Speeds...

[Founder]

I'm making a list of all speeds to make it easier for me to se their place on the scale, please fill in any gaps and missing speeds...

Brake release
Vmcg
Vmca
V1
Vr
V2
V2min
V3
V (max endurance & min power)
Vmd
V (max range)
V (long range)
Vmax

[hetfield]

Some you can find here

http://www.wingfiles.com/files/perfo...eoffspeeds.PDF

[Founder]

Thanx

here is an ameded list... could anyone please check that it's correct?

Brake Release Point
- Vmcg
- V1
- Vmu (minimum unstick)
- Vr
- Vmca
- V2 take off safety speed
- V2 min
- V3
- V max endurance & min power
- V max range & min fuel-flow
- V long range
- V maximum & max drag

[hetfield]

Concerning Vmu, I don't get it........

Too old, too bold

[Mad (Flt) Scientist]

Originally Posted by Founder

Break Release Point
- Vmcg
- V1
- Vmu (minimum unstick)
- Vr
- Vmca
- V2 take off safety speed
- V2 min
- V3
- V max endurance & min power
- V max range & min fuel-flow
- V long range
- V maximum & max drag

1. It's 'brake' not 'break' - 'break' is not a word you want to see associated with an aircraft.

2. The various take-off related speeds don't have a single fixed relationship. For example:
- either of Vmca or Vmcg may be smaller
- V2min must by definition be not more than V2 (you have V2min>V2)
- V1 and Vr may be equal
- Vrmin may be set by 1.05Vmca for some cases (hence Vr>Vmca)

[Founder]

Originally Posted by Mad (Flt) Scientist

1. It's 'brake' not 'break' - 'break' is not a word you want to see associated with an aircraft.
2. The various take-off related speeds don't have a single fixed relationship. For example:
- either of Vmca or Vmcg may be smaller
- V2min must by definition be not more than V2 (you have V2min>V2)
- V1 and Vr may be equal
- Vrmin may be set by 1.05Vmca for some cases (hence Vr>Vmca)

1. sorry about that =) was typing a bit faster than I was thinking... =)

2. I see, how about the faster speeds? I've seen various definitions about speeds that occur at the same point on the scale, for example best range and max range seams to be the same speed. Max Endurance and minimum power also seams to be the same speed...?

[ABX]

Hi Founder

Shouldn't Vne be at the end of the list somewhere?

Cheers,

ABX

[Wizofoz]

....Or more probably Vmo/Mmo. Also Va is missing. Also, Vd (no joke!!) is Maximum Design Dive speed.

[Founder]

Originally Posted by Wizofoz

....Or more probably Vmo/Mmo. Also Va is missing. Also, Vd (no joke!!) is Maximum Design Dive speed.

could you copy the list an insert these speeds at their appropriate place?
I know they might not have a fixed place but with an approximation perhaps they might fit in somewhere...

[howflytrg]

How about Vmcl?

Along with Va
Vb
Vc
Vd design speeds?

[Wizofoz]

Brake release
Vmcg
Vmca
V1
Vr
V2
V2min
V3
Va
V (max endurance & min power)
Vmd
V (max range)
V (long range)
Vmo
Mmo
Vd

[Fuel Crossfeed]

A few more to throw into the equation:
Vmbe - brake energy speed
Vlof - lift off speed
V4 - steady initial climb speed
Vno - normal operating limit speed
Vat - target threshold speed

[Old Smokey]

Vfe
Vfo
Vle
Vlo
Vref
Vapp
Vs
Vs0
Vcl
Vmd
Vef
Vx
Vy
Vz (Clue - very Airbussy)

Just a few to wet your appetite.

Regards,

Old Smokey