REFLECTOR: Second flight

[John Dibble]

Geoff,

Awesome video.  Watching it reminded me of when my IVO pitch adjustment 
quit working and I manually set it to give 2000 rpm static which was 
just enough to get in the air, but gave me a reasonable 164 kn cruise.  
I have taken off this way from a 2400' runway (no obstacles) with no 
problem.  Of course I like it much better when the pitch adjustment is 
working.  Retracting the gear makes a big difference on climb out.  What 
camera are you using?  Can you see the video while flying?

John

On 8/20/2012 8:47 AM, Geoff Gerhardt wrote:
> 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 
> <mailto: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>
>     <mailto:geoff.gerhardt at gmail.com>
>     To: Velocity Aircraft Owners and Builders list
>     <reflector at tvbf.org> <mailto: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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>     Eckhart Tolle
>
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>
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