Thanks to those who have sent me your data.  Please keep them coming.

Also - if you want to be anonymous please say so in the email.   Otherwise I will assume you don't.

Colyn

On Jul 26, 2013, at 11:24 PM, Colyn Case wrote:

Dear Hartzell/550 owners,

If this email looks garbled to you, set your window as wide as you can.

We've been having this discussion about a possible vibration problem but we haven't accumulated much data on

the incidence of the problem or especially the incidence of a non-problem.  To help us sort it out it would be

super helpful if everybody that has the 550/Hartzell combination could please add your information below.

It is just as important to send your info if you DON't have a problem.

(Please use the fixed width font and spaces not tabs).   I volunteer to collect all the responses and publish

the result.    If you would like to be anonymous you can send your information directly to me and I will remove

your n-number and email before publishing.    My email is colyncase@earthlink.net

We have 1000 lancairs or so we think are flying and several hundred IV's with the 76" prop.  It would be great to

get a couple hundred responses.  It would help even more if we could get this before or early into Oshkosh week.

thanks in advance,

Colyn

n-number  email                       lancair     Hartzell prop part      engine model    I have symptoms of the 
                                      model       number                                  discussed vibration issue

                                                                                          (yes/no/not sure)

N136CS    colyncase@earthlink.net      IV-P        HC-H3YF-2UF/FC7693DF    TSIO-550B       not sure