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notsew_evets(at)frontiern
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 Posted: Thu Nov 27, 2008 4:05 pm Post subject: Jabiru 3300A engine mount |
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Today I ran my 3300 for the first time.
Only thing I didnt like was the flexing of the engine mount. It really flexes from side to side.
Do you other 3300 owners have the same situation??
Steve
[quote][b]
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DaveG601XL
Joined: 27 Oct 2006
Posts: 351
Location: Cincinnati, Oh
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| Posted: Mon Dec 01, 2008 8:45 am Post subject: Re: Jabiru 3300A engine mount |
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Steve,
I can't say that I have ever noticed any Jabiru engine movement that concerned me. But I have been in the cockpit for every second that my engine has run so it is only one point of view.
I will look closer the next time I do run it.
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David Gallagher
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notsew_evets(at)frontiern
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| Posted: Tue Dec 02, 2008 5:07 am Post subject: Jabiru 3300A engine mount |
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Thanks Dave
You can check this before start up. Just grab the prop when its horizontal
and give it a pushpull. Mine, I can see the tip of the spinner move about
3/4 of an inch left and right. Eddie in Austrialia checked his and his was
"sloppy" also. Must be normal
---
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DaveG601XL
Joined: 27 Oct 2006
Posts: 351
Location: Cincinnati, Oh
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| Posted: Tue Dec 02, 2008 10:17 am Post subject: Re: Jabiru 3300A engine mount |
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OK, I see your point now. You are talking about static flexing in the rubber mount pieces. I have noticed this movement also and check it on pre-flight inspections too see if it has changed from flight to flight. I have checked the security of the mount bolts that squash the rubber a couple of times and they still are torqued correctly.
Good luck on your engine runs!
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David Gallagher
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notsew_evets(at)frontiern
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| Posted: Tue Dec 02, 2008 11:08 am Post subject: Jabiru 3300A engine mount |
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So here is my story today.
The movement of the engine in the rubber mounts doesnt bother me. I see
that in all aircraft engines. My issue is in the steel tubes. The two
upper steel engine mounts from the firewall to the aluminum mount plate on
the engine.
have quite a bit of movement . I assume they should "flex" somewhat but
how much.
One Jabiru rep says its normal. The other seems to think not....
OK, I ll go along with that. However I ve been building aircraft since 1967
and have never noticed this much movement in other aircraft mounts.....
I might be picking the pepper out of the fly S#(at)t, we will see...
---
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n801bh(at)netzero.com
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| Posted: Tue Dec 02, 2008 2:18 pm Post subject: Jabiru 3300A engine mount |
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That is a major concern in my book.. Are the welds ok? Did this mount come partially fabricated and needing additional welding once the motor is mounted and thrust angles set? Keep us posted on the results please.
do not archive
Ben Haas
N801BH
www.haaspowerair.com
-- "steve" <notsew_evets(at)frontiernet.net> wrote:
--> Zenith-List message posted by: "steve" <notsew_evets(at)frontiernet.net>
So here is my story today.
The movement of the engine in the rubber mounts doesnt bother me. I see
that in all aircraft engines. My issue is in the steel tubes. The two
upper steel engine mounts from the firewall to the aluminum mount plate on
the engine.
have quite a bit of movement . I assume they should "flex" somewhat but
how much.
One Jabiru rep says its normal. The other seems to think not....
OK, I ll go along with that. However I ve been building aircraft since 1967
and have never noticed this much movement in other aircraft mounts.....
I might be picking the pepper out of the fly S#(at)t, we will see...
---
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notsew_evets(at)frontiern
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| Posted: Tue Dec 02, 2008 3:26 pm Post subject: Jabiru 3300A engine mount |
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My engine mount came totally finished (except paint).
At the firewall and at the rubber shock mounts its fine. I just dont like the flexing...... which is in the top two steel tubes....
I m asking all Jabiru / 601XL builders and pilots to check their side to side "play". Watch the tip of the spinner and let us know how much it moves side to side...
With the prop in the horizontal position, grab the blades and do a push/pull.
Thanks......
SW
[quote] ---
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craig(at)craigandjean.com
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| Posted: Tue Dec 02, 2008 3:46 pm Post subject: Jabiru 3300A engine mount |
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"Fine if you are running on all cylinders"
One difference compared to the O-200 is that the Jabiru 3300 is a 6 cylinder
engine. I am guessing the piston travel is shorter too.
As I recall folks flying Corvairs in 601XLs (also a six cylinder engine but
with a bed mount) have lost a cylinder and found the vibration manageable.
-- Craig
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