Correct angle for pitot tube?

How to keep the Cessna 170 flying and airworthy.

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Fearless Tower
Posts: 248
Joined: Tue Feb 15, 2011 7:01 pm

Correct angle for pitot tube?

Post by Fearless Tower »

Is there a reference for the pitot tube angle?

Looks like the paint shop bent the tubing on mine (It points more toward the sky than forward) and consequently, the ASI is a bit erratic at slow speeds/high angles of attack.
Andrew Hochhaus
N3996V - 1948 170
indyav8n
Posts: 43
Joined: Fri Jun 04, 2010 2:51 pm

Re: Correct angle for pitot tube?

Post by indyav8n »

Fearless,
On page 16-9, figure 16-3 of the 100 series service manual you can find a template for the pitot tube contour.
Although it refers to the 172-175 models, it works well for the 170 also, I found it useful on my plane. Pm me your email and I can send you a copy if you need.
Wes
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Bruce Fenstermacher
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Re: Correct angle for pitot tube?

Post by Bruce Fenstermacher »

This template is for a 172/175 and is out ot the Cessna Service Manual '62 and Prior which of course is the same wing profile as a 170A and B. I think it's the best you'll do for a '48 which is not the same wing profile but I think you can swag it.

Make sure you print the PDF with no reduction or enlargement
170 Pitot template072.pdf
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Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Fearless Tower
Posts: 248
Joined: Tue Feb 15, 2011 7:01 pm

Re: Correct angle for pitot tube?

Post by Fearless Tower »

Wow.....mine has AT LEAST 30 degrees more bend to it than that template!
Andrew Hochhaus
N3996V - 1948 170
hilltop170
Posts: 3481
Joined: Sat May 06, 2006 6:05 pm

Re: Correct angle for pitot tube?

Post by hilltop170 »

I bend mine down just enough so that water will not collect in it when the plane is on the ground.
Richard Pulley
2014-2016 TIC170A Past President
1951 170A, N1715D, s/n 20158, O-300D
Owned from 1973 to 1984.
Bought again in 2006 after 22 years.
It's not for sale!
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170C
Posts: 3182
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Re: Correct angle for pitot tube?

Post by 170C »

Thanks for the template.
OLE POKEY
170C
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2012-2018
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