Now I have a dilemma. I have measured the diameter of the inner carburettor at
45mm. The airbox outer tube is 48/49mm - the inner diameter 39 and 42mm (these
measurements after my fix - several layers of bid to strengthen the orifices
after they collapsed under the tightness of the worm driven band).
I have never had a problem with the carburettors and never given any thought to
a mismatch between the two diameters. I was always aware the the box was poorly
finished and the air intakes were easy to crush, but with the bolt holding
the box to the engine frame it had never departed giving me an inflight issue.
It is also notable that the two orifices were not the same size even before the
collapse.
The only way I can see to equalise the two is to rebuild the airbox as per Dave
Ps suggestion - cut the ends off - find an aluminium tube with inside diameter
of 45mm and bond that in with bid. Anyone got any tube to that size?
Anyone else wishing to add any advice before I carve the boxes up. Also what is
the airbox made from? It looks like chopped strand mat fibreglass.
Regards
Steve
G-SMDH
> On 3 Sep 2020, at 15:45, david park <dpark748@me.com> wrote:
>
>
> When I had a airbox on initial build I bonded alloy tupe in to exits to
> strengthen
them.
>
> Dave Park
>
>
>> On 3 Sep 2020, at 15:37, Jeff B <topglock@cox.net> wrote:
>>
>>
>> Steve, you should be fine as long as the internal diameter of the tube is
>> equal
to or greater than the internal diameter of the carb opening.
>>
>> Jeff
>>
>> "I believe that forgiving them is God's function. Our job is to arrange the
meeting."
>>
>> -Gen. Norman Schwarzkopf
>>
>>> On 9/3/2020 8:40 AM, Steven Pitt wrote:
>>> I have had to repair my airbox as it split under the clamp.
>>> Can anyone tell me how critical the airflow into the carburettors via the
>>> box
is? Do I need to ensure a smooth and equal airflow?
>>> I suspect not as the quality of the airbox is somewhat rudimentary.
>>> For information I made up some bid' tube and epoxied it into the existing
>>> airflow
tube. I have tried to make the entrance a smooth as possible.
>>> Thank you.
>>> Steve Pitt
>>> G-SMDH
>>
>>
>>
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