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WD prop 701/912ul

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b.carl@sympatico.ca

Joined: 20 May 2008
Posts: 77

Posted: Mon Feb 02, 2009 2:17 pm Post subject: WD prop 701/912ul

I have a 70" 3 blade WD on 912ul/701. I find it's a good combination needing 

8-12' of pitch depending on desired performance. As discussed I found the 

tips were too close to the ground so I added a 4" plug between the nose fork 

and the strut. Works fine and also reduces the height of the tail to clear 

the top of doors. Real help on skis.

For info.

Carl

ricklach

Joined: 20 Jun 2006
Posts: 127
Location: Kernville, Calif.

Posted: Tue Feb 03, 2009 9:14 am Post subject: Re: WD prop 701/912ul

Hi Carl,



I’ve been thinking of adding a spacer/plug to the front strut to get more prop ground clearance as you have done. I would love to see a picture or two of yours to see how it turned out.



Thanks 



Rick

_________________
701Driver
N35 26.700, W118 16.743

challgren(at)mac.com
Guest

Posted: Tue Feb 03, 2009 9:34 am Post subject: WD prop 701/912ul

Carl:



I got a nice response from Michael Heintz yesterday about the same  

subject.  I will copy it immediately below:



"Hi Stan,



Sounds like you are getting ready for some serious fun with your CH 701!



The nose wheel fork is indeed an item manufactured on special order by  

Zenith Aircraft. When you call Zenith to discuss details, you should  

probably ask to speak with Roger who knows all about these things...



Note that the extended fork is best if you are considering a larger- 

than normal nose wheel. If you plan on using the wheel supplied in the  

kit, but need additional prop clearance, it is quite common to insert  

a spacer between the standard fork and the nose gear strut. I have  

seen these up to 1.5" tall; made of either aluminum (with lightening  

holes) or hardwood. As a general rule of thumb, we try to have at  

least 9" of clearance, a bit more if the bungee is older/looser...



Hope this helps!



Best regards,

Michael Heintz

Quality Sport Planes"



I also would like to see a picture of your spacer/plug for the front  

strut as my current prop only allows about 8" of ground clearance.



Stan

701/3300

On Feb 3, 2009, at 10:14 , ricklach wrote:



 	  Quote: 	
		   

 <rick(at)ravengear.us>



 Hi Carl,



 I’ve been thinking of adding a spacer/plug to the front strut to  

 get more prop ground clearance as you have done. I would love to see  

 a picture or two of yours to see how it turned out.



 Thanks



 Rick



 --------

 Rick

 N35 26.700,  W118 16.743

cffd(at)pgrb.com
Guest

Posted: Wed Feb 04, 2009 9:32 am Post subject: WD prop 701/912ul

Rick,

  

 In 1998 when I built my hanger, I used old tail  height figures from Zenith.  Turned out the rudder would hit the roof  joist.  I called ZAC and asked if I could put a 2" spacer between the fork  and the nose gear strut.  Answer was yes.  I now sit a slightly  positve angle of attack on the ground and when taking off there is no ptich up  tnendency as when you rotate form an negative AOA to a positive AOA. Which I saw  when I flew ZAC's 701.  

 You can see a pix at www.geocities.com/cffd66 look under  "Airplane" then " Ready for Inspection".  I just used 8 long  bolts through the solid block.

  

 Chuck D.

 N701TX

  

  

  

 Time: 09:14:45  AM PST US

Subject: Re: WD prop 701/912ul

From:  "ricklach" <[url=]rick(at)ravengear.us[/url]>

Hi Carl,



Ive been thinking of adding a spacer/plug  to the front strut to get more prop ground

clearance as you have done. I  would love to see a picture or two of yours

to see how it turned  out.



Thanks 



Rick



--------

Rick

N35 26.700,   W118 16.743



   [quote][b]

randy(at)rjhebertassoc.co
Guest

Posted: Wed Feb 04, 2009 10:49 am Post subject: WD prop 701/912ul

Chuck  

That service is temporarily out of service.  

What is the block made of?  

     

Randall J Hebert  

    

   

Rick,  

    

   

    

In 1998 when I built my hanger,   

   

    

Chuck D.  

    

N701TX  

    

   

    

   

  

      [quote][b]

kmccune

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

Posted: Wed Feb 04, 2009 11:08 am Post subject: Re: WD prop 701/912ul

Chuck what height were you able to get the SP version tail height down to using the 2" spacer? I wouldn't need to modify the shed... I mean hanger as much, if I could fit the 701 in an 8 foot tall door.



Kevin

_________________
“Always do what you are afraid to do.”
R.W. Emerson (1803-1882)

"Real freedom is the sustained act of being an individual." WW - 2009

"Life is a good deal...it's worth it" Feb 1969
Dorothy McCune

ggower_99(at)yahoo.com
Guest

Posted: Wed Feb 04, 2009 3:22 pm Post subject: WD prop 701/912ul

Hello Kevin,

  

 If you install a little roller in the rear tie down ring,  you can roll the airplane around the hangar,  just check the height of the leading edges and probably the propeller (cant remember what is higher).

  

 I put my 701 in that position outside my hangar to wash and wax the wings, empenage and the rear top fuselage.  I also use a piece of wood about 1"l so the rudder will not touch the floor.

 If the airplane is corect balanced will stay there, just in case I add a 10 lbs sac in the center of the empenage, if I have to leave it unatended.   

  

 Just push down gently on the rear fuselage, near the stabilizer  with the arm.

  

 Saludos

 Gary Gower

 



--- On Wed, 2/4/09, kmccune <kmccune(at)somtel.net> wrote:



  	  Quote: 	
		  From: kmccune <kmccune(at)somtel.net>

Subject: Re: WD prop 701/912ul

To: zenith701801-list(at)matronics.com

Date: Wednesday, February 4, 2009, 2:08 PM



 	  Quote: 	
		  --> Zenith701801-List message posted by: "kmccune"

<kmccune(at)somtel.net>



Chuck what height were you able to get the SP version tail height down to using

the 2" spacer? I wouldn't need to modify the shed... I mean hanger as

much, if I could fit the 701 in an 8 foot tall door.



Kevin



--------

Mark Twain: Twenty years from now you will be more disappointed by the things

that you didn't do than by the ones you did do. So throw off the bowlines.

Sail away from the safe harbor. Catch the trade winds in your sails. Explore.

Dream. Discover.





Read this topic online here:



http://forums.matronics.com/viewtopic.php?p 28496#228496





	
	


           [quote][b]

cffd(at)pgrb.com
Guest

Posted: Thu Feb 05, 2009 3:56 pm Post subject: WD prop 701/912ul

Kevin,

  

 My block is a solid block of aluminum 2"  high.  Extending the nose gear 2 inches lowered the tail about 6  inches.  With my Jab 2200 and batteries on the fire wall, my cg was still  towards the back so the solid aluminum helped the cg a teeny bit.

  

 Chuck D.

  

 Time: 11:08:40  AM PST US

Subject: Re: WD prop 701/912ul

From:  "kmccune" <[url=]kmccune(at)somtel.net[/url]>

Chuck what height were you able to get the SP version  tail height down to using

the 2" spacer? I wouldn't need to modify the  shed... I mean hanger as much, if

I could fit the 701 in an 8 foot tall  door.



Kevin



   [quote][b]

b.carl@sympatico.ca

Joined: 20 May 2008
Posts: 77

Posted: Thu Feb 05, 2009 5:37 pm Post subject: WD prop 701/912ul

Rick

Unfortunately I only flew-off the first 25 hrs on wheel back in 95. My a/c 

has been on amphibs since and the only picture I can find of the nosewheel 

strut extension is not great. It was taken after the first test flight and 

you can see the top joint but the top of the nose fork is in the shadows.

I scratch built so I just made two extra strut plates, welded them to a 4" 

piece of cromemoly (Same as the strut) and bolted it between the strut and 

the fork.

For those who have a problem with door clearance I include a picture of my 

a/c on floats with a longer nose strut to clear a 9' door. You can see that 

the a/c sit on the ground with a 5' positive angle. (That's the thrust, 

cabin tube line). The wing has a +2.5'  angle of incidence so rolling with 

all three wheels on the ground I have +7.5' angle of attack. .

The only negative with this is you must make sure you get the nose up to 

above 10' on landing so you don't land nose wheel first and get into a 

porpoise. That should not be a problem for the slated 701

Hope this helps

Carl



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graeme(at)coletoolcentre.
Guest

Posted: Thu Feb 05, 2009 6:34 pm Post subject: WD prop 701/912ul

when I had ground clearance problem with new replacement undecarrage.

I just cut a piece of rhs steel  50mm high 8 short bolts

worked will cheap



graemecns

 	  Quote: 	
		  >

> I?ve been thinking of adding a spacer/plug to the front strut to get more

> prop ground clearance as you have done. I would love to see a picture or

> two of yours to see how it turned out.

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