Re: Sink Rate Estimates?

Martin Skiby


It’s a little like a man hole cover!   Haha.  Sorry I don’t have that info but it should be available or you can test it and provide for the group.



On Jun 30, 2022, at 5:04 AM, Corbin via <c_geiser@...> wrote:

Agreed, but as mentioned below this is just to complete the setup of my avionics to ensure all is working.  I just figured I would at least try and get close to we can test in flight but then back on the ground I would input my actual rate.


On Jun 30, 2022, at 7:02 AM, Mike Dwyer <q200pilot@...> wrote:

Hey Corbin.  You really need to do your own numbers.  The sink is way higher with the engine off vs at idle.  I'd suggest pulling the mixture to kill the engine.  At idle, I found my best glide to be 120 mph.  At 85 the sink rate was huge.  So find your best glide by trying 120, 110, 100, and 90 mph.  You could probably do this in one flight.  Go to 4000'. Kill the engine at 120, record your velocity down, then slow to 100, ...  The engine/prop won't stop until you get below about 80 mph.
Fly Safe 
Mike Dwyer

On Thu, Jun 30, 2022, 07:11 Corbin via <> wrote:
Hey all,

I’m curious what’s out there for approximate sink rate at 90mph.  I know there’s many factors/variables so let’s go with the setup below and add as necessary.  

I’ll need to go fly and try to obtain my actual sink rate but this approximate need is to complete the setup of my avionics (smart glide).

  • Single occupant
  • 950 lbs gross
  • 90 mpg
  • Reflexor set to cruise 
  • Q200 w/ GU & VG’s
  • DA of 3,000ft
Got the placards on last night!

- Corbin






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