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I was aware of Larry David's problems, and also
Chris's problems with the Jeffco over ezpoxy. Am not familiar with the KIS at
Mason-Jewett. I operate a list-serve for KIS airplanes, and it had not been
mentioned. He may not be on the list.
My plane used Aero-poxy 2032 resin, which has been
over coated with Jeffco 9700-FCR. A Hysol product was used to bond the bottom
wing skin to the spar/ribs. The bond lines could not be covered with the
Jeffco.
I believe many Lancairs use the Jeffco
also.
Years ago we did a test of some sample coupons
coated with the two epoxies, and the Jeffco withstood the gasohol, but did have
some weight-gain, this bothered me, because it would indicate that the alcohol
was penetrating the epoxy, and therefore could affect the underlying
base-coat.
As a result, my tanks are labeled to accept 87-100
Octane, no alcohol. I will use avgas unless I can find a source of Mo-gas
without alcohol.
Thanks for the heads up.
David, could you pass on the information on the KIS
driver? I would like to be in communication with him.
Bill Schertz
KIS Cruiser #4045
N343BS
----- Original Message -----
Sent: Tuesday, January 20, 2009 8:53
PM
Subject: [FlyRotary] Re: KIS epoxy
type
Another Kiss
driver here at Mason Jewett Airport has debris in tanks, do not know the
extent but he is cutting the tanks open now to find out, already borescoped
them and was not happy, nice aircraft, nice guy one of our very active members
EAA Chapter 55. David R Cook RV6A ROTARY. ----- Original Message
----- From: "Al Gietzen" < ALVentures@cox.net> To: "Rotary
motors in aircraft" <flyrotary@lancaironline.net> Sent: Tuesday,
January 20, 2009 7:55:57 PM GMT -05:00 US/Canada Eastern Subject:
[FlyRotary] KIS epoxy type
Bill;
The current issue of Contact!
magazine has an article regarding serious damage to the epoxy fuel tanks on a
KIS that the author (Larry David) concluded was the result of using 10%
ethanol fuel. He didn’t specify what type of epoxy was used, and his
response to my e-mail to him was that he did not build the plane and didn’t
know what epoxy was specified for the KIS.
It is of interest since Chris,
our rotary powered Velocity
friend, had a similar nightmare with his fuel tanks. Thought maybe you’d
know. In Chris’s case it was Jeffco coating over EZ-poxy that peeled
off. In this case it was ‘whatever’ epoxy coating over ‘whatever’ epoxy;
and the fillets under the coating, and the wing spar were also damaged.
Perhaps you are familiar with the case.
Al
G
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