Tach cable and tach failure

How to keep the Cessna 170 flying and airworthy.

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hilltop170
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Joined: Sat May 06, 2006 6:05 pm

Post by hilltop170 »

Awh, heck! I thought I had it cinched. You're just like my math teacher, you want an exact answer. I kept telling her I was in engineering, and you can't get closer than three significant figures with a slide rule. And the engineering profs were happy if you just derived the equation. Now I'm gonna have to get out my engine overhaul manual and try to figure it out.

Thanks for the compliment on my 170's condition, it's hard to think about changing it after 39 years since the last paint job and interior. I bet some of the other guys feel the same way. Who's in charge of new catagories anyway?
Richard Pulley
2014-2016 TIC170A Past President
1951 170A, N1715D, s/n 20158, O-300D
2023 Best Original 170A at Sault Ste. Marie
Owned from 1973 to 1984.
Bought again in 2006 after 22 years.
It's not for sale!
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cessna170bdriver
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Joined: Mon Apr 22, 2002 5:13 pm

Post by cessna170bdriver »

N9149A wrote: For example for bonus points when your tach is reading 2400 RPM what RPM is the tach cable spinning?
On the C-145/O-300 series the tach cable would run at 1200, same speed as the camshaft. How many points do I get, and how many will it take to get a cup of coffee? :wink:

Miles
Miles

“I envy no man that knows more than myself, but pity them that know less.”
— Thomas Browne
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Bruce Fenstermacher
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Post by Bruce Fenstermacher »

Ding Ding Ding we have a winner.

Miles I had a feeling you would come through with the answer.

If you have a $1 and this knowledge you may get a cup of coffee in some places. 8)

As for points, as head judge at the upcoming convention you can give yourself as many points as you dare in that new "Rat" 170 category we're going to explore. :evil:
CAUTION - My forum posts may be worth what you paid for them!

Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
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MoonlightVFR
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Tach Thread

Post by MoonlightVFR »

I like this post about theTach and the various experiences.

Had a tach problem and the A&P replaced it with a new one.

I took a long trip (STL MO TO NYC , Stewart INTL and RETURN)

I told the mechanic put my old tach back in and you keep the money and the new tach. I'm not flying behind that thing. Period. My old tach just squealed ocasionally but it settled down into some thing believable.


The NEW tach was mfg in CHINA!


Regards
gradyb, '54 B N2890C
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GAHorn
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Post by GAHorn »

Good response! What brand was it?
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons. ;)
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