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CH601HD/HDS Main Gear

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skyguynca

Joined: 05 Jun 2006
Posts: 128

Posted: Sat Jun 10, 2006 6:29 pm Post subject: CH601HD/HDS Main Gear

I have seen a few pictures of the spring type gear  on a HDS. Does anyone know how the ribs and internal structure of the center  wing section was modified to accept the stress and support the spring gear  mounts? I am really interested in doing it to mine but would like to know what  all is required.

  

 Thanks,

  

 David Mikesell

23597 N. Hwy 99

Acampo, CA  95220

209-609-8774

skyguynca(at)skyguynca.com (skyguynca(at)skyguynca.com)

www.skyguynca.com

larry(at)macsmachine.com
Guest

Posted: Sun Jun 11, 2006 5:48 am Post subject: CH601HD/HDS Main Gear

David,

The pictures attached give an idea of what was done in this case.  

Though I don't believe the spring gear has any advantage

due to its weight and light attachment if you repeat XL structure.  You 

damage the spring gear and you destroy the fuselage

and all.



Larry McFarland - 601HDS at www.macsmachine.com

do not archive



David Mikesell wrote:



 	  Quote: 	
		   I have seen a few pictures of the spring type gear on a HDS. Does 

 anyone know how the ribs and internal structure of the center wing 

 section was modified to accept the stress and support the spring gear 

 mounts? I am really interested in doing it to mine but would like to 

 know what all is required.

  

 Thanks,

  

 David Mikesell

 23597 N. Hwy 99

 Acampo, CA 95220

 209-609-8774

 skyguynca(at)skyguynca.com <mailto:skyguynca(at)skyguynca.com>

 www.skyguynca.com <http://www.skyguynca.com>

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craig(at)craigandjean.com
Guest

Posted: Mon Jun 12, 2006 8:41 am Post subject: CH601HD/HDS Main Gear

I'm fairly ignorant of the internals of an HDS wing: why keep the stubs of

the old gear? They sure look draggy.



-- Craig



--

skyguynca

Joined: 05 Jun 2006
Posts: 128

Posted: Mon Jun 12, 2006 9:11 am Post subject: CH601HD/HDS Main Gear

Really I am not looking for a "advantage" of weight. I just prefer

spring gear. I really don't know how the XL gear is done hence why I

am asking for help.



--

craig(at)craigandjean.com
Guest

Posted: Mon Jun 12, 2006 9:37 am Post subject: CH601HD/HDS Main Gear

I was asking about Larry's plane specifically. From what I see in his photos

he has the spring gear but still has the stubs of the factory gear

protruding from the bottom of the wings.



-- Craig 



--

larry(at)macsmachine.com
Guest

Posted: Mon Jun 12, 2006 9:42 am Post subject: CH601HD/HDS Main Gear

Craig,

I think in considering the weight that was added, the builder may have 

had second thoughts about

what he'd done.  The old gear looked like it had been there for a long 

time without paint.

I'd have replaced the old gear struts or blasted and painted them again.



Larry Mc

do not archive



Craig Payne wrote:



 	  Quote: 	
		  



I'm fairly ignorant of the internals of an HDS wing: why keep the stubs of

the old gear? They sure look draggy.



-- Craig

larry(at)macsmachine.com
Guest

Posted: Mon Jun 12, 2006 9:48 am Post subject: CH601HD/HDS Main Gear

David,

You might look closely at the image of the gear and fuselage exploded 

view on the Zenith site, see link.

http://www.zenithair.com/zodiac/xl/drawings.html

It might be a little difficult to do on a HDS correctly because of the 

tie across the bottom and vertical

supports.

Larry Mc

do not archive

David Mikesell wrote:

 	  Quote: 	

Really I am not looking for a "advantage" of weight. I just prefer

spring gear. I really don't know how the XL gear is done hence why I

am asking for help.

>    

>

skyguynca

Joined: 05 Jun 2006
Posts: 128

Posted: Mon Jun 12, 2006 11:38 am Post subject: CH601HD/HDS Main Gear

Thanks Larry.



David Mikesell

23597 N. Hwy 99

Acampo, CA 95220

209-609-8774

skyguynca(at)skyguynca.com

www.skyguynca.com

---

btucke73(at)yahoo.com
Guest

Posted: Mon Jun 12, 2006 7:14 pm Post subject: CH601HD/HDS Main Gear

Gents,



     I built spring gear mounts for my taildragger HDS

from pictures supplied to me by another builder. 

After some ground testing, and jumping the plane up

and down under weight, I found that the forward

fuselage bottom skin is starting to concave.  There is

no way it would be able to handle a hard landing.  I

am currently rebuilding the mount situation, using the

XL plans for guidance (which is what I should have

done in the first place).  Having been through the

process, I am not sure that I would build a spring

gear again.  It would probably be a whole lot easier

building mounts for a tri-gear, but it has been a pain

for the taildragger.  I am getting to the point where

I am regretting deviation from the plans.  Those of

you who are thinking of this mod, give it some good

thought.  I think I jumped in a little too hastily. 

ADHD is a bitch!



      -Please, no "I told you so's."  I can see some

of you chomping at the bit as you read this!



R/



Brandon



__________________________________________________

naumuk(at)alltel.net
Guest

Posted: Tue Jun 13, 2006 2:58 pm Post subject: CH601HD/HDS Main Gear

Brandon-

    There are times you can deviate from the plans, but you have to admit, 

messing with the gear is about the worst choice of a place to experiment.

    On the other hand, they don't call these "Experimental" aircraft for 

nothing. I applaud you for your willingness to try a variation, but I think 

you have to move the proving stage further upstream.

    Right now, you're a coroner, examining the final result. If you would 

have built a proof of concept scale model, you probably would have detected 

the negative effects earlier, before a major rebuild became necessary. Pain 

in the ass, additional time and expense, you bet. Less work and lots more 

peace of mind down the line, you bet.

    Good building.

                                                                             

                                                                    Bill

---

naumuk(at)alltel.net
Guest

Posted: Tue Jun 13, 2006 5:06 pm Post subject: CH601HD/HDS Main Gear

By the way, I didn't come up with this idea on my own. A couple of 

EAAers from Ohio by the name of Wright were the originators.

                                                           Bill

---

btucke73(at)yahoo.com
Guest

Posted: Thu Jun 15, 2006 6:44 pm Post subject: CH601HD/HDS Main Gear

Bill,



 	  Quote: 	
		  From my original post:


	


 	  Quote: 	
		  >      -Please, no "I told you so's."  I can see some

>      of you chomping at the bit as you read this!


	


     I didn't send my initial response to this - too

irritated.  This is the calmer response after a 24

hour cool down.  I even took out the expletives.  No,

I do not admit that the gear is about the worst place

to deviate from the plans.  I would say that the wing

spar, or the control surfaces would probably be a

slightly more catastrophic failure, should something

get too "Experimental."  You are correct in that I did

not build a scaled model.  As I said in the original

post, there is already a flying example of the design.

 Will that meet your "Proof of concept" criterion?  I

guess I assumed that full scale and operational would

do it.  



     Thank you so much for not literally saying "I

told you so."  That would have simply been rude.  It

may have been equally constructive while utilizing

substantially less bytes though.  



Brandon



DO NOT ARCHIVE



 	  Quote: 	
		   Brandon-

    There are times you can deviate from the plans,

but you have to admit, 
	


 	  Quote: 	
		   messing with the gear is about the worst choice of a

place to experiment.
	


 	  Quote: 	
		      On the other hand, they don't call these

"Experimental" aircraft for 
	


 	  Quote: 	
		   nothing. I applaud you for your willingness to try a

variation, but I 
	


 	  Quote: 	
		   think you have to move the proving stage further

upstream.
	


 	  Quote: 	
		      Right now, you're a coroner, examining the final

result. If you would 
	


 	  Quote: 	
		   have built a proof of concept scale model, you

probably would have 
	


 	  Quote: 	
		   detected the negative effects earlier, before a

major rebuild became 
	


 	  Quote: 	
		   necessary. Pain in the ass, additional time and

expense, you bet. Less 
	


 	  Quote: 	
		   work and lots more peace of mind down the line, you

bet.
	


 	  Quote: 	
		      Good building.


	


__________________________________________________

JAPhillipsGA(at)aol.com
Guest

Posted: Fri Jun 16, 2006 8:55 am Post subject: CH601HD/HDS Main Gear

Brandon, is there anything we can do to assist you in putting the pieces back together again ? Let us know, Best regards, Bill of Georgia

rdewees(at)mindspring.com
Guest

Posted: Fri Jun 16, 2006 12:34 pm Post subject: CH601HD/HDS Main Gear

Brandon,

I thought the gear legs look like a great platform for hard points to 

mount machine guns and bombs on.  Have you considered a military 

conversion? Early Mooney Mites were once fitted with .30 cal guns for an 

Army contract.  It didnt' work out tho 



Ron



Definitely don't archive



JAPhillipsGA(at)aol.com wrote:



 	  Quote: 	
		   Brandon, is there anything we can do to assist you in putting the 

 pieces back together again ? Let us know, Best regards, Bill of Georgia

naumuk(at)alltel.net
Guest

Posted: Fri Jun 16, 2006 2:46 pm Post subject: CH601HD/HDS Main Gear

Brandon-

    The last thing I would ever say is "I told you so" to someone with the 

gumption to experiment, and I apologize if my post was written in such a way 

as to imply that. I really do. Also, I always have to present the results of 

"Proof of concept" experiments at work before getting free rein to the 

checkbook, and forget that other people don't do this automatically, like 

Pavlov's dog. Sometimes POC is a really good policy, and sometimes it's a 

PITA that holds projects back unnecessarily.

     The fact that you had the restraint to wait before answering is a good 

sign in that you have the patience to work your way out of your mess.

     If there is a flying example with your gear mod, (You've probably come 

to this conclusion yourself) do some more research and find out what you 

missed. There had to be something, or you would be airworthy. Hopefully, 

it's just some additional bracing that won't require a major rebuild.

    Good luck. We're all in this together, and I'm pulling for you. (Red 

Green, 19(??) to date). I deleted your original message to cut down on the 

bandwidth.

                                                                    Bill

                                  do not archive

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