Dale Medendorp
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  • Crystal Lake, IL
  • United States
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Panel Design and Layout

Started this discussion. Last reply by Aaron May Jan 6, 2013. 11 Replies


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Dale Medendorp's Blog

Taildragger CG

Posted on October 1, 2011 at 2:57pm 0 Comments

I'm building a CH650 with the taildragger option.  Can I expect the empty CG to be more forward, aft or the same compared to a comparable equipped nosewheel CH601/650?

I can probably calculate the difference if I had accurate weight numbers for the nosewheel assembly.  I would assume the same weight for the mains, just a different moment arm.

Any info will be greatly appreciated!



(wings and empennage done, working on fuselage)

Shipping issues

Posted on June 4, 2011 at 3:33pm 5 Comments

My fuselage and finishing kits arrived yesterday by truck in a large crate.  I talked to the shipping company that morning and asked if I needed anything at my end to offload the crate.  They said the driver would have everything that's needed.  Wrong!


The driver's first question when he arrived was "do you have a forklift?".  Because the crate was 10+ feet long, his pallet jack would only lift one end and he didn't think he'd be able to turn it to get it on the power lift on…


Inspect removed rivets

Posted on December 4, 2009 at 1:59pm 5 Comments

The procedure I use to remove the AD-6 rivets from the spar for the upgrade is to first drill through the head with a 5/32 drill, shear the head off with a chisel, and then drill about 1/4" into the rivet with a 1/8" drill. I then use a 1/8" punch with an air hammer and push the rivet out.

The last thing I do is inspect the rivet to make sure that the drilling operation didn't go beyond the circumference of the rivet resulting in an enlarged hole in the spar. I'm happy to report that… Continue

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At 6:49am on June 18, 2021, Michael Mccarthy said…


My name is Mr. Michael Mccarthy, I have contacted you before without any response from you. Please replied if you receive this message. I have something very important to discuss with you, I have a vital information to give you. Could you please get back to me on (mmichaelmccarthy4@gmail.com ) for full details.

Michael Mccarthy.

At 11:31am on March 30, 2015, Peter D Miller said…
Dale, are you related to Nick? I Got my phd in materials science with him at Purdue. I fly a zenith 750 in Vermont. Congrats on your first flight!
Pete miller
At 10:16pm on October 5, 2009, Raymond Aten said…
Yes, the Bellcrank support is my attempt at finding a simple solution.
A triangle seemed strong and light and the rib mount is a replica of that at the bellcrank.
At 3:13pm on September 26, 2009, Brenda Smith said…
At 3:05pm on September 26, 2009, Brenda Smith said…Yes we have the same problem. We 1 " rivited a spacer to the rear spar which then catches all of the prelocated holes. Our hangar mates are also building a 650. Their kit was delivered with different side skins that are longer. They had to trim some off behind the rear spar. We also have some problems with the seat/spar access panels are too long. We have cut them and rebent to fit the arm rest panels.
I think we all are having some issues in the forward area. Zenith has offered a new spar and skins but we do not think we will excercise this option. We can post some pictures Sunday of our modifications if you wish.

Delete Comment
At 3:07pm on September 25, 2009, Brenda Smith said…
Where are you at in the assembly process. We are having issues with the forward skins and center spar and seat back?

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