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Chris Heintz on VGs

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kmccune

Joined: 22 Sep 2007
Posts: 577
Location: Wisconsin, USA

Posted: Wed Dec 26, 2007 4:40 am Post subject: Chris Heintz on VGs

I searched and couldn't find any reference to this article so here is the link.

It is significant that he states  "From a design standpoint, I have no objection to the removal of the leading edge slats (and their attachment brackets) and replacing them with VGs"  in the article. Now that IS out of context, but it addresses some on the objections made here regarding the removal of the slats. Anyway here is the link read away and draw your own conclusions.

http://www.zenithair.com/stolch801/design/slats-vs-vg-design.html

Kevin

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Dorothy McCune

ronlee

Joined: 25 Dec 2006
Posts: 141

Posted: Wed Dec 26, 2007 7:08 am Post subject: Re: Chris Heintz on VGs

I have taken the slats off  my 701 about 50 hours ago. I have to say that at the first take off I said to myself, I like this, my opinion is still the same. The plane seemed to climb easier and better. In flight there is no perceptible difference with or without slats including the trim setting. It is  a bit faster, not sure how much though. It isn't enough excited about. Now when it comes to landing there is no comparison, The flare is easy and smooth, I can hold the nose wheel off the ground as long as I want. With slats I had trouble letting the nose wheel down gently. If I tried to hold it off and all was not perfect the tail wanted to go down and if I eased up on the stick I may put the nose wheel down harder then I wished, even though I wanted to keep it up. I can now do what one would consider a normal flare landing much, much easier. It does does float on landing almost  like a normal plane now so I am sure I use more (very little) runway. I haven't tested the take off, but really don't believe I have lost a thing there, if any it certainly isn't detectable flying the airplane. I will say again that I like to fly the plane better without slats.

 

If one needs to use the very least space for landing, I say leave the slats on. If you want a plane that flies like I described, take them off and install VGs. If you are unhappy put the slats back on. After all, it is only about an hour job, so it isn't a major undertaking. I would venture to say few would re- install the slats.

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Ron Lee
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kmccune

Joined: 22 Sep 2007
Posts: 577
Location: Wisconsin, USA

Posted: Wed Dec 26, 2007 2:56 pm Post subject: Re: Chris Heintz on VGs

I just started building and it seems that a lot of people are very polarized on this issue. I'm not supporting them ether way, but it seems that good information is the reason for this forum. I am still making up my own mind after all.  This is a great forum and well populated with knowledgeable and good people. So I posted what I believe is pretty good info, as it is from the Zenith. Strange, how it is in the 801 section though. 

I believe that the slats are the very best way to make this plane set down in a short area. But like everything it is a compromise. The question everyone should be asking is do I NEED to land that short and am I capable of it. As long as Mr Heintz is apparently OK with it from a design standpoint, I say that everyone should make up their own mind and go with it. 

Kevin

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