The bellmouths were just another "looks right to me"  part.   Turned with a hand held tool on a lathe (plywood) then covered with epoxy resin.

Tracy

Sent from my iPad

On Jan 19, 2013, at 5:18 PM, Charlie England <ceengland7@gmail.com> wrote:

> Thanks. I was hoping for 1/2". :-)
>
> Did you just use a constant radius lip, or go whole-hog with an eliptical?
>
> On 1/19/13, Tracy <rwstracy@gmail.com> wrote:
>> Pretty close.  Think I ended up with between 5/8" to 3/4" clearance.   I did
>> some pressure drop studies using a vacuum cleaner and was amazed at how
>> close you could get it without any apparent restriction.
>>
>> Tracy
>>
>> Sent from my iPad
>>
>> On Jan 19, 2013, at 2:00 PM, Charlie England <ceengland7@gmail.com> wrote:
>>
>>> Hi Tracy,
>>>
>>> How close are your bellmouths to the outside wall of your 'shoebox' on
>>> your Renesis? I'm trying for the longest runners that will fit in the box
>>> (constrained by the cowl, of course).
>>>
>>> Thanks,
>>>
>>> Charlie
>>>
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>>
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> <velocitystacks.jpg>
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