Matronics Email Lists :: View topic - Wow, what a difference!

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Wow, what a difference!

Matronics Email Lists Forum Index -> TeamGrumman-List

View previous topic :: View next topic

Author Message

quinn_tom(at)tqiinc.com
Guest

Posted: Mon Jan 10, 2011 4:25 pm Post subject: Wow, what a difference!

Just got my plane back from annual with a Sensenich prop replacing the stock

McCauley prop on my 1977 Tiger, now the airplane climbs like a bat out of

hell (over 1500 fpm on -300 alt press day) and I saw 132 knots GS at 2,000

(2,650 rpm) feet on a calm day. Can't wait to get it to altitude. Wish I had

done this much earlier.



Tom Quinn 249RR

teamgrumman(at)yahoo.com
Guest

Posted: Mon Jan 10, 2011 10:09 pm Post subject: Wow, what a difference!

What pitch did you get?



Sent from my iPad



On Jan 10, 2011, at 4:17 PM, "Tom Quinn" <quinn_tom(at)tqiinc.com> wrote:



 	  Quote: 	
		   

 

 Just got my plane back from annual with a Sensenich prop replacing the stock

 McCauley prop on my 1977 Tiger, now the airplane climbs like a bat out of

 hell (over 1500 fpm on -300 alt press day) and I saw 132 knots GS at 2,000

 (2,650 rpm) feet on a calm day. Can't wait to get it to altitude. Wish I had

 done this much earlier.

 

 Tom Quinn 249RR

quinn_tom(at)tqiinc.com
Guest

Posted: Tue Jan 11, 2011 2:13 am Post subject: Wow, what a difference!

62" pitch



Tom Quinn

249RR



--

flyv35b(at)minetfiber.com
Guest

Posted: Tue Jan 11, 2011 5:24 am Post subject: Wow, what a difference!

That's what Fletchair recommends most of the time.  But it's not enough 

pitch for a clean airframe and a strong engine, especially if you put a PF 

exhaust on it.



Cliff

---

quinn_tom(at)tqiinc.com
Guest

Posted: Tue Jan 11, 2011 6:04 am Post subject: Wow, what a difference!

Cliff,

        I spoke with Garner before buying the prop and I didn't have plans

of buying the PF system in the near future. If I hang onto the airplane for

a while I may install the PF system and I'm guessing the prop can be

re-pitched? I'm still amazed how much of a difference the new prop makes.

Not only is the performance so much better but the engine runs much

smoother, I can see why there was an RPM limitation on the McCauley prop. My

wife is avoiding me now because I keep on telling her how great the

performance is every time I see her.



Tom Quinn

249RR

--

flyv35b(at)minetfiber.com
Guest

Posted: Tue Jan 11, 2011 6:25 am Post subject: Wow, what a difference!

Yes, you can repitch the prop.  And you may want to do that if you 

eventually install the PF exhaust as it will add about 80 rpm to your full 

throttle engine rpm.  If that turns out to be 2900 rpm or thereabouts then 

you might want more pitch.  You have to do some testing to determine where 

you are though.



And yes, the McCauley does have a resonant vibration in the yellow arc area 

that is greater than with the Sensenich.



Cliff

---

flyv35b(at)minetfiber.com
Guest

Posted: Tue Jan 11, 2011 6:39 am Post subject: Wow, what a difference!

I might also add that full throttle rpm decreases with altitude, probably 

about 100 rpm from sea level to 10,000 ft.  So if you can turn 2800 rpm down 

low then at 10,000 ft or higher you will max out at about 2700 rpm, which 

will be optimum for maximum legal cruise speed.



Cliff

---

bob.hodo(at)yahoo.com
Guest

Posted: Tue Jan 11, 2011 6:46 am Post subject: Wow, what a difference!

 	  Quote: 	
		  >>My wife is avoiding me now because I keep on telling her how great the

 performance is every time I see her.<<<
	


 

 I know what you mean! You can tell us, 'cause we know exactly how great that feels.

 

 Bob Hodo

 GADsden, AL

               [quote][b]

teamgrumman(at)yahoo.com
Guest

Posted: Tue Jan 11, 2011 11:09 am Post subject: Wow, what a difference!

the rpm range where the restriction was on the McCauley prop is still a range to be cautious of with the Sensenich.  The Sensenich prop is not as susceptible to the harmonics at that rpm, but the problem is still there.  

From: Tom Quinn <quinn_tom(at)tqiinc.com>

To: teamgrumman-list(at)matronics.com

Sent: Tue, January 11, 2011 6:01:05 AM

Subject: RE: Wow, what a difference!

  --> TeamGrumman-List message posted by: "Tom Quinn" <quinn_tom(at)tqiinc.com (quinn_tom(at)tqiinc.com)>

Cliff,

        I spoke with Garner before buying the prop and I didn't have plans

of buying the PF system in the near future. If I hang onto the airplane for

a while I may install the PF system and I'm guessing the prop can be

re-pitched? I'm still amazed how much of a difference the new prop makes.

Not only is the performance so much better but the engine runs much

smoother, I can see why there was an RPM limitation on the McCauley prop. My

wife is avoiding me now because I keep on telling her how great the

performance is every time I see her.

Tom Quinn

249RR

--

teamgrumman(at)yahoo.com
Guest

Posted: Tue Jan 11, 2011 11:11 am Post subject: Wow, what a difference!

the Power Flow on my plane gave me 80 rpm at 17,000 feet.  I was still turning 2675.

From: flyv35b <flyv35b(at)minetfiber.com>

To: teamgrumman-list(at)matronics.com

Sent: Tue, January 11, 2011 6:19:52 AM

Subject: Re: Wow, what a difference!

 --> TeamGrumman-List message posted by: "flyv35b" <flyv35b(at)minetfiber.com (flyv35b(at)minetfiber.com)>

Yes, you can repitch the prop.  And you may want to do that if you 

eventually install the PF exhaust as it will add about 80 rpm to your full 

throttle engine rpm.  If that turns out to be 2900 rpm or thereabouts then 

you might want more pitch.  You have to do some testing to determine where 

you are though.

And yes, the McCauley does have a resonant vibration in the yellow arc area 

that is greater than with the Sensenich.

Cliff

---

quinn_tom(at)tqiinc.com
Guest

Posted: Tue Jan 11, 2011 11:41 am Post subject: Wow, what a difference!

That highest I’ve had my Tiger is 10,000, I could have gone higher I guess at about 200fpm (summer time). What was the highest altitude you were capable of before installing the PF system?  

     

Tom Quinn  

  

249RR  

       

From: owner-teamgrumman-list-server(at)matronics.com [mailto:owner-teamgrumman-list-server(at)matronics.com] On Behalf Of Gary Vogt

 Sent: Tuesday, January 11, 2011 2:09 PM

 To: teamgrumman-list(at)matronics.com

 Subject: Re: Wow, what a difference!  

  

  

       

the Power Flow on my plane gave me 80 rpm at 17,000 feet.  I was still turning 2675.  

    

         

  

From: flyv35b <flyv35b(at)minetfiber.com>

 To: teamgrumman-list(at)matronics.com

 Sent: Tue, January 11, 2011 6:19:52 AM

 Subject: Re: Wow, what a difference!

 

 --> TeamGrumman-List message posted by: "flyv35b" <flyv35b(at)minetfiber.com (flyv35b(at)minetfiber.com)>

 

 Yes, you can repitch the prop.  And you may want to do that if you 

 eventually install the PF exhaust as it will add about 80 rpm to your full 

 throttle engine rpm.  If that turns out to be 2900 rpm or thereabouts then 

 you might want more pitch.  You have to do some testing to determine where 

 you are though.

 

 And yes, the McCauley does have a resonant vibration in the yellow arc area 

 that is greater than with the Sensenich.

 

 Cliff

 ---

rdp123(at)verizon.net
Guest

Posted: Tue Jan 11, 2011 3:46 pm Post subject: Wow, what a difference!

Tom, I flew my stock Tiger to 18,000ft with half fuel and one passenger when i was testing a portable oxygen system. I was still climbing at about 125 f/m but legally could not go higher into class A airspace  -  The controls were mushy as hell and the plane was going pretty slow.



Rick   



On Jan 11, 2011, at 11:31 AM, Tom Quinn wrote:

[quote]That highest I’ve had my Tiger is 10,000, I could have gone higher I guess at about 200fpm (summer time). What was the highest altitude you were capable of before installing the PF system?

 

Tom Quinn



249RR

 

From: owner-teamgrumman-list-server(at)matronics.com (owner-teamgrumman-list-server(at)matronics.com) [mailto:owner-teamgrumman-list-server(at)matronics.com] On Behalf Of Gary Vogt

Sent: Tuesday, January 11, 2011 2:09 PM

To: teamgrumman-list(at)matronics.com (teamgrumman-list(at)matronics.com)

Subject: Re: Wow, what a difference!

 

the Power Flow on my plane gave me 80 rpm at 17,000 feet.  I was still turning 2675.



 



From: flyv35b <flyv35b(at)minetfiber.com (flyv35b(at)minetfiber.com)>

To: teamgrumman-list(at)matronics.com (teamgrumman-list(at)matronics.com)

Sent: Tue, January 11, 2011 6:19:52 AM

Subject: Re: Wow, what a difference!



--> TeamGrumman-List message posted by: "flyv35b" <flyv35b(at)minetfiber.com (flyv35b(at)minetfiber.com)>



Yes, you can repitch the prop.  And you may want to do that if you 

eventually install the PF exhaust as it will add about 80 rpm to your full 

throttle engine rpm.  If that turns out to be 2900 rpm or thereabouts then 

you might want more pitch.  You have to do some testing to determine where 

you are though.



And yes, the McCauley does have a resonant vibration in the yellow arc area 

that is greater than with the Sensenich.



Cliff

---

Display posts from previous:

	Matronics Email Lists Forum Index -> TeamGrumman-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum