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High speed taxi tests: good or bad idea?

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321PT

Joined: 23 May 2006
Posts: 40
Location: Texas

Posted: Fri Oct 01, 2010 6:23 am Post subject: High speed taxi tests: good or bad idea?

I don't want to get  in the slats vs. vg's issue, but FYI, I have slats, vg's on the tail and have no problem keeping the nose off.  

 Paul

 321PT

  [quote][b]

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John Bolding

Joined: 23 May 2006
Posts: 281

Posted: Fri Oct 01, 2010 6:57 am Post subject: High speed taxi tests: good or bad idea?

Long before the VG's came into vogue I REALLY  enjoyed watching Grant Rappe taxi around the ultralight area with the nosewheel  6" off the ground. The guy UNDERSTOOD a 701.

  

 John

 [quote]   ---

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n752ms(at)softcom.net
Guest

Posted: Fri Oct 01, 2010 8:12 am Post subject: High speed taxi tests: good or bad idea?

Same setup I have Paul. I fast taxi all the way to the taxi way nose wheel off the runway all the time. In fact I could scrape the tail if I wasn't careful. 

Talking fast taxi, I would consider fast taxing to be any speed faster than you would taxi on a taxiway. 

Mark S.

701/912uls

Sent from Mark's iPhone



On Oct 1, 2010, at 7:18 AM, "Paul Tipton" <PTIPTON(at)swmail.sw.org (PTIPTON(at)swmail.sw.org)> wrote:



[quote] I don't want to get  in the slats vs. vg's issue, but FYI, I have slats, vg's on the tail and have no problem keeping the nose off.  

 Paul

 321PT

   	  Quote: 	
		  

	


[b]

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ronlee

Joined: 25 Dec 2006
Posts: 141

Posted: Sat Oct 02, 2010 2:34 pm Post subject: Re: High speed taxi tests: good or bad idea?

I guess I didn't make my message clear about taxing with the nose wheel up. As someone else noted the nose will come up VERY easily and at a low speed, if not careful one can even scrape the tail tie down. It seems at some point it (the tail) just wants to keep going down. My experience is coming down from such a nose high taxi is touchy to bring it down gently. My thoughts are that once the air starts going through the slats (nose high) the tail just wants to keep going down. Now here is my point, if you get airborne with the nose high and you don't want to fly, but bring it back down to the runway gently is where the problem can be. It's easy to come down much faster then you want and easy to thump it , especially if the end of the runway is approaching.

I've taxied both ways, slats on and slats off with VGs and can definitely state that taxing with the nose wheel an EVEN distance (6 inches,  10 inches etc) off the ground is way easier done without the slats on. I can only theorize why this is so. Maybe someone has right answer.

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Ron Lee
Tucson, Arizona

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