[Healeys] 100 Draft tube

[Roger Grace]

Yes, this is how I vent my BJ8.
Never thought of using a fan to test it ... good idea MS !
rg


On Thu, Apr 29, 2021 at 7:09 AM Michael Salter via Healeys <
healeys at autox.team.net> wrote:

> Bernoulli would have been proud of you. 👍👍
>
> M
>
> On Thu., Apr. 29, 2021, 9:05 a.m. healeyguy--- via Healeys, <
> healeys at autox.team.net> wrote:
>
>> Listers
>> I attempted to add a 7 second video of a demonstration of how a draft
>> tube works but it was rejected on the list.  Probably file size.  Anyway
>> wanted to show the effectiveness of a draft tube in operation.
>> Had my shop fan blowing parallel with the floor (car in motion), a empty
>> paper towel tube and a strip of Kleenex tissue.  Cut one end of the tube at
>> an angle, about 30 degrees. Held the tissue paper over the upper square end
>> of the tube and slowly lowered the angle cut end vertically  into the fan
>> wash, Only had to lower the tube less that 2 inches  and the tissue was
>> sucked down the tube.  The engineers way back when knew what they were
>> doing with regard to ventilating the engine in a very simple but not very
>> environmental way.
>> As Mr Dylan once said. "Ah, but I was so much older then, I'm younger
>> than that now..."  :)
>> P
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