Jim Shoe
Amelia, OH
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Joined: 02/06/2004
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Good Sam RV Club Member
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DKean,
If you really want to satisfy your curiosity or really need one, you can pick up a copy of the original owner's handbook from Sporty's Pilot Shop for $25. Here's the link. Their store is 2 miles from my house. Most all pilots buy their VFR sectional charts from them. They're located at Clermont County Airport in Batavia, OH.
Retired and visiting as much of this beautiful country as I can.
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Cloud Dancer
San Antonio and Livingston TX USA
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Joined: 06/08/2001
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My wife's PA-28R had a book top speed of 177kts, and a cruise of 172kts. But, all the same I flight planned for 155kts.
Willie & Betty Sue
Miko & Sparky
2003 41 ft Dutch Star Diesel Pusher/Spartan
Floorplan 4010
Blazer toad & Ranger bassboat
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msmith1199
Central, CA
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Joined: 10/07/2001
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nickthehunter wrote:120/125 if headed into the wind, 130/135 with a tailwind.
Actually when they say cruise speed they are talking air speed not ground speed. Cruise speed through the air won't fluctuate much whether you have a tail wind or head wind.
2004 National Tropi-Cal T-350, Class A, Triple slide, 330 HP Cat DP.
2006 Dodge Dakota 4x4 or
2002 Harley FLSTF Fat Boy on a Trailer or
2004 Polaris Quad on the Trailer
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wilber1
Abbotsford B.C. Canada
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Joined: 12/16/2002
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msmith1199 wrote:nickthehunter wrote:120/125 if headed into the wind, 130/135 with a tailwind.
Actually when they say cruise speed they are talking air speed not ground speed. Cruise speed through the air won't fluctuate much whether you have a tail wind or head wind.
And that would be true airspeed, not indicated airspeed. In zero wind, true airspeed will equal ground speed.
"Never trust a man who has not a single redeeming vice" WSC
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Doug4.7
Hartselle, AL, USA
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Joined: 10/02/2003
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wa8yxm wrote:JATO = Jet Assisted Take Off
There is an urban myth about some idiot who straped a couple of JATO packs onto his chevy to see how fact it would go and ... Well when he got to the curve he took off, sailed through the air and smacked into a mountain.. No truth to it as far as several different expert researchers can find... But hey. good story and you know.. it sounds like a "Hold my beer and WATCH THIS!" kind of story. Here is a great story about how it "really" happened. I do not vouch for the truth of the story, but it is a good story and all the parts fit.
Heard About The Rocket Car?
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nickthehunter
Southgate, MI
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Joined: 07/18/2005
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msmith1199 wrote:nickthehunter wrote:120/125 if headed into the wind, 130/135 with a tailwind.
Actually when they say cruise speed they are talking air speed not ground speed. Cruise speed through the air won't fluctuate much whether you have a tail wind or head wind.
Actually, my comment was meant "Tongue-In-Chek" but apparently some people took it more literally. I should have known better!
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msmith1199
Central, CA
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Joined: 10/07/2001
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Sorry, it looked literal.
* This post was
edited 12/07/11 08:08am by an administrator/moderator *
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PA12DRVR
Anchorage, AK
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Joined: 09/17/2003
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As the proud owner of a (now thrice) restored/rebuilt PA-12 (a tube-and-rag vs. aluminum) plane, a few thoughts....I agree the lower speed is more likely than the book speed
- While I'm not familiar with the available engine mods for the Cherokee, on many Pipers, STC's are available for bigger engines
- Engine accessories (carbs, magnetos, etc) wear just as does the iron on an engine and even a small dip in performance of the accessories can impact the overall power output of the engine
- Older a/c pick up an amazing amount of "invisible" weight due to dirt, moisture, pebbles, pencils, lost shotgun shells, etc; this weight will impact flying speed
- "modern" instrument panels are more cluttered and therefore heavier than original factory panels. On mine, although no one instrument is very large, I have a GPS, xponder, comm, VSI, intercom, and variety of instrument/external light controls that were not on the original. I'd guess that my panel weighs maybe 50#'s more than did the original.
I'm still tweaking my -12 after the rebuild and have about determined that either the tubing going too the airspeed indicator or the airspeed indicator itself is messed up: done enough flying to believe that (even in still air) the airspeed indicator is about 10 - 12 mph below the GPS. Fortunately, (it's a -12 after all!), I've had enough time now to know when it will start flying as well as stop flying....both well short of when the airspeed indicator comes alive.
Finally, I'm not sure, but I believe that the published cruise speed was primarily designed/driven by the manufacturer while the "maximum" speed was based (at least) on the FAA's concurrence with teh manufacturer's engineering review of the speed at which damage might occur (plus a safety margin).
CRL
Displaced Alaskan NO MORE!
My RV is a 1946 PA-12
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