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Author Topic: OS LA 25 Venturi  (Read 822 times)

Offline Motorman

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OS LA 25 Venturi
« on: June 16, 2020, 10:59:40 AM »
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« Last Edit: August 21, 2021, 05:15:49 PM by Motorman »
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Offline Dane Martin

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Re: OS LA 25 Venturi
« Reply #1 on: June 16, 2020, 12:48:21 PM »
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Offline Brett Buck

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Re: OS LA 25 Venturi
« Reply #2 on: June 16, 2020, 12:51:02 PM »
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Offline Dane Martin

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Re: OS LA 25 Venturi
« Reply #3 on: June 17, 2020, 04:18:32 PM »
Towers description is 7mm ID. But they say 6mm on the small...
I believe I used a letter I drill, which is .272. But if it is 7mm, that .276
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Offline Brett Buck

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Re: OS LA 25 Venturi
« Reply #4 on: June 17, 2020, 06:35:00 PM »
Quote from: Motorman on June 16, 2020, 04:17:28 PM
I've got one that measures .260" so I guess that's it. What's the larger one 7mm?

 The LA only comes with one venturi, it's the same nominal 6.5mm as on the 20/25FP. All that I have measured are 6.52 mm/.257 to three significant figures, using a Starrett small hole gauge set and a micrometer. None of them are *exactly* round, either but thats in the noise for any practical purpose.

  Brett
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Offline Dane Martin

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Re: OS LA 25 Venturi
« Reply #5 on: June 17, 2020, 06:57:29 PM »
Quote from: Brett Buck on June 17, 2020, 06:35:00 PM
The LA only comes with one venturi, it's the same nominal 6.5mm as on the 20/25FP. All that I have measured are 6.52 mm/.257 to three significant figures, using a Starrett small hole gauge set and a micrometer. None of them are *exactly* round, either but thats in the noise for any practical purpose.

  Brett

Ah! You're correct. I forgot about that. The FP had a large and a small. Well, I guess the 35fp had a medium. But the LA is the 6.5 regardless of the size.
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Offline Dane Martin

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Re: OS LA 25 Venturi
« Reply #6 on: June 19, 2020, 08:44:27 AM »
Quote from: Motorman on June 19, 2020, 07:19:54 AM
I must have polished/modified mine to be ,003 bigger therefore ruined it lol.


Motorman 8)

Throw it out. Or throw it in an envelope addressed to me, so I can throw it out for you...
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Offline Brett Buck

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Re: OS LA 25 Venturi
« Reply #7 on: June 19, 2020, 09:52:16 AM »
Quote from: Motorman on June 19, 2020, 07:19:54 AM
I must have polished/modified mine to be ,003 bigger therefore ruined it lol.

     This is the scintillating wit we have come to expect.

     Actually, if you made it .003 bigger, you *would* have problems in some cases. I have seen people pick up 25-30 points *in one flight* changing their venturi by .005.

     But I am sure *you* know better...

    Brett
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