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1. 08:47 AM - 701 Flap Angle choices (Keystone Engineering LLC)
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| Subject: | 701 Flap Angle choices |
John
When I was rotating at 20 mph the plane was at empty weight plus me and 10
gallons of fuel. I could force the nose down then it would spring back up.
Like they say on TV don't try this at home. Or at least go practice with
1/2 flaps then 3/4 flaps then with full flaps on a calm day in the middle of
a big runway.
The Heintz brother is correct at normal operating weights unless you have a
real rearward CG you cannot lift the nose before 40 mph. I have only
experienced the nose coming up easily once. I was heavy and rearward on my
CG. The nose came up very easily at very low speeds. I held the nose off
but kept the plane on until I had more than normal flying speed. In my
experience when you are exploring the very edges of the weight and balance
envelope you should fly in the middle of the flight envelope.
Here is a post I did about two years ago regarding the small tail, large
tail and VGs.
>As someone who has flown the short and long elevators with and without VGs,
>I feel I may have something to add to the discussion. The plane flys fine
>with all of the versions. I found I was able to fly slower, stabilized
>approaches as the elevator became more effective. With the small tail I
>found the plane sensitive in pitch at very slow speeds which made it
>difficult to stabilize a very slow approach. I am now able to fly short
>final at 45 mph. Before I was 50 mph or so.
>Even with the large tail with VGs I still cannot raise the nose with power.
>When the nose comes up the 801 will fly. The tail is just not in the prop
>wash.
>If the original tail is rated as 100. The original tail with VGs is
>probably 125. The larger tail is probably 130. The larger tail with VGs is
>probably 140. Realize this is a subjective rating system and I cannot back
>it up with data. Well, I take that back. At the Valdez May day fly-in
>competition with the original tail I was able to take off in 130'. With
>the bigger tail with VGs I got off in 113.5'
>I still run out of trim at slow approaches speeds. I'm contemplating
>adding VG to the top to try to increase the effectiveness of the trim tab.
>One more word to the wise. Do not fly approaches with full flaps when
>there is a significant crosswind!!! Keep the flaps up and the 801 handles
>crosswinds very well.
Bill Wilcox
Valdez, AK
N801BW
405 hrs
In winter storage
Working on the engine cowl
Time: 12:05:03 PM PST US
From: "John Swartout" <jgswartout@gmail.com>
Subject: Re: Zenith701801-List: 701 Flap Angle choices
Bill,, I'm glad you mentioned you have the 10 ft tail. I was told by one of
the Heintz brothers several years ago that the 801 could not be rotated at
less than 40 mph--not a good feature when you can't do a short/rough T.O.
with a bush plane! I'm glad to hear that the bigger HT has taken care of
that.
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