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JerryHey
Joined: 05 May 2007
Posts: 30
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 Posted: Tue Aug 21, 2007 11:18 am Post subject: 701 landing issues |
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I am on schedule with setting up the shop and ordering materials to
begin scratch building a 701 first week of September. In the
meantime I have read and heard about handling problems at low
approach speeds. The announcement yesterday from Stol Speed re
putting VGs on the elevator (together with removing the slats and
VGs on the wing) achieving excellent results brought the issue up
again. I am tempted to order the VGs today. Here is the question--
how do you all feel about eliminating the slats and adding the VGs.
Thanks, Jerry
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challgren(at)mac.com
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| Posted: Tue Aug 21, 2007 7:38 pm Post subject: 701 landing issues |
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On Aug 21, 2007, at 1:18 PM, Jerry Hey wrote:
| Quote: | . Here is the question--how do you all feel about eliminating the
slats and adding the VGs. Thanks, Jerry
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My 701 will have the VG's and no slats. Cruise speed will increase,
fuel burn will be lower and landing the same. VG's worked great on
our 601 HDS and expect the same with the 701.
Stan
N701VG (Reserved)
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jetboy
Joined: 22 Jul 2006
Posts: 233
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| Posted: Wed Aug 22, 2007 1:07 am Post subject: Re: 701 landing issues |
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Jerry 701s have been flying for over 20 years and I've never heard of one that was constructed within the design parameters, that had any of the "handling problems" you speak of.
The local Savanah here has had the front of the wing cut off and put the new leading edge and VG kit on. They report it goes a lot faster - but if you are building a 701 that aspect will not be your primary goal?
I guess with the 701 its easy to try both ways and cut the slat brackets off later if thats what you like, as some have done, in the experimental category.
Ralph
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Ralph - CH701 / 2200a |
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amyvega2005(at)earthlink.
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| Posted: Wed Aug 22, 2007 5:09 am Post subject: 701 landing issues |
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as we discussed 7 months ago. VGs and slats do 2 separate things, Slats allow for an AOA of 15% or greater in pitch, VGs perform their task at less than 15% AOA on pitch up. the wing with VGs will stall at a lower speed at 15% AOA and under. The slat does its majic when you crank the stick back early to get into G.eFFCT. for early take off. Crank too hard with a VG only and you will, not might, but will stall. All rules are different for planes that fly faster than 200 knts and higher than 18,000.
You will get verbal diahria from many of us on this subject, the above is the black and white basic version. best just to read up on it.
--
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JerryHey
Joined: 05 May 2007
Posts: 30
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| Posted: Wed Aug 22, 2007 5:26 am Post subject: 701 landing issues |
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Thanks, I have searched archives with no luck. I know the thread
exists but so far I have not found the right search words. Jerry
On Aug 22, 2007, at 9:08 AM, Juan Vega wrote:
[quote]
<amyvega2005(at)earthlink.net>
as we discussed 7 months ago. VGs and slats do 2 separate things,
Slats allow for an AOA of 15% or greater in pitch, VGs perform
their task at less than 15% AOA on pitch up. the wing with VGs
will stall at a lower speed at 15% AOA and under. The slat does
its majic when you crank the stick back early to get into G.eFFCT.
for early take off. Crank too hard with a VG only and you will,
not might, but will stall. All rules are different for planes that
fly faster than 200 knts and higher than 18,000.
You will get verbal diahria from many of us on this subject, the
above is the black and white basic version. best just to read up
on it.
--
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321PT
Joined: 23 May 2006
Posts: 40
Location: Texas
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| Posted: Wed Aug 22, 2007 6:03 am Post subject: 701 landing issues |
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FYI: I have no landing "problems" at any speed, no VGs and I have slats (150 hrs). Does any plane handle differently at different speeds? Yes. It is NOT a Cessna, NOT a Piper, NOT a Zenith 601, it is a Zenith 701. If you change what a Zenith 701 is, it is something different. For better or worse? Everyone will have a different opinion. I'm still learning to fly my Zenith 701 and love it. No plans to "improve" anything.
321PT
[quote][b]
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