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Who says Chris Heintz stole the Cri-Cri plans? I happened to ride to dinner
with Chris and Michel at Oshkosh during the show where they made their deal
on the Cri-Cri. I know nothing of their agreement but in my dealings with
Chris I've never found him anything but honest and very helpful.
I built a plans built Zenith (CH200},first flew in /79, and built
the first 801, not a kit, first flight in/98. The latter on a handshake
agreement with Chris.
"Richard Riley" <rtriley@gmail.com> wrote in message
news:1150810476.031478.272330@u72g2000cwu.googlegroups.com...
>
> Gig 601XL Builder wrote:
>
>> Zenith did a Cri-Cri? When was that? Any photos out there?
>
> A very long time ago - like, in the 70's. As I understand it there
> were a lot of materials substitution that proved to be inadequate.
> Here are a couple of quotes from the cri-cri mailing list.
>
>
>> The Laison tube runs across the fuselage under the knees
>> of the pilot. It connects the movement of the two flaperons. It also
>> mounts the bellcranks for the flaperon "aileron" action, and also rotates
>> to make the "flap" action.
>>
>> The Zenair tube is made from thin steel tube, maybe 19mm diam. It is
>> flexible and acts like a tuning fork. Any induced deflection of one
>> flaperon is amplified into the other flaperon, and you get a flutter that
>> continues until some connection between the flaperons breaks OR until
>> something ELSE on the airplane breaks and it becomes uncontrollable...
>> There have been 6 known cases of Cricket flutter; the one fatality was
>> Jim Harper.
>>
>> The Colomban tube is 32mm, and made of stiff aluminum.
>> As you know, most people think of aluminum just for it's lightness, but
>> aircraft designers use the fact that it is STIFF.
>> The Columban tube is too stiff to transmit any induced deflection from
>> one flaperon to the other.
>>
>> Also please tell your friend about the elevator actuator connection. The
>> Zenair modification (307.07m) is just 2 little pieces of bent aluminum.
>> They are NOT strong enough. Use the machined fitting as described in the
>> original plans !!!!!!!!!!!!!
>>
>> The same is true for all other parts of the control system.
>> Cheap substitutes of parts pivoting directly on bolts instead of using
>> the ball joints ("heim joints") called for in the blueprint, etc., etc.
>> ALWAYS FOLLOW THE ORIGINAL PLANS...
>
>
> and this
>
>>Hi all'
>>I'm an IA and I've long been excited about the CriCri.
>>I purchased plans from Zenair in 1996 and was told by them that
>>I got the last set. My question is about the Zenair plans.Are they the
>>same plans as the desingers? I believe I read in the archives that they
>>are the same and you should build from them and ignore Heintz's
>>modifications. Thanks for your help Rocky Lennon
>
> Dear Rocky,
> You got it right, there were no "Zenair" plans, they merely
> went to the local blueprint shop and ran off copies of the
> "desingers" original.
>
> Follow those plans and you will be OK.
> There are 2 changes Michel approves of (but does not get involved in).
>
> 1. Go to a modern mechanical disc brake such as found on a go-kart.
>
> 2. The JPX engine is inadequate, and it looks like good progress
> is being made in adapting 3W engines. See the earlier posts.
>
> A request for you:
> What is the Zenair serial # on your plans???
> If they are the last set, that will tell us how many
> plans Heintz stole from Michel without paying royalties...
>
> Have fun...David
>
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Re: Zenith Aircraft
