Takeoffs

[Bruce Fenstermacher]

Bruce do you have that documented somewhere? The TCDS only refers to static RPM and the AFM only diameter and RPM for either model 170A or B.

The parts manual for either model lists the same (by part number) 2 (metal) props for land and 2 for seaplane models. There is a maximum cruise and maximum takeoff model for either land or seaplane. Again not pitch mentioned.

I don't know where it's documented but I think generally excepted that for a land plane a 51" prop is climb, 55" is cruise and of course 53" in the middle being standard.

TCDS
Propellers and Propeller Accessories
1. Propeller
(a) McCauley 1A170 33lb. (-39) (-39) (-39)
Static r.p.m. at max. permissible throttle setting:
Landplane: Not over 2330, not under 2230
Seaplane (Models 170A and 170B): Not
over 2525, not under 2300.
No additional tolerance permitted.

But of course we are off subject which hardly happens here.

[Bruce Fenstermacher]

This idea that you don't need a medical is fooling a lot of people right now in the LSA market. And after its better clarified the LSA market might just flounder. Its true you don't need a medical. But you have to be healthy enough to pass one. If there is anything wrong with you, that you couldn’t pass a medical and you know about it you can’t fly LSA. Lose your medical buy a LSA Wrong. Don’t renew your medical because you know you can’t pass one, Buy a LSA Wrong. The FAA is in the process of making this a lot clearer. At my IA seminar I ask them all right questions that others said they wouldn’t or didn’t want to know the answers to. This is going to be a lawyers field day. He was in poor health and slammed his LSA into….. Killing…. And he knew he had.... Lance

Lance I agree with you. Having lost my medical and now flying with a special issuance this subject is very close to my heart. (no pun intended)

If you let your medical expire and you don't believe anything to be wrong with you or you think you could have passed the class 3 physical then you can fly LSA with just your drivers license. If you don't think you can pass a class 3 physical then you probably can't legally fly LSA either.

[flyer170]

Bruce....I think that is what I had heard also. 7653 cruise, 7651 in between, 7649 climb/seaplane??
Bob
How do I do quotes??[/quote]

[Bruce Fenstermacher]

Bruce....I think that is what I had heard also. 7653 cruise, 7651 in between, 7649 climb/seaplane??
Bob
How do I do quotes??

Bob and all. See these instructions or quotes and styles I just wrote:
http://www.cessna170.org/phpBB2/viewtop ... 8365#38365

[bsdunek]

Bruce do you have that documented somewhere? The TCDS only refers to static RPM and the AFM only diameter and RPM for either model 170A or B.

The parts manual for either model lists the same (by part number) 2 (metal) props for land and 2 for seaplane models. There is a maximum cruise and maximum takeoff model for either land or seaplane. Again not pitch mentioned.

I don't know where it's documented but I think generally excepted that for a land plane a 51" prop is climb, 55" is cruise and of course 53" in the middle being standard.

TCDS
Propellers and Propeller Accessories
1. Propeller
(a) McCauley 1A170 33lb. (-39) (-39) (-39)
Static r.p.m. at max. permissible throttle setting:
Landplane: Not over 2330, not under 2230
Seaplane (Models 170A and 170B): Not
over 2525, not under 2300.
No additional tolerance permitted.

But of course we are off subject which hardly happens here.

Off Subjece? You're kidding!!!

I think the propeller specs. come in the parts book. I don't have mine right now because it's with my plane in Sturgis, MI being painted (the plane, not the parts book!). I'll look this up when I can.

[Bruce Fenstermacher]

But of course we are off subject which hardly happens here.

Off Subjece? You're kidding!!!

I think the propeller specs. come in the parts book. I don't have mine right now because it's with my plane in Sturgis, MI being painted (the plane, not the parts book!). I'll look this up when I can.

No they don't I looked. it just says max take off or max cruise. part numbers the same for A and B model land plane. Different parts for seaplane.

Actually the LSA discussion is a bit of topic. The discussion of props could be under "takeoff"

[dacker]

Weren't we talking about mmo?
David

[Bill Hart]

Weren't we talking about mmo?
David

I thought it was mogas.

[johneeb]

Weren't we talking about mmo?
David

MMO-Marvel Mystery Oil
or
MMO-Mach Maximum Operating (about .184 in a green 170 slightly higher in a red one)

[bsdunek]

No they don't I looked. it just says max take off or max cruise. part numbers the same for A and B model land plane. Different parts for seaplane.

Actually the LSA discussion is a bit of topic. The discussion of props could be under "takeoff"

You're right - the 170A & B parts book only list Cessna part numbers. Interesting - the 170B book lists four props; Climb & Cruise and Seaplane Climb & Cruise.
The '48 170 parts book lists two: Cruise Prop - DM7653, Take-Off Prop - DM7651, so there is documentation on those two for 1948.
I got these from a source that has been mentioned on this forum before: http://www.micro-tools.com/pdf/cessna
It's neat because I can look at parts at work and the boss thinks I'm working! I don't know why Micro-Tools has this, and it's not listed on their consumer site. I have gotten parts and tools for camera repair and maintaince for years.

[KMac]

Robert,
Hopefully this link works. I have been thinking about the California or Jet flow prop also. Anyone know any more about them? It doesn't seem correct that they can get 2700 rpm on take-off and improve the cruise also.
Kevin
http://cessna170.org/phpBB2/viewtopic.p ... ornia+prop

[Robert Eilers]

My son is due back from his latest deployment this week - so, I will have an excuse to fly to San Diego. I will stop in at Hemet and talk to Aero Propeller about the "Jet Flow" mod. I'll let you know what I find out. I am getting serious about having the mod done. I love the 170, but would like a little more HP on takeoff and climb.

[hilltop170]

Robert-
Ask them if the mod is for the 6-bolt as well as the 8-bolt props.

[lowNslow]

You're right - the 170A & B parts book only list Cessna part numbers. Interesting - the 170B book lists four props; Climb & Cruise and Seaplane Climb & Cruise.
The '48 170 parts book lists two: Cruise Prop - DM7653, Take-Off Prop - DM7651, so there is documentation on those two for 1948.

These old airplanes have info scattered all over. The owners manual has lots of maintenance info as well, not on props, but if its something you can't find don't forget to check the owners manual.

[Watkinsnv]

Sport Pilot Medical Certification-Frequently Asked Questions
If I suspect I have a significant medical condition, but have never had an FAA medical certificate denied, suspended, or revoked, can I exercise sport pilot privileges using my current and valid driver’s license, if otherwise qualified?

Response by the Federal Air Surgeon
Long-standing FAA regulation, § 61.53, prohibits all pilots--those who are required to hold airman medical certificates and those who are not--from exercising privileges during periods of medical deficiency. The FAA revised § 61.53 to include under this prohibition sport pilots who use a current and valid U.S. driver’s license as medical qualification. The prohibition is also added under §§ 61.23 (c) (2) (iv) and 61.303 (b) (2) (4) for sport pilot operations.

You should consult your private physician to determine whether you have a medical deficiency that would interfere with the safe performance of sport piloting duties. Lance