Today's Message Index:
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1. 02:18 PM - Re: [jabiruengines] A new thread for Jabiru, tires? (Ivan)
2. 02:46 PM - Re: Re: [jabiruengines] A new thread for Jabiru, tires? (Lynn Matteson)
3. 03:27 PM - Re: Re: [jabiruengines] A new thread for Jabiru, tires? (Ivan)
Message 1
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| Subject: | Re: [jabiruengines] A new thread for Jabiru, tires? |
Jabiru pilots
Since tires are paramount for aircraft safety even before getting off
the ground, I thought I would bring up this issue (maybe for a light
change.)
My J-250 calls for main tires of 500 x 5. When I got the aircraft it
came with 4 ply. I wonder if the 500 x 5 tires, 6 ply would be better.
They obviously are rated for more static and breaking load. They are
the same dimensions and weight as the original 4 ply and for the same
price.
It seems intuitive that the 6 ply would be better. I do not know if an
aircraft can specifically be designed to only use the 4 ply and no more,
even given the above data. Incidently the "5" is the rim size but what
is the "500?" It certainly is too big a number for the wheel diameter
or tread width? Any ideas?
Ivan
USA
----- Original Message -----
From: yayoo00007
To: jabiruengines@yahoogroups.com
Sent: Thursday, February 05, 2009 2:35 PM
Subject: [jabiruengines] pulstar plugs
Anyone out there seen any feedback re use of PULSTAR plugs with
aviation engines, Jabiru in particular? I couldn't come up with
anything other than they go for $25. Wow!
Ray
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Message 2
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| Subject: | Re: [jabiruengines] A new thread for Jabiru, tires? |
That number probably refers to the width of the tire at the widest
point, or the width of the rim between the flanges. Are you sure
there isn't a decimal point after the 5......as in 5.00 x 5?
Maybe the manufacturer of the airplane, Jabiru in this case, had a
bit of "springing" in mind with the original 4-ply tires, and going
to the 6-ply would transfer more shock to the landing gear...just a
thought. Sometimes these decisions are made as a compromise, and when
we experimentalists change things, we introduce other factors that
upset the apple cart.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 605 hrs
Sensenich 62x46
Electroair direct-fire ignition system
New skis done and flying
On Feb 5, 2009, at 5:17 PM, Ivan wrote:
> Jabiru pilots
> Since tires are paramount for aircraft safety even before getting
> off the ground, I thought I would bring up this issue (maybe for a
> light change.)
> My J-250 calls for main tires of 500 x 5. When I got the aircraft
> it came with 4 ply. I wonder if the 500 x 5 tires, 6 ply would be
> better. They obviously are rated for more static and breaking
> load. They are the same dimensions and weight as the original 4
> ply and for the same price.
>
> It seems intuitive that the 6 ply would be better. I do not know
> if an aircraft can specifically be designed to only use the 4 ply
> and no more, even given the above data. Incidently the "5" is the
> rim size but what is the "500?" It certainly is too big a number
> for the wheel diameter or tread width? Any ideas?
>
> Ivan
> USA
>
Message 3
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| Subject: | Re: [jabiruengines] A new thread for Jabiru, tires? |
That is true, I would certainly like to hear from Pete regarding if they
had some specific reason why to use 4 ply instead of 6 ply. Good thought
about the springing of the tires, who knows. That is why I always default
to the manufacturer since they have many intricate reasons for doing things
which our "experimenting" mentality always tries to fix without maybe
knowing all the details.
The 500 has no decimal point and 500 x 5 is exactly as it is listed with a
few aviation tire manufacturers. I just cant fit 500 into anything.
Thanks
Ivan
----- Original Message -----
From: "Lynn Matteson" <lynnmatt@jps.net>
Sent: Thursday, February 05, 2009 3:45 PM
Subject: Re: JabiruEngine-List: Re: [jabiruengines] A new thread for Jabiru,
tires?
>
> That number probably refers to the width of the tire at the widest point,
> or the width of the rim between the flanges. Are you sure there isn't a
> decimal point after the 5......as in 5.00 x 5?
> Maybe the manufacturer of the airplane, Jabiru in this case, had a bit of
> "springing" in mind with the original 4-ply tires, and going to the 6-ply
> would transfer more shock to the landing gear...just a thought. Sometimes
> these decisions are made as a compromise, and when we experimentalists
> change things, we introduce other factors that upset the apple cart.
>
> Lynn Matteson
> Kitfox IV Speedster, taildragger
> Jabiru 2200, #2062, 605 hrs
> Sensenich 62x46
> Electroair direct-fire ignition system
> New skis done and flying
>
>
> On Feb 5, 2009, at 5:17 PM, Ivan wrote:
>
>> Jabiru pilots
>> Since tires are paramount for aircraft safety even before getting off
>> the ground, I thought I would bring up this issue (maybe for a light
>> change.)
>> My J-250 calls for main tires of 500 x 5. When I got the aircraft it
>> came with 4 ply. I wonder if the 500 x 5 tires, 6 ply would be better.
>> They obviously are rated for more static and breaking load. They are
>> the same dimensions and weight as the original 4 ply and for the same
>> price.
>>
>> It seems intuitive that the 6 ply would be better. I do not know if an
>> aircraft can specifically be designed to only use the 4 ply and no more,
>> even given the above data. Incidently the "5" is the rim size but what
>> is the "500?" It certainly is too big a number for the wheel diameter
>> or tread width? Any ideas?
>>
>> Ivan
>> USA
>>
>
>
>
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