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170B vs. 172 Nose Bowl?

Posted: Wed Mar 17, 2021 5:29 pm
by rnealon1
Is the 2 part nose bowl on my '54 170B the same as the early 172?

I tried to search 172 IPC; it looked like the upper part had the same part number but not the lower.

Thanks,

Bob

Re: 170B vs. 172 Nose Bowl?

Posted: Thu Mar 18, 2021 12:24 am
by mit
Did you have the Vac pump at one time?

Re: 170B vs. 172 Nose Bowl?

Posted: Thu Mar 18, 2021 12:42 am
by rnealon1
No I don't think so.

Re: 170B vs. 172 Nose Bowl?

Posted: Thu Mar 18, 2021 12:52 am
by mit
That STC used 172 nose.

Re: 170B vs. 172 Nose Bowl?

Posted: Thu Mar 18, 2021 6:38 am
by pdb
3473FB7C-E334-4356-9A14-ED5CEE256AFA.jpeg
I have a 172 cowl (I think 1959.) You can see its different from the 170 and mine appears to be of heavier gauge metal.

Re: 170B vs. 172 Nose Bowl?

Posted: Thu Mar 18, 2021 10:39 am
by GAHorn
rnealon1 wrote:Is the 2 part nose bowl on my '54 170B the same as the early 172?

I tried to search 172 IPC; it looked like the upper part had the same part number but not the lower.

Thanks,

Bob
Bob, the first 9000 C-172s used the same upper and lower nose cowls as the last 170Bs. The difficulty may lie in the last 170B lower nose cowls..which underwent a PN change... but their appearance is the same. I do not know the difference between the 0552002-51 which began with the ‘53 year-model (lower nose cowl SN: 25373 thru 26995) and the later 0595000-6 used on SN: 26996 and on thru the early 172 series. (until about the 1960 intro I believe, IIRC)

The same upper nose cowl PN 0595000-6 was used on the ‘53 170B thru the early 172 series.

Re: 170B vs. 172 Nose Bowl?

Posted: Thu Mar 18, 2021 12:07 pm
by rnealon1
Thanks for the information. My serial number is 26181, so I fall into the earlier (of the later?) 170B lower cowling.

Like many if not most of these there are a number of repairs on my cowling, mostly the lower, so just trying to think outside the box for replacement prior to painting.

Thanks,

Bob

Re: 170B vs. 172 Nose Bowl?

Posted: Thu Mar 18, 2021 2:02 pm
by GAHorn
Wire-mesh reinforcement embedded with JB Weld has been performed successfully to some of these cowls.

Re: 170B vs. 172 Nose Bowl?

Posted: Thu Mar 18, 2021 4:06 pm
by rnealon1
GAHorn wrote:Wire-mesh reinforcement embedded with JB Weld has been performed successfully to some of these cowls.
Thanks George, it certainly would be nice to maintain the original cowling, will have to look into someone who can do this (it sure won't be me).

Also based on the cost of a paint job, it is not going to happen in the immediate future.

Bob

Re: 170B vs. 172 Nose Bowl?

Posted: Fri Mar 19, 2021 1:24 am
by c170b53
Would you consider going fibreglass ? I believe this is availablehttps://www.knots2u.net/fiberglass-repl ... 552002-51/.

Re: 170B vs. 172 Nose Bowl?

Posted: Fri Mar 19, 2021 2:38 am
by daedaluscan
GAHorn wrote:Wire-mesh reinforcement embedded with JB Weld has been performed successfully to some of these cowls.
Honestly that sounds really cheesy. How about excellent sheet metal work?

Re: 170B vs. 172 Nose Bowl?

Posted: Fri Mar 19, 2021 9:44 am
by GAHorn
daedaluscan wrote: Honestly that sounds really cheesy. How about excellent sheet metal work?
A wire/mesh/epoxy repair is strong, undetectable without removing the cowl, and often can be returned to service without requiring extensive paint. “Excellent sheet metal work” is expensive and rare on cowl nose bowls and demands re-paint.

Would it be any more “cheesy” to have it made completely out of composites? The Knots-2U product looks very nice to my eye.
What looks “cheesy” to me is a bunch of cracks, stop-drill-holes, and patches.
.

Re: 170B vs. 172 Nose Bowl?

Posted: Fri Mar 19, 2021 2:52 pm
by c170b53
Wonder how they made the part at Cessna, was made hydro forming or a stamp ? I know where a large hydro form rests originally used by Edo
humm.

Re: 170B vs. 172 Nose Bowl?

Posted: Sun Mar 21, 2021 11:13 pm
by mschlender
I have a NOS lower

Re: 170B vs. 172 Nose Bowl?

Posted: Mon Mar 22, 2021 7:53 pm
by rnealon1
I sent you a Private Message, thank you.