banner graphic
Airport Webcams
Who's Online
29 registered (patyancey, Birdman, Luvrv8, skyhawk3, Pilawt, dashnamp, Shuswap, lantajohn, Don Tedrow, BSNorris, farnk, Desert Hawk, Joeman434, RDB847, laplander0, Pilot110, multisync, CaptNemo, cyendrey, mike smith, jaanderson, Bob2, TxHawk, Ward Holbrook, Pdw431, randyb99, TexasAviator, Daniel Barbee, pete480), 129 Guests and 7 Spiders online.
Key: Admin, Global Mod, Mod
Newest Members
tootTOOT, fpawul, karen, rhark25, Frang
6413 Registered Users
Top Posters
Bargain Bob 97771
Cessna Dude 6628
vettdvr 5631
Rusty Rudder 5043
California Flyer 4767
Clyde Cessna 3314
wrecksum 2704
Willie 2653
Ward Holbrook 2173
XP Driver 2120
Don Tedrow 2009
Nightowl 1826
ytodd 1824
RodneyHooverCFI 1642
oilwell1415 1633
Nintendo Pilot 1632
Lee T. Hargic 1630
Glenn Darr 1624
November X-ray 1589
Bigdoggh 1440
Pilawt 1396
Peedie Montgomery 1281
Jim_1 1217
EdW 1190
Propduster 1063
Showboatsix 1018
Awkward Bird 1015
Shuswap 956
OldCrow 881
Renegade 9 877
Top Posters (30 Days)
Bargain Bob 3628
Joeman434 176
vettdvr 146
Willie 51
Rusty Rudder 42
Ward Holbrook 40
Wayne R 40
Luvrv8 38
Peedie Montgomery 37
oilwell1415 31
California Flyer 24
JD Casteel 24
Shuswap 23
N5479R 21
Pilot110 20
Showboatsix 19
Teg916 19
Desert Hawk 18
Mark Y. 18
Kinhop 18
Rikochet 18
Don Tedrow 17
farnk 17
cadcap 16
Dave W 16
Tom Downey 16
BNB-SP 14
Birdman 14
IN2FLYING 13
Glenn Darr 13
Topic Options
#88185 - 08/07/12 05:48 PM 172N with 180HP conversion = FUN
Awkward Bird Offline
Gold Pilot

Registered: 11/20/11
Posts: 1015
Loc: Boulder Creek, CA
Our club has a new plane that I got to fly yesterday evening. Its an 1978 172N with a 180HP engine in it. That plane can REALLY climb and cruise! especially compared with the other 172s I fly at the club. It even out climbed the SP I'm used to flying. It was very nose heavy during landing compared to what I am used to, but it was a blast to fly.

A little side question. I noticed this 172N has 30 degrees of flaps. I'm used to 40 degrees of flaps on 172Ns. Are there different flap options for different model years of 172Ns? Just curious.
_________________________
"I fly because I wouldn't want to do anything else." ~ A. Cluff
Musing and misadventures - http://imanawkwardbird.blogspot.com/

Top
#88188 - 08/07/12 06:07 PM Re: 172N with 180HP conversion = FUN [Re: Awkward Bird]
Pilawt Online   content
Club Sponsor
Gold Pilot

Registered: 02/13/10
Posts: 1396
Loc: Vancouver, WA
All 172Ns came from the factory with 40 degrees of flap.

If the 180 hp conversion on the one you flew was done with the Air Plains STC, there are actually two different STCs for the 172N.

The first is the conversion to the 180-hp O-360 engine. That STC alone makes no changes to the airframe aft of the firewall, and does not change the gross weight from the original 2300 pounds. Thus the useful load is reduced by the added weight of the engine.

A second STC provides for installation of a physical limitation in the flap mechanism (photo below) to prevent extension greater than thirty degrees. When that is done, gross weight of the 180 hp 172N is increased by 250 lb, to 2550 lb. Reason being, the airplane would not be able to meet FAA climb guidelines for balked landing with full 40 degrees of flap at the heavier weight.

My '78 172N happens to be one of the very few with the 180 hp engine and 40 degrees of flap. It was my dad's airplane before he passed away, and when he did the 180 hp conversion in 1997 he bought both of the STCs but never had the flap limit installed. So it still has the 2300 lb gross weight. That doesn't bother me much, because I like flying into short fields, and I have no friends. grin

I have the parts for the flap limit, and can have it done any time. But for now I like it the way it is.



The 1981-86 Model 172P, the 172Q, 172RG, and all "restart-era" 172s are limited to 30 degrees of flap from the factory, as well. The flap limit in the 172P allowed the gross weight to be increased to 2400 lb without an increase in power.
_________________________
Jeff Jacobs
C-172N-180
KVUO / Vancouver, WA


Top
#88189 - 08/07/12 06:14 PM Re: 172N with 180HP conversion = FUN [Re: Pilawt]
Awkward Bird Offline
Gold Pilot

Registered: 11/20/11
Posts: 1015
Loc: Boulder Creek, CA
Thanks for the quick info Pilawt! I had a feeling someone here would know smile
_________________________
"I fly because I wouldn't want to do anything else." ~ A. Cluff
Musing and misadventures - http://imanawkwardbird.blogspot.com/

Top
#88190 - 08/07/12 06:37 PM Re: 172N with 180HP conversion = FUN [Re: Awkward Bird]
Rusty Rudder Offline
Diamond Pilot

Registered: 02/26/10
Posts: 5043
Loc: NorthEast
Very interesting, I would have rather had the 40 degrees than the paper that says 2550 on it... (I've got the 172 w/180 Penn Yann)

Good accurate info pw, thanx!
_________________________
Take-off's are optional, landings are manditory



Top
#88196 - 08/07/12 07:30 PM Re: 172N with 180HP conversion = FUN [Re: Rusty Rudder]
Nintendo Pilot Offline
Gold Pilot

Registered: 05/22/11
Posts: 1632
Loc: Utah
That 180 HP engine is nice isn't it AB?
_________________________
1979 Cessna 172N (N9478E) w/180 hp conversion by Air Plains
Alan C.
PP-ASEL

Blog http://ontarget-spionen.blogspot.com/
Youtube Channel http://www.youtube.com/user/spionen007?feature=mhee

Top
#88255 - 08/08/12 01:55 AM Re: 172N with 180HP conversion = FUN [Re: Nintendo Pilot]
Nightowl Offline
Club Sponsor/Speed Demon
Gold Pilot

Registered: 02/14/10
Posts: 1826
Loc: Northwest lower Michigan
Our 172N has the 180 hp AirPlains conversion with the STC to increase max gross weight to 2550 lbs (restricting max flap extension to 30 degrees and beefing up tires to six-ply). It really does climb like a homesick angel, and we have flown often with four adults on board, so am very happy with the gross weight increase. I usually land with 20 degrees of flap or less and rarely use 30, so 40 would be overkill for our usual needs (our three previous Cessnas all had the 40 degree flaps, so definitely have used them in the past).

Another advantage is that our STC includes a change to the flap extension speed, allowing 10 degrees of flap at 110 kts, with any further flap deployment kept to 85 kts or less (just as the 172Q POH specifies). Dropping 10 degrees at 110 kts gets us down to 85 kts quite nicely, so this has proven to be very beneficial, especially on instrument approaches.

And yes, I've flown the 172P, R, and SP, and our airplane, being lighter, does outclimb them all. And it also can carry more passenger payload than our CAP 182T when fueled for a similar mission.

The 180 hp engine is what should have been in the 172 all along.

John
_________________________
CP-ASEL-IA
'77 C172N, AirPlains 180 hp conversion

Our sigmap has been flown entirely using aircraft with capabilities at or below those of the C-172.


Top
#88303 - 08/08/12 01:25 PM Re: 172N with 180HP conversion = FUN [Re: Nightowl]
Pilawt Online   content
Club Sponsor
Gold Pilot

Registered: 02/13/10
Posts: 1396
Loc: Vancouver, WA
One important benefit to the more powerful engine is that it allows one to maintain a higher airspeed while climbing, helping the engine to stay cool during a long climb on a hot day.
_________________________
Jeff Jacobs
C-172N-180
KVUO / Vancouver, WA


Top


Moderator:  Ward Holbrook 
Cessna172 Tribute
THIS MONTH'S SPONSOR
Special thanks to:
You!
Thank you for making this site great
Strother '15 Countdown
June 18-21, 2015 KWLD
Today's Birthdays
Flyin Phil, JSpang, Randy Crosby, vettdvr
Member Map
Where in the world are the Cessna 172 Club Members?

View the map

Helpful Links
100LL Price Finder
AD Directory
Aging GA Aircraft
Aircraft Directory
Airplane Report
AirNav
Airport Facilities Directory
AOPA
Aviation Weather
Barnstormers
BaseOps
C172 History
Cessna
Controller
Crash Records
DUAT Voyager Planner
DUATS
FAA
FltPlan
Flight Aware
Flying Tools (Files)
Google Earth
Ground Speed Records
National METAR Map
Sky Vector
Trade-A-Plane
Uvalde Flight Ctr
All the Webcams
Shout Box

AOPA
AOPA
Weather Lookup
Airport code:
(separate multiple codes with spaces)

List of stations