Today's Message Index:
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1. 06:59 AM - 601XL B 3300 carb / left - right bank temp differential (Rich)
2. 07:23 AM - Re: 601XL B 3300 carb / left - right bank temp differential (Mark Hubelbank)
Message 1
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| Subject: | 601XL B 3300 carb / left - right bank temp differential |
For the record I am building a 601XL (B) with the Jabiru 3300!
Over the past years of building my plane and reading the Matronics list for the
Jabiru 3300 Engine and the Zenith list there has been a lot of conversation
on Left/Right Bank Temp differential due to the sharp bend of the intake hose
joining the Air box to Carb. I have read on the forums simply twisting the Carb
a bit in its couplings and this improves the condition. Others may also add
veins in the intake tube to straighten out the airflow a bit. For a While, the
Cobra tube was offered but that source has moved on to other things in life
so they say.
My thoughts are to rotate the tube on the Carb 90 degrees and then plumb my way
back to the air box and also moving the coupling on the air box.
So with my above statements, what is the better way to attack this problem before
my targeted first flight next spring since I am still in the wiring and final
installation mode?
I know this will draw many opinions but I consider learning from what others did
and listening to wise old owls is probably a good thing!
Thanks for sharing your opinion and what you did yourself.
Regards,
Rich Simmons
Murfreesboro, TN
- Rich
Message 2
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| Subject: | Re: 601XL B 3300 carb / left - right bank temp differential |
Rich,
I has a similar configuration when I had a Jabiru, finally switched
to the Rotac carb but I think one observation may still be significant.
I found that having the airflow come from the top instead of from one
side significantly helped with the Rotec and I expect it would with the
Bing. I believe this was because the airflow even with straighteners or
a "Cobra" is still unsymmetrical and with airflow from the top it is
more symmetric - at least from side to side.
Unfourtunately, the airbox as supplied by Jabiru does not make
such air routing easy, it would need to be modified. Something to
consider. You can see www.n708hu.com 1066 and 1069. More hose than I
would have liked but it did work.
On 09/26/2013 9:58 AM, Rich wrote:
>
> For the record I am building a 601XL (B) with the Jabiru 3300!
> Over the past years of building my plane and reading the Matronics list for the
Jabiru 3300 Engine and the Zenith list there has been a lot of conversation
on Left/Right Bank Temp differential due to the sharp bend of the intake hose
joining the Air box to Carb. I have read on the forums simply twisting the
Carb a bit in its couplings and this improves the condition. Others may also add
veins in the intake tube to straighten out the airflow a bit. For a While,
the Cobra tube was offered but that source has moved on to other things in life
so they say.
>
> My thoughts are to rotate the tube on the Carb 90 degrees and then plumb my way
back to the air box and also moving the coupling on the air box.
>
> So with my above statements, what is the better way to attack this problem before
my targeted first flight next spring since I am still in the wiring and final
installation mode?
>
> I know this will draw many opinions but I consider learning from what others
did and listening to wise old owls is probably a good thing!
>
> Thanks for sharing your opinion and what you did yourself.
>
> Regards,
> Rich Simmons
> Murfreesboro, TN
>
> - Rich
>
>
--
Mark Hubelbank
NorthEast Monitoring
2 Clock Tower Place
Suite 555
Maynard, MA, 01754 - USA
mhubel@nemon.com
978-443-3955
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