REFLECTOR: Second flight

[Geoff Gerhardt]

Scott,

My static is 2050RPM.  I don't have RPM at the other airspeeds in my head,
but I have the data log from the flights at home and can retrieve them
tonight.  I talked to Craig a few weeks ago, and he indicated a static of
2050RPM was to be expected for that prop/engine combo.  He cuts a "longer"
prop for an RG than a FG to allow for more top end with a cleaner plane.  I
haven't wound it up to go past 120kts, yet.  Now that I know it flies ok,
I'll head out this week and take it up to altitude to see how it does in
cruise.

Thanks.

Geoff

On Mon, Aug 20, 2012 at 9:25 AM, Scott Derrick <scott at tnstaafl.net> wrote:

>  Geoff,
>
>     I've tuned 3 props with Cato, IO360, TIO520 and IO520.  Never flew the
> TIO520.
>
>     Whats your RPM at static, 50KIAS, 90 KIAS, 120KIAS, 160KIAS??
>
>     The static and 50KIAS are the most important for takeoff performance.
>
> Scott
>
>
>
> -------- Original Message --------
> Subject: REFLECTOR: Second flight
> From: Geoff Gerhardt <geoff.gerhardt at gmail.com> <geoff.gerhardt at gmail.com>
> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org><reflector at tvbf.org>
> Date: 08/20/2012 05:50 AM
>
> Guys,
>
>  I spent Sunday morning fixing a few issues that were identified in the
> first flight, then took her out for a second flight this afternoon.  I
> think I'm going to have to send my prop back to Craig to have it
> re-pitched, but I'd like to hear your input.  There's a link below to a
> post on my website that shows the flight video as well as a CloudAhoy
> analysis (if you're not familiar with CloudAhoy, its a very cool app for
> recording a flight).  With just me on board and only ~20gal of fuel, I need
> ~2200' of runway to lift off (DA 2000'), then I have to stay low to build
> up some speed to start my climb.  Once I can get to 90-100kts, I can climb
> ok, but I feel a bit unsure about flying into any 3000' runways with only
> 800' of wiggle room, particularly if there's any trees past the runway.  My
> prop is currently 66x74.  Have a look at the video and CloudAloft and let
> me know how this compares to your experience with a fixed-pitch prop.
>
>  Here's a link to the post on my website that describes the second flight
> and videos.
> http://thegerhardts.com/velocity/?p=513
>
>  Geoff
>
>
>
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