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Forum: Tech Log

28th Jan 2018, 14:00

Replies: 35

V1

Views: 8,249

Posted By galaxy flyer

V1 is not refusal speed, aka accelerate-stop, the...

V1 is not refusal speed, aka accelerate-stop, the first action of stopping is to be actioned at V1. The USAF always calculates refusal speed and a V1, which is handled the same way as civilians do. ...

Forum: Tech Log

26th Jan 2018, 22:40

Replies: 35

V1

Views: 8,249

Posted By galaxy flyer

Zhukovsky, perhaps? But, agree the Global is...

Zhukovsky, perhaps? But, agree the Global is great!

Forum: Tech Log

26th Jan 2018, 22:24

Replies: 35

V1

Views: 8,249

Posted By galaxy flyer

If it matters, the contaminated correction was...

If it matters, the contaminated correction was applied before the crosswind. No doubt, it’s specific to the Lockheed certification and test. It was flight test data. The only question I had and...

Forum: Tech Log

26th Jan 2018, 21:50

Replies: 35

V1

Views: 8,249

Posted By galaxy flyer

JT, You got me doubting my fading (only a...

JT,

You got me doubting my fading (only a tiny bit) memory, so I dusted off the C-5 performance manual which is where I remembered Vmcg being corrected for contamination as well as crosswind. ...

Forum: Tech Log

26th Jan 2018, 20:23

Replies: 35

V1

Views: 8,249

Posted By galaxy flyer

Sky job, I’d be careful about unduly...

Sky job,

I’d be careful about unduly limiting V1 on non-dry runways. While reducing V1 does half reduce the AD; one should account for the increased time on those non-dry surfaces controlling the...

Forum: Tech Log

26th Jan 2018, 13:46

Replies: 35

V1

Views: 8,249

Posted By galaxy flyer

Interesting that GLF provides for a variable V1. ...

Interesting that GLF provides for a variable V1.

JT With a Vmcg of 86 knots, which was well below the V1 at an absolute minimum useable take-off weight and huge stopping power, ASD perf was great....

Forum: Tech Log

26th Jan 2018, 00:22

Replies: 35

V1

Views: 8,249

Posted By galaxy flyer

Agreed, JT, but in the simplified performance...

Agreed, JT, but in the simplified performance world of biz aviation; they just show BFL in tabular data. To increase the V1 to equal Vr would unbalance the distances. I’m not sure how they selected...

Forum: Tech Log

25th Jan 2018, 16:08

Replies: 35

V1

Views: 8,249

Posted By galaxy flyer

A lot of muddying here. If the original poster...

A lot of muddying here. If the original poster is who I think; my post stands. Corporate planes rarely optimize the runway performance like airlines. They just assume it’s a balanced field and...

Forum: Tech Log

25th Jan 2018, 14:50

Replies: 35

V1

Views: 8,249

Posted By galaxy flyer

If you are on the Global, the type-specific...

If you are on the Global, the type-specific answer is V1 = Vr on dry runways 99.9% of the time. I’ve never seen an exception, but there might be IF you are using an optimized runway analysis where...

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