Typical pitch trim settings for Cherokee 180

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Typical pitch trim settings for Cherokee 180

Postby snippyfsxer » Fri May 14, 2010 12:27 am

I'm curious what some typical trim settings would be for a Cherokee 180, with two people up front.  The Carenado Cherokee requires about 50% up trim for takeoff, 0 trim for cruise, and about 90% trim up for landing at 80mph (69 knots), full flaps.

In the real plane, are those figures realistic?
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Re: Typical pitch trim settings for Cherokee 180

Postby RitterKreuz » Fri May 14, 2010 4:37 am

In the real plane, are those figures realistic?


not even remotely
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Re: Typical pitch trim settings for Cherokee 180

Postby Brett_Henderson » Fri May 14, 2010 4:57 am

The (real) PA28 is a little nose-heavy.. especially when flown by a sole occupant... but nothing requring that amount of trim.
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Re: Typical pitch trim settings for Cherokee 180

Postby snippyfsxer » Fri May 14, 2010 6:16 am

The (real) PA28 is a little nose-heavy.. especially when flown by a sole occupant... but nothing requring that amount of trim.


Looks like I discovered the fine art of FDE fiddling just in time then! :)   Any ballpark figures on what ranges one might encounter in the real thing?
Last edited by snippyfsxer on Fri May 14, 2010 6:21 am, edited 1 time in total.
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Re: Typical pitch trim settings for Cherokee 180

Postby Brett_Henderson » Fri May 14, 2010 7:30 am

Unless it's a Cherokee with which I'm intimately familiar.. I'll set the trim neutral, no matter the load.. and then start my trim-groping while climbing.

Again.. if you're the sole occupant, and try to fly a text-book approach, you'll have a good amount of trim at first.. but it will be nearer to neutral, as you deploy flaps.. and is never a significant amount.

The problem with MSFS trim, is that it's not trim.. It's more like a range selection. Let's say that an elevator has a 30-degree range (15-up, 15-down). Proper trim would allow you set the elevator somewhere in that range so that it will stay there, hands-off. MSFS trim just moves the range. Like.. nose-up trim would just make the elevator range change,,
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Re: Typical pitch trim settings for Cherokee 180

Postby olderndirt » Fri May 14, 2010 8:14 am

[quote]Unless it's a Cherokee with which I'm intimately familiar.. I'll set the trim neutral, no matter the load.. and then start my trim-groping while climbing.

Again.. if you're the sole occupant, and try to fly a text-book approach, you'll have a good amount of trim at first.. but it will be nearer to neutral, as you deploy flaps.. and is never a significant amount.

The problem with MSFS trim, is that it's not trim.. It's more like a range selection. Let's say that an elevator has a 30-degree range (15-up, 15-down). Proper trim would allow you set the elevator somewhere in that range so that it will stay there, hands-off. MSFS trim just moves the range. Like.. nose-up trim would just make the elevator range change,,
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Re: Typical pitch trim settings for Cherokee 180

Postby skoker » Fri May 14, 2010 7:25 pm

When I flew we set it to 20% and forgot about it. ;)
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Re: Typical pitch trim settings for Cherokee 180

Postby olderndirt » Fri May 14, 2010 8:45 pm

When I flew we set it to 20% and forgot about it. ;)
Curiosity forces me to ask - 20% of what?  :)
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Re: Typical pitch trim settings for Cherokee 180

Postby FridayChild » Tue May 18, 2010 3:41 am

The problem with MSFS trim, is that it's not trim.. It's more like a range selection. [...] Nose-down trim not only sets hands-off elevator deflection negative, it ALSO takes away some of the available up-deflection.
I'm sure you've encountered a model where rotation was near impossible until adjusting the trim "up" ?


This finally explains it for me! I knew there was something weird with the trim in FS. Thanks!  :)
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