Today's Message Index:
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1. 02:12 AM - Re: What happens if you overspeed a 91X? (David Joyce)
2. 07:13 AM - Re: What happens if you overspeed a 91X? (rampil)
3. 07:58 AM - Re: What happens if you overspeed a 91X? (lucien)
4. 06:15 PM - Delayed New LSA rules (Roger Lee)
Message 1
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| Subject: | Re: What happens if you overspeed a 91X? |
Ron, The UK Rotax agent procedure for modest overspeeding (between 6000 &
6100 rpm) was to remove the push rods and check them for straightness using
a sort of cradle and a micrometer measuring device. If that is OK no further
checks are needed.
Regards, David Joyce, G-XSDJ
----- Original Message -----
From: <rparigor@suffolk.lib.ny.us>
Sent: Monday, January 04, 2010 7:10 PM
Subject: RotaxEngines-List: What happens if you overspeed a 91X?
>
>
> Hi Ira
> I am curious what failure occurs if you overspeed a 91X?
> You mentioned:
> " what will happen is that above 6000
> engine rpm, the speed of the hydraulic valve lifters is inadequate to
> completely open and close. They essentially float out of synch and
> get bent out of straight by the cams."
> I am not sure what
> you said, do the hydraulic valve lifters themselves get bent by overspeed?
> I always assumed that the mass of valve train has more inertia than can be
> held by the valve springs where the valve lifters are in contact with the
> cam (valve float)? Then a valve is left opened where it shouldn't be and a
> piston contacts the valve and bends the valve, and probably also the
> pushrod? Another question, since the 912S has a different cam grind
> than the 912 or 914, does overspeed problems occur at the same
> RPM as 912 or 914?
> Thx.
> Ron Parigoris
>
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| Subject: | Re: What happens if you overspeed a 91X? |
Hi All,
The push rod check is all that is required IF the overspeed
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=280222#280222
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| Subject: | Re: What happens if you overspeed a 91X? |
bob(at)fly-ul.com wrote:
>
> For what its worth, In the 912 Line maintenance manual (05-50-00, section 3.3),
the inspections exceeding max RPMs are addressed. Yes, Pushrods are on the
"list" of things to inspect.
> --
> Bob Comperini
> e-mail: bob@fly-ul.com
> WWW: http://www.fly-ul.com
Unfortunately the manual leaves out the following step in this case:
- go to bank (with gun)
;)
LS
--------
LS
Titan II SS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=280232#280232
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| Subject: | Delayed New LSA rules |
Hi All,
Just a little update. Talked to Edsel Ford off the FAA today about the up coming
LSA rule changes that I was originally told was due out mid Dec. Seems that
the rule changes are done and have been sitting on the Director's desk for a while
and they are waiting for him to sign them. No one seems to know what the
hold up is. So it could be days or weeks. When these rules are posted they may
not have an immediate effective date. They could be effective tomorrow or April.
We will have to look at them to see when each effective phase in date occurs.
Here are where the rules will turn up first.
http://rgl.faa.gov/Regulatory_and_Gu...meset?OpenPage
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=280314#280314
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