

i will test them for sure tonight when i get home, but it has been a few for me... mostly LW planes.

give me 3 hours (ill be home and able to check then)

thanks

JB73 · « **Reply #4 on:** August 06, 2004, 07:23:09 PM »

HiTech.. here's my findings.

looking closer i am assuming it is a design feature

all planes tested (190 d, a, f; 109 g, e, f) when you set the RPM lower than the full MAN is (example 190d RPM to 1900 or 2000) it makes the MAN go down a bit without any input on the throttle itself

i assume egines would sort of do that, but not sure

anyway, if you set the d9 for example to 2000 RPM the MAN is a bit below the max. hitting the WEP button then has no effect. only when you keep the RPM's high enough for the MAN to not self adjust will WEP bring the plane to full emergency power.

does that make sence? i hate trying to type out something i can vocalize in 30 seconds LOL

hitech · « **Reply #5 on:** August 07, 2004, 10:29:06 AM »

The manifold pressure drop is suppose to happen when reducing rpm but it will depend on what alt you are at, basicly the blower can no longer produce the max pressure the eng is rated for. But hitting the wep button is suppose to automatcly set full rpm.

Ill check it out.

HiTech

Delirium · « **Reply #6 on:** August 07, 2004, 12:58:29 PM »

From what I remember the radial engined 190s wep (MW50) could engage at less than 100% manifold pressure, but you'd have to ask one of the Luftwaffe researchers we have, I'm definitely not that familiar with them.

MOSQ · « **Reply #7 on:** August 07, 2004, 01:02:08 PM »

The Mossie and Hurri II C both have the reduced RPM no WEP syndrome.

If you just slightly reduce the RPMs, even before the manifold pressure changes, WEP will not engage.

You have to remember to go back to max RPM, then hit WEP.

I don't know about other planes, these are the two I flew last night and tested in the MA.

JB73 · « **Reply #8 on:** August 07, 2004, 02:15:53 PM »

Quote

Originally posted by hitech
The manifold pressure drop is suppose to happen when reducing rpm but it will depend on what alt you are at, basicly the blower can no longer produce the max pressure the eng is rated for. But hitting the wep button is suppose to automatcly set full rpm.

Ill check it out.

HiTech

i did all the tests from A1 on baltic, going to a max of maybe 1k usually just leveld off after wheels up to test

the 109G10 i had to REALLY lower the RPM (about 1400 or lower) to make it affect the MAN. still that had the same result, if the MAN was reduced in that manner WEP did not engage

<~~> HiTech TY for looking into this~~

DoKGonZo · « **Reply #9 on:** August 08, 2004, 10:19:14 AM »

I posted a bug a couple weeks ago about the G10. Dropping RPM's doesn't affect fuel efficiency until you get below like 1000 rpm I think. So there may be a couple things going on.