|
Vyse?
No time in any light twins and now have the chance to fly in a Baron.
What is the deal with blueline? What is the approach speed for a short field landing? Have always used 1.3 VSO for normal, 1.2 VSO for Assaults in the C130. I figured you guys will have the gouge. |
The 5 degrees of bank chosen for the Vmc demonstration is entirely arbitrary, and has nothing to do with achieving maximum performance at the higher single engine best rate of climb speed, known as Vyse, which is painted on the ASI as a blue line. Google Search: twin engine aircraft blue line For "What is the approach speed for a short field landing? Have always used 1.3 VSO for normal, 1.2 VSO for Assaults in the C130." A quick check of the POH when you jump in, beginning of sections 2, 3, 4 should have most of your V-speeds. For Vso likely page 4-4 to 4-8, enjoy :) |
Originally Posted by Barnstormer
(Post 656369)
No time in any light twins and now have the chance to fly in a Baron.
What is the deal with blueline? What is the approach speed for a short field landing? Have always used 1.3 VSO for normal, 1.2 VSO for Assaults in the C130. I figured you guys will have the gouge. Its really the speed you pitch for if you loose your engine to achive best performance (climb) or if you are above your S.E service ceiling it will give you the lowest sink rate. Its also the target speed for short final with one engine inop. In twins you should not fly slower than blue line if you engine's gone. Never flown a baron so i dont have the specific speeds. check the poh, if you dont have one than i would recommend about 5 knots below blue line. |
Originally Posted by propjunkie
(Post 656458)
Blue line (VYSE) is the "best rate of climb with critical engine inop"
Its really the speed you pitch for if you loose your engine to achive best performance (climb) or if you are above your S.E service ceiling it will give you the lowest sink rate. Its also the target speed for short final with one engine inop. In twins you should not fly slower than blue line if you engine's gone. Never flown a baron so i dont have the specific speeds. check the poh, if you dont have one than i would recommend about 5 knots below blue line. Did you mean 5 kts ABOVE blue line? USMCFLYR |
Flying below Vyse isn't going to kill you if an engine is inop, but it's recommended because you'll get the best rate of climb(or slowest descent at altitude) in that event. But even then, short final, when you're commiting to land, so slipping below Vyse in my opinion is how it's supposed to be in light to medium twin aircraft. I include King-Airs in this category, and the POH even has the threshold numbers to back that up.
|
don't have numbers in front of me but is Vyse the same as best glide.
|
Originally Posted by mmaviator
(Post 656601)
don't have numbers in front of me but is Vyse the same as best glide.
Best glide is the aircrafts minimum drag speed, also found where the tangent line meets the power required curve. Source 1: http://www.mathworks.ch/products/dem..._thumbnail.png You can see the minimum drag, pointed out here as Vbg or http://www.mountainflying.com/Pages/...drag_curve.jpg pointed out as min drag or L/D max which all are the same thing, best glide. Source 2: http://www.auf.asn.au/groundschool/powercurve3.gif Pink line shows the tangent line. Vyse is the speed where there is the greatest gap between power available and power required on in an OEI PaPr curve. Basically, the speed where you have the most excess power when one engine is INOP. I looked for a Pa Pr curve OEI to show you, but was unable to locate one, sorry. |
Thanks for the good info.
|
Originally Posted by mmaviator
(Post 656601)
don't have numbers in front of me but is Vyse the same as best glide.
Joe |
Originally Posted by shdw
(Post 656656)
There is likely no published best glide speed, at least there generally isn't for light twin aircraft. Vyse = Best Rate of Climb Single Engine. It would have the same relationship as best glide in that it will get you the furthest distance on one engine, but it is not aerodynamically related to best glide.
Best glide is the aircrafts minimum drag speed, also found where the tangent line meets the power required curve. Source 1: http://www.mathworks.ch/products/dem..._thumbnail.png You can see the minimum drag, pointed out here as Vbg or http://www.mountainflying.com/Pages/...drag_curve.jpg pointed out as min drag or L/D max which all are the same thing, best glide. Source 2: http://www.auf.asn.au/groundschool/powercurve3.gif Pink line shows the tangent line. Vyse is the speed where there is the greatest gap between power available and power required on in an OEI PaPr curve. Basically, the speed where you have the most excess power when one engine is INOP. I looked for a Pa Pr curve OEI to show you, but was unable to locate one, sorry. thanks............ |
| All times are GMT -8. The time now is 01:02 AM. |
Website Copyright © 2026 MH Sub I, LLC dba Internet Brands