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Inverted turns
05-11-2014, 11:55 PM
Post: #1
Inverted turns
Just trying to make sure I understand these correctly.

I am in an inverted bank angle (other than 180i) AND do any form of pull transition.

My speed only allows say a 2G turn rate.

If I pull a 2G turn I can choose to (or must I?) actually use the 3G turn requirements in terms of number of FPs to be expended before the facing change?

And I only pay the 2G turn drag cost?

Is that correct?

I assume that if I am in an inverted bank and do a 2G turn WITHOUT also making a pull transition that I must meet the normal FP requirements before changing facing?

Many thanks

Andy

PS I think I picked up a couple of typos/inaccuracies in the training book and will post them up later.
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05-12-2014, 10:46 AM
Post: #2
RE: Inverted turns
Hi Andy,

You are correct, must be inverted and pulling to get the +1G from gravity and the aircraft incurs drag at the G used. In you example it would be 2G drag and 3G facing requirement. You can choose to use only 2G and not use the help from gravity. That would be similar to extending a facing change.

Aircraft in level or climbing do not meet this requirement and do not get the G from gravity.

Thanks for the help with the typos Smile

Cheers,

Steve
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05-14-2014, 01:58 AM
Post: #3
RE: Inverted turns
No Problem Steve :-)

One other question related to inverted turns if I may.

Say I am in a L120i bank at 45C.

I use a 1G Pull to bring my nose down to 0-LvL.

I have enough speed and my bank angle allows me to pull a 4G turn.

This means I can actually use the 5G turn rate.

However my aircraft Stress Limit is 4G.

Do I have to roll for Overstress? Or does the turn still count as 4G for Overstress purposes?

Regards

Andy
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05-14-2014, 07:35 AM
Post: #4
RE: Inverted turns
Hi Andy,

Which rules are you using? I may not fully understand the questions, so here goes Smile

Using the basic rules the allowable G is listed on the Banking table, Turn-Transitions Tables page. 120i allows 5/3G.

Using the Angle of Bank Effect on Applied G a 120i bank at 4G allows 3/4H-2V and at 5G allows 4H-3V.

The ASL (aircraft stress limit) is 4G and you pull 5G will require an Overstress. Pulling 4G with a start speed that allows 5G will not incur a stress check, only when the ASL is exceeded. You would need to pull 5G.

Hope this helps, if not let me know Wink

Cheers,

Steve
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05-14-2014, 07:52 AM (This post was last modified: 05-14-2014 07:53 AM by Ologotai.)
Post: #5
RE: Inverted turns
Hi Steve

I'm just using the basic rules - so no "Angle of Bank Effect on Applied G" rule in play.

I am in L120i, 45C and do a simple +1G pull to move my nose 3 arcs to 0-LvL.

I am at a speed that allows me to do a 4G turn (but not 5G) plus a bank angle of 120i allows me to perform up to a 5G turn.

Can I make a 4G "Turning whilst Inverted" turn using the 5G rate?

If so do - I count as pulling a 5G turn for the purposes of ASL?

Cheers

Andy
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05-14-2014, 08:12 AM
Post: #6
RE: Inverted turns
Hi Andy,

Now I see it Wink You may use the 5G facing requirement while applying 4G. No overstress check required, the additional G from gravity will not increase the load on the airframe.

Cheers,

Steve
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05-14-2014, 09:03 AM
Post: #7
RE: Inverted turns
Thanks Steve.

Sometimes trying to articulate and answer a question using the written word is harder than the question itself :-)
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05-17-2014, 05:14 AM
Post: #8
RE: Inverted turns
Steve

If I then fire (or am fired at) do I count as having used 4G or 5G?

Cheers

Andy
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05-17-2014, 10:09 AM
Post: #9
RE: Inverted turns
Hi Andy,

The applied G of 4G would be used, the effective G is 5G.

Cheers,

Steve
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