Today's Message Index:
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1. 06:10 AM - Re: prop drive belt failure (Weston, Jim)
2. 09:15 AM - Re: prop drive belt failure (John Karnes)
3. 03:36 PM - Re: Prop belt drive failure (Bill Morelli)
Message 1
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| Subject: | prop drive belt failure |
--> Stratus-List message posted by: "Weston, Jim" <Jim.Weston@delta.com>
John...Sorry to hear about your problem. This is important safety info.
Did the entire belt layer of teeth separate from the other layers of the
belt, or did the teeth all shear off? It will help to know what to look
for. I have the same belt that was changed when Stratus changed from
the dual 30mm to the single 60mm belt. I now have about 180 hours on
the new belt.
Thanks and glad you and your plane are ok,
Jim Weston
Concord, GA
-----Original Message-----
From: owner-stratus-list-server@matronics.com
[mailto:owner-stratus-list-server@matronics.com] On Behalf Of John
Karnes
Subject: Stratus-List: prop drive belt failure
--> Stratus-List message posted by: "John Karnes" <jpkarnes2000@msn.com>
On power up yesterday, I experienced a belt failure. Luckily, I still
was on the ground. The belt had about 80 hours on it but dated back to
when Stratus changed from two belts to one (about three to fours ago?).
Upon examination, the "teeth" on the inside of the belt separated from
the rest of the belt, thus causing the belt to lose grip of the pulley
and resulted in a failure. When I called Mykal, he said that "materials
degrade over time and the belt should be changed out every year". This,
of course, is contrary to his published maintenance schedule for this
item. Given the critical nature of this part and my recent experience,
I would have to agree and recommend a yearly change out of the belt. I
can't imagine the end result of a belt failure over hostile
terrain...=0D=0A=0D=0AJohn Karnes=0D=0AN601JK Zenith
601HDS=0D=0AWashington
Message 2
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| Subject: | Re: prop drive belt failure |
--> Stratus-List message posted by: "John Karnes" <jpkarnes2000@msn.com>
About 90% of the teeth separated from the outer belt. The remaining belted teeth could be lifted as a layer from the outer belt. You could take your fingernail and separate the teeth on the side of the belt. It is obvious that the adhesive holding the teeth to the belt had broken down. I would watch that belt like a hawk... Thanks for your expression of concern. It is more than I got when I called Stratus and described the incident...=0D=0A=0D=0AJohn Karnes=0D=0ABremerton, WA=0D=0A ----- Original Message ----- =0D=0A From: Weston, Jim<mailto:JimWeston@delta.com> =0D=0A To: stratus-list@matronics.com<mailto:stratus-list@matronics.com> =0D=0A Sent: Tuesday, July 26, 2005 6:10 AM=0D=0A Subject: RE: Stratus-List: prop drive belt failure=0D=0A=0D=0A=0D=0A --> Stratus-List message posted by: "Weston, Jim" <Jim.Weston@delta.com<mailto:Jim.Weston@delta.com>>=0D=0A=0D=0A John...Sorry to hear about your problem. This is important safety info.=0D=0A Did the entire belt layer of teeth separate from the other layers of the=0D=0A belt, or did the teeth all shear off? It will help to know what to look=0D=0A for. I have the same belt that was changed when Stratus changed from=0D=0A the dual 30mm to the single 60mm belt. I now have about 180 hours on=0D=0A the new belt.=0D=0A=0D=0A Thanks and glad you and your plane are ok,=0D=0A Jim Weston=0D=0A Concord, GA=0D=0A=0D=0A
Message 3
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| Subject: | RE: Prop belt drive failure |
--> Stratus-List message posted by: "Bill Morelli" <billvt@together.net>
I don't buy the belt needs changing every year statement by Mykal.
I replaced mine the first and only time at 290 hours and the one I removed looked
as good as the new one. I now have 418 hours on the engine so this new belt
is at 128 hours.
Could you tell if possibly the belt loosened up for some reason (tension adjustment
slipped) ?? Was you tension set correctly?
As Frank said, there are quite a number of Stratus engines with a good number of
hours and this is the first report of a belt failure.
Regards,
Bill (N812BM - 601HDS - Tri - Stratus (RAM Heads) - Vermont - 418.6 flight
hrs. - 562 landings
web site -> http://homepages.together.net/~billvt/
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