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Prop me Up!

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smokyray(at)rocketmail.co
Guest

Posted: Tue Jul 06, 2010 8:27 am Post subject: Prop me Up!

Guys,



  I have decided to "lighten up" the front end of my HR2 and go to a composite propeller. I have seen several MT props for sale in BS and wonder how you MT flyers like your prop? I also like the Whirlwind but $$$ is a factor.  Jim A and Gummy are running 4 blades, how do you guys like them?

   Since most of my flying includes over the top aerobatics, a lighter nose would be nice although my Hartzell 2 blade "paddle" has served me well. 

  Any comments prop or con would be appreciated.

Smokey

               [quote][b]

t.gummo(at)verizon.net
Guest

Posted: Tue Jul 06, 2010 12:21 pm Post subject: Prop me Up!

Smokey,

  

 I very much like the look of my MT prop.  As I  don't fly in the weather and live in the desert, I have not seen the effects of  rain on the paint.  I think I remember hearing about the paint taking a  beating when flying in heavy rain.

  

 I have two issues with the four blade MT prop I  have.  First, I lost about 10 knots TAS at cruise altitude with the four  blade.  When I had the Hartzell two blade, at 10.5 or 11.5 my normal  cruise altitude, full throttle, prop back to 2100 or so, leaned out to 10.5  gallons per hour, I trued at 180 knots.  Now, I true at 170 knots under that same conditions.  Again, it  sure looks good.  Jim Ayers tells me that I don't have enough power to use  the prop properly (my IO-540 J4A5, is only 250 hp).  I did get a great deal  from John when I got it.  (See, I told you all that I have the slowest  rocket.)

  

 Jim Ayers allowed me to use a three blade MT prop  for a couple weeks and it very hard to tell it there was any speed lost at  all.  I keep trying to get him find someone that wants the four blade and  will trade me for the three blade. 

  

 Second, I use the full throttle hot start  technique.  As all the weight is in the hub, it spins up quickly.  (It  was only two pounds lighter than the Hartzell.)  So when the engine starts,  it CAN very quickly gets to 1200 to 1500 prm while I am reducing the throttle,  adding mixture, etc. etc (normally, I don't see that high of rpm on start but it  has happened).

 I have had the tail come off the ground and don't  want ANOTHER Prop strike (reason for getting another prop in the first  place).  Which, it why I clear in front of me and if the plane wants to  roll a couple feet while I am starting, I let it.  So, while I call this an  issue, it is not problem at all.  Like most things, just learn to deal with  it.

  

 So fly out to SoCal and I will let you  see the prop from the rear seat.        

  

 GummiBear

 [quote]   ---

danweseman(at)yahoo.com
Guest

Posted: Tue Jul 06, 2010 4:01 pm Post subject: Prop me Up!

wanna sell the 2 blade hartzell?

 

Dan Weseman

danweseman(at)yahoo.com

www.flycleanex.com

www.fly5thbearing.com  



 

   From: Tom Gummo <t.gummo(at)verizon.net>

To: rocket-list(at)matronics.com

Sent: Tue, July 6, 2010 4:18:50 PM

Subject: Re: Prop me Up!



   Smokey,

  

 I very much like the look of my MT prop.  As I don't fly in the weather and live in the desert, I have not seen the effects of rain on the paint.  I think I remember hearing about the paint taking a beating when flying in heavy rain.

  

 I have two issues with the four blade MT prop I have.  First, I lost about 10 knots TAS at cruise altitude with the four blade.  When I had the Hartzell two blade, at 10.5 or 11.5 my normal cruise altitude, full throttle, prop back to 2100 or so, leaned out to 10.5 gallons per hour, I trued at 180 knots.  Now, I true at 170 knots under that same conditions.  Again, it sure looks good.  Jim Ayers tells me that I don't have enough power to use the prop properly (my IO-540 J4A5, is only 250 hp).  I did get a great deal from John when I got it.  (See, I told you all that I have the slowest rocket.)

  

 Jim Ayers allowed me to use a three blade MT prop for a couple weeks and it very hard to tell it there was any speed lost at all.  I keep trying to get him find someone that wants the four blade and will trade me for the three blade. 

  

 Second, I use the full throttle hot start technique.  As all the weight is in the hub, it spins up quickly.  (It was only two pounds lighter than the Hartzell.)  So when the engine starts, it CAN very quickly gets to 1200 to 1500 prm while I am reducing the throttle, adding mixture, etc. etc (normally, I don't see that high of rpm on start but it has happened).

 I have had the tail come off the ground and don't want ANOTHER Prop strike (reason for getting another prop in the first place).  Which, it why I clear in front of me and if the plane wants to roll a couple feet while I am starting, I let it.  So, while I call this an issue, it is not problem at all.  Like most things, just learn to deal with it.

  

 So fly out to SoCal and I will let you see the prop from the rear seat.       

  

 GummiBear

 [quote] ---

t.gummo(at)verizon.net
Guest

Posted: Tue Jul 06, 2010 4:25 pm Post subject: Prop me Up!

Dan,

  

 I would love to sell you the 2 blade  hartzell.  How about 3000 dollars????

  

 WAIT !!

  

 REREAD !!

  

 the reason for changing to four blade  MT. 

  

 "don't want ANOTHER Prop strike (reason for  getting another prop in the first place)."  

  

 I might even give it to you.  

  

 I would have gone with another 2 blade Hartzell but  there was a 6 month wait and I drove and got the MT prop from John Harmon the  next day. After the engine was re-installed after the prop strike check,  I was flying a day later.

  

 I have beeb loaning out the prop hub to help  builders adjust and fit their cowl.

  

 DO NOT ARCHIVE

  

 GummiBear

 N561FS - Harmon Rocket II

 375 hours and still smiling

  

  

 [quote]   ---

danweseman(at)yahoo.com
Guest

Posted: Tue Jul 06, 2010 5:18 pm Post subject: Prop me Up!

Sorry i was asking Smokey.... 180 knots at 10.5 gph... im going out to buck some rivets 

 

Dan Weseman

danweseman(at)yahoo.com

www.flycleanex.com

www.fly5thbearing.com  



 

   From: Tom Gummo <t.gummo(at)verizon.net>

To: rocket-list(at)matronics.com

Sent: Tue, July 6, 2010 8:24:39 PM

Subject: Re: Prop me Up!



 DIV { MARGIN:0px;}   Dan,

  

 I would love to sell you the 2 blade hartzell.  How about 3000 dollars????

  

 WAIT !!

  

 REREAD !!

  

 the reason for changing to four blade MT. 

  

 "don't want ANOTHER Prop strike (reason for getting another prop in the first place)."  

  

 I might even give it to you.  

  

 I would have gone with another 2 blade Hartzell but there was a 6 month wait and I drove and got the MT prop from John Harmon the next day. After the engine was re-installed after the prop strike check, I was flying a day later.

  

 I have beeb loaning out the prop hub to help builders adjust and fit their cowl.

  

 DO NOT ARCHIVE

  

 GummiBear

 N561FS - Harmon Rocket II

 375 hours and still smiling

  

  

 [quote] ---

lessdragprod(at)aol.com
Guest

Posted: Tue Jul 06, 2010 7:46 pm Post subject: Prop me Up!

Hi Smokey,

    

   Tom Gummo has the 4 blade propeller designed for the HR3 with a 380 hp engine.  Tom Gummo's HR2 doesn't have a 380 hp engine.  Therefore, the speed loss.

    

   The 4 blade propeller designed for the HR2 with 260 hp is set for cruise at 15k.  It is about 2 knots slower than the 3 blade MT propeller at 4k.  And slightly faster tah the 3 blade by around 9k.

    

   If you are flying around 5k, then you'll want a 3 blade propeller.  The standard 3 blade MT Propeller assembly weighs around 56 pounds, conpared to 66 pounds for a Hartzell 2 blade propeller assembly on the same scales.

    

   The 3 blade MT propeller is about 2 knots faster than the "D" blade Hartzell, and the same speed as the "J" blade Hartzell, at Reno race altitudes.

   With both the "D" blade Hartzell and the 3 blade MT Propeller strsight and level at full throttle, above 2600 RPM the aircraft losses about 3 mph.

   The "J" blade Hartzell keeps pulling to 2800 RPM.  However, Wolfgang Meng says with 330 hp, the "J" stops at 2600 RPM, also.

 

 Regards,

   Jim Ayers

 

 

   --

danweseman(at)yahoo.com
Guest

Posted: Wed Jul 07, 2010 4:55 am Post subject: Prop me Up!

Which prop offers most low speed thrust and climbs the best ? 

 

Dan Weseman

danweseman(at)yahoo.com

www.flycleanex.com

www.fly5thbearing.com  



 

   From: "lessdragprod(at)aol.com" <lessdragprod(at)aol.com>

To: rocket-list(at)matronics.com

Sent: Tue, July 6, 2010 11:46:10 PM

Subject: Re: Prop me Up!



 Hi Smokey,

  

 Tom Gummo has the 4 blade propeller designed for the HR3 with a 380 hp engine.  Tom Gummo's HR2 doesn't have a 380 hp engine.  Therefore, the speed loss.

  

 The 4 blade propeller designed for the HR2 with 260 hp is set for cruise at 15k.  It is about 2 knots slower than the 3 blade MT propeller at 4k.  And slightly faster tah the 3 blade by around 9k.

  

 If you are flying around 5k, then you'll want a 3 blade propeller.  The standard 3 blade MT Propeller assembly weighs around 56 pounds, conpared to 66 pounds for a Hartzell 2 blade propeller assembly on the same scales.

  

 The 3 blade MT propeller is about 2 knots faster than the "D" blade Hartzell, and the same speed as the "J" blade Hartzell, at Reno race altitudes.

 With both the "D" blade Hartzell and the 3 blade MT Propeller strsight and level at full throttle, above 2600 RPM the aircraft losses about 3 mph.

 The "J" blade Hartzell keeps pulling to 2800 RPM.  However, Wolfgang Meng says with 330 hp, the "J" stops at 2600 RPM, also.



Regards,

 Jim Ayers

 --

Speedy11(at)aol.com
Guest

Posted: Wed Jul 07, 2010 5:21 am Post subject: Prop me Up!

Smokey,

 I'm flying a lowly RV-8A with 210 HP (and thus don't need 3 blades), but I  have the MT 3 blade and I'm mostly happy with it.  In drag races with 2  blade Hartzells, I stay right with them.

 The spinner is chrome-look, made of Kevlar, and is very light.

 You can see the prop at http://www.rv-8a.net/2007.htm and  scroll down to 2 Apr 07.

 I have flown in light to moderate rain and the leading edge of paint is  shredded.

 Climb performance and acro performance with the 3 blade is excellent.

 Corrosion on the leading edge metal is a constant problem.

 Regards,

 Stan Sutterfield

   	  Quote: 	
		  --I have    decided to "lighten up" the front end of my HR2 and go to a co

mposite    propeller. I have seen several MT props for sale in BS and wonder h

ow you    MT flyers like your prop? I also like the Whirlwind but $$$ is a fac

tor.    -Jim A and Gummy are running 4 blades, how do you guys like them?-

- Since    most of my flying includes over the top aerobatics, a lighter nos

e would    be nice although my Hartzell 2 blade "paddle" has served me  well 	


  [quote][b]

lessdragprod(at)aol.com
Guest

Posted: Wed Jul 07, 2010 12:21 pm Post subject: Prop me Up!

That would be the 80" diameter 3 blade MT Propeller that Sean Tucker and Kirby Chamblis use.

    

   We haven't talked about that one yet.  Of course, cruise speed suffers slightly.

 

 Jim Ayers

   

 

 

   --

smokyray(at)rocketmail.co
Guest

Posted: Wed Jul 07, 2010 2:32 pm Post subject: Prop me Up!

Hi Gummy, greatly appreciate it!  My "classic" HR2 performs exactly like yours did with the 2 blade D twist. I operate off a short grass strip and most every flight involves aerobatics, so a light nose would be very nice. 



 Jim Ayers is working some numbers up for a three blade MT, looking forward to seeing it.

Thanks again!

Smokey 



--- On Tue, 7/6/10, Tom Gummo <t.gummo(at)verizon.net> wrote:

[quote]

From: Tom Gummo <t.gummo(at)verizon.net>

Subject: Re: Prop me Up!

To: rocket-list(at)matronics.com

Date: Tuesday, July 6, 2010, 1:18 PM



          Smokey,

  

 I very much like the look of my MT prop.  As I  don't fly in the weather and live in the desert, I have not seen the effects of  rain on the paint.  I think I remember hearing about the paint taking a  beating when flying in heavy rain.

  

 I have two issues with the four blade MT prop I  have.  First, I lost about 10 knots TAS at cruise altitude with the four  blade.  When I had the Hartzell two blade, at 10.5 or 11.5 my normal  cruise altitude, full throttle, prop back to 2100 or so, leaned out to 10.5  gallons per hour, I trued at 180 knots.  Now, I true at 170 knots under that same conditions.  Again, it  sure looks good.  Jim Ayers tells me that I don't have enough power to use  the prop properly (my IO-540 J4A5, is only 250 hp).  I did get a great deal  from John when I got it.  (See, I told you all that I have the slowest  rocket.)

  

 Jim Ayers allowed me to use a three blade MT prop  for a couple weeks and it very hard to tell it there was any speed lost at  all.  I keep trying to get him find someone that wants the four blade and  will trade me for the three blade. 

  

 Second, I use the full throttle hot start  technique.  As all the weight is in the hub, it spins up quickly.  (It  was only two pounds lighter than the Hartzell.)  So when the engine starts,  it CAN very quickly gets to 1200 to 1500 prm while I am reducing the throttle,  adding mixture, etc. etc (normally, I don't see that high of rpm on start but it  has happened).

 I have had the tail come off the ground and don't  want ANOTHER Prop strike (reason for getting another prop in the first  place).  Which, it why I clear in front of me and if the plane wants to  roll a couple feet while I am starting, I let it.  So, while I call this an  issue, it is not problem at all.  Like most things, just learn to deal with  it.

  

 So fly out to SoCal and I will let you  see the prop from the rear seat.        

  

 GummiBear

 [quote]   ---

jrstone(at)insightbb.com
Guest

Posted: Wed Jul 07, 2010 3:35 pm Post subject: Prop me Up!

Rob, just to chime in, I love my MT 3 blade 205 kts TAS at max map, 2300 rpm and 11 gal/hr up to 9k then less above. I get about 500 miles with a 10 gal reserve, no wind.  I normally cruise at 9 or above with max map and 2200 rpm yielding 198-200 kts TAS.  I got my MT from Jim A. he is a great source of accurate info.Jim StoneLouisville Ky

PS  When we gonna have that east coast Rocket fly-in?





On Jul 7, 2010, at 6:28 PM, Rob Ray wrote:

Hi Gummy, greatly appreciate it!  My "classic" HR2 performs exactly like yours did with the 2 blade D twist. I operate off a short grass strip and most every flight involves aerobatics, so a light nose would be very nice. 



 Jim Ayers is working some numbers up for a three blade MT, looking forward to seeing it.

Thanks again!

Smokey 



--- On Tue, 7/6/10, Tom Gummo <t.gummo(at)verizon.net (t.gummo(at)verizon.net)> wrote:

[quote]

From: Tom Gummo <t.gummo(at)verizon.net (t.gummo(at)verizon.net)>

Subject: Re: Prop me Up!

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

Date: Tuesday, July 6, 2010, 1:18 PM



          Smokey,

  

 I very much like the look of my MT prop.  As I  don't fly in the weather and live in the desert, I have not seen the effects of  rain on the paint.  I think I remember hearing about the paint taking a  beating when flying in heavy rain.

  

 I have two issues with the four blade MT prop I  have.  First, I lost about 10 knots TAS at cruise altitude with the four  blade.  When I had the Hartzell two blade, at 10.5 or 11.5 my normal  cruise altitude, full throttle, prop back to 2100 or so, leaned out to 10.5  gallons per hour, I trued at 180 knots.  Now, I true at 170 knots under that same conditions.  Again, it  sure looks good.  Jim Ayers tells me that I don't have enough power to use  the prop properly (my IO-540 J4A5, is only 250 hp).  I did get a great deal  from John when I got it.  (See, I told you all that I have the slowest  rocket.)

  

 Jim Ayers allowed me to use a three blade MT prop  for a couple weeks and it very hard to tell it there was any speed lost at  all.  I keep trying to get him find someone that wants the four blade and  will trade me for the three blade. 

  

 Second, I use the full throttle hot start  technique.  As all the weight is in the hub, it spins up quickly.  (It  was only two pounds lighter than the Hartzell.)  So when the engine starts,  it CAN very quickly gets to 1200 to 1500 prm while I am reducing the throttle,  adding mixture, etc. etc (normally, I don't see that high of rpm on start but it  has happened).

 I have had the tail come off the ground and don't  want ANOTHER Prop strike (reason for getting another prop in the first  place).  Which, it why I clear in front of me and if the plane wants to  roll a couple feet while I am starting, I let it.  So, while I call this an  issue, it is not problem at all.  Like most things, just learn to deal with  it.

  

 So fly out to SoCal and I will let you  see the prop from the rear seat.        

  

 GummiBear

 [quote]   ---

danweseman(at)yahoo.com
Guest

Posted: Wed Jul 07, 2010 5:12 pm Post subject: Prop me Up!

Hi Guys Im still up for a fall east coast rocket flyin. I talked to my rv freinds and they are up for one here at 7FL (haller airpark) i was wanting to get past Oshkosh then start making plans,any suggestions for a date etc  would be great. 

 

Dan Weseman

danweseman(at)yahoo.com

www.flycleanex.com

www.fly5thbearing.com  



 

   From: Jim Stone <jrstone(at)insightbb.com>

To: rocket-list(at)matronics.com

Sent: Wed, July 7, 2010 7:34:50 PM

Subject: Re: Prop me Up!



Rob, just to chime in, I love my MT 3 blade 205 kts TAS at max map, 2300 rpm and 11 gal/hr up to 9k then less above. I get about 500 miles with a 10 gal reserve, no wind.  I normally cruise at 9 or above with max map and 2200 rpm yielding 198-200 kts TAS.  I got my MT from Jim A. he is a great source of accurate info.  Jim Stone  Louisville Ky

 PS  When we gonna have that east coast Rocket fly-in?

 



 



   On Jul 7, 2010, at 6:28 PM, Rob Ray wrote:

    Hi Gummy, greatly appreciate it!  My "classic" HR2 performs exactly like yours did with the 2 blade D twist. I operate off a short grass strip and most every flight involves aerobatics, so a light nose would be very nice.   



  Jim Ayers is working some numbers up for a three blade MT, looking forward to seeing it.

 



 Thanks again!

 Smokey 



--- On Tue, 7/6/10, Tom Gummo <t.gummo(at)verizon.net (t.gummo(at)verizon.net)> wrote:

 [quote]

From: Tom Gummo <t.gummo(at)verizon.net (t.gummo(at)verizon.net)>

Subject: Re: Prop me Up!

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

Date: Tuesday, July 6, 2010, 1:18 PM



    Smokey,

  

 I very much like the look of my MT prop.  As I don't fly in the weather and live in the desert, I have not seen the effects of rain on the paint.  I think I remember hearing about the paint taking a beating when flying in heavy rain.

  

 I have two issues with the four blade MT prop I have.  First, I lost about 10 knots TAS at cruise altitude with the four blade.  When I had the Hartzell two blade, at 10.5 or 11.5 my normal cruise altitude, full throttle, prop back to 2100 or so, leaned out to 10.5 gallons per hour, I trued at 180 knots.  Now, I true at 170 knots under that same conditions.  Again, it sure looks good.  Jim Ayers tells me that I don't have enough power to use the prop properly (my IO-540 J4A5, is only 250 hp).  I did get a great deal from John when I got it.  (See, I told you all that I have the slowest rocket.)

  

 Jim Ayers allowed me to use a three blade MT prop for a couple weeks and it very hard to tell it there was any speed lost at all.  I keep trying to get him find someone that wants the four blade and will trade me for the three blade. 

  

 Second, I use the full throttle hot start technique.  As all the weight is in the hub, it spins up quickly.  (It was only two pounds lighter than the Hartzell.)  So when the engine starts, it CAN very quickly gets to 1200 to 1500 prm while I am reducing the throttle, adding mixture, etc. etc (normally, I don't see that high of rpm on start but it has happened).

 I have had the tail come off the ground and don't want ANOTHER Prop strike (reason for getting another prop in the first place).  Which, it why I clear in front of me and if the plane wants to roll a couple feet while I am starting, I let it.  So, while I call this an issue, it is not problem at all.  Like most things, just learn to deal with it.

  

 So fly out to SoCal and I will let you see the prop from the rear seat.       

  

 GummiBear

 [quote] ---

smokyray(at)rocketmail.co
Guest

Posted: Thu Jul 08, 2010 10:56 am Post subject: Prop me Up!

Thanks Jim!



Sent from my iPhone



On Jul 7, 2010, at 7:34 PM, Jim Stone <jrstone(at)insightbb.com (jrstone(at)insightbb.com)> wrote:



[quote]Rob, just to chime in, I love my MT 3 blade 205 kts TAS at max map, 2300 rpm and 11 gal/hr up to 9k then less above. I get about 500 miles with a 10 gal reserve, no wind.  I normally cruise at 9 or above with max map and 2200 rpm yielding 198-200 kts TAS.  I got my MT from Jim A. he is a great source of accurate info.Jim StoneLouisville Ky

PS  When we gonna have that east coast Rocket fly-in?





On Jul 7, 2010, at 6:28 PM, Rob Ray wrote:

Hi Gummy, greatly appreciate it!  My "classic" HR2 performs exactly like yours did with the 2 blade D twist. I operate off a short grass strip and most every flight involves aerobatics, so a light nose would be very nice. 



 Jim Ayers is working some numbers up for a three blade MT, looking forward to seeing it.

Thanks again!

Smokey 



--- On Tue, 7/6/10, Tom Gummo <[url=mailto:t.gummo(at)verizon.net]t.gummo(at)verizon.net (t.gummo(at)verizon.net)[/url]> wrote:

[quote]

From: Tom Gummo <[url=mailto:t.gummo(at)verizon.net]t.gummo(at)verizon.net (t.gummo(at)verizon.net)[/url]>

Subject: Re: Prop me Up!

To: [url=mailto:rocket-list(at)matronics.com]rocket-list(at)matronics.com (rocket-list(at)matronics.com)[/url]

Date: Tuesday, July 6, 2010, 1:18 PM



          Smokey,

  

 I very much like the look of my MT prop.  As I  don't fly in the weather and live in the desert, I have not seen the effects of  rain on the paint.  I think I remember hearing about the paint taking a  beating when flying in heavy rain.

  

 I have two issues with the four blade MT prop I  have.  First, I lost about 10 knots TAS at cruise altitude with the four  blade.  When I had the Hartzell two blade, at 10.5 or 11.5 my normal  cruise altitude, full throttle, prop back to 2100 or so, leaned out to 10.5  gallons per hour, I trued at 180 knots.  Now, I true at 170 knots under that same conditions.  Again, it  sure looks good.  Jim Ayers tells me that I don't have enough power to use  the prop properly (my IO-540 J4A5, is only 250 hp).  I did get a great deal  from John when I got it.  (See, I told you all that I have the slowest  rocket.)

  

 Jim Ayers allowed me to use a three blade MT prop  for a couple weeks and it very hard to tell it there was any speed lost at  all.  I keep trying to get him find someone that wants the four blade and  will trade me for the three blade. 

  

 Second, I use the full throttle hot start  technique.  As all the weight is in the hub, it spins up quickly.  (It  was only two pounds lighter than the Hartzell.)  So when the engine starts,  it CAN very quickly gets to 1200 to 1500 prm while I am reducing the throttle,  adding mixture, etc. etc (normally, I don't see that high of rpm on start but it  has happened).

 I have had the tail come off the ground and don't  want ANOTHER Prop strike (reason for getting another prop in the first  place).  Which, it why I clear in front of me and if the plane wants to  roll a couple feet while I am starting, I let it.  So, while I call this an  issue, it is not problem at all.  Like most things, just learn to deal with  it.

  

 So fly out to SoCal and I will let you  see the prop from the rear seat.        

  

 GummiBear

 [quote]   ---

smokyray(at)rocketmail.co
Guest

Posted: Thu Jul 08, 2010 10:57 am Post subject: Prop me Up!

How about 1 Oct( my birthday:)

Smokey



Sent from my iPhone



On Jul 7, 2010, at 9:12 PM, Daniel Weseman <danweseman(at)yahoo.com (danweseman(at)yahoo.com)> wrote:



[quote]

 Hi Guys Im still up for a fall east coast rocket flyin. I talked to my rv freinds and they are up for one here at 7FL (haller airpark) i was wanting to get past Oshkosh then start making plans,any suggestions for a date etc  would be great. 

 

Dan Weseman

danweseman(at)yahoo.com (danweseman(at)yahoo.com)

www.flycleanex.com

www.fly5thbearing.com  



 

   From: Jim Stone <jrstone(at)insightbb.com>

To: rocket-list(at)matronics.com

Sent: Wed, July 7, 2010 7:34:50 PM

Subject: Re: Prop me Up!



Rob, just to chime in, I love my MT 3 blade 205 kts TAS at max map, 2300 rpm and 11 gal/hr up to 9k then less above. I get about 500 miles with a 10 gal reserve, no wind.  I normally cruise at 9 or above with max map and 2200 rpm yielding 198-200 kts TAS.  I got my MT from Jim A. he is a great source of accurate info.  Jim Stone  Louisville Ky

 PS  When we gonna have that east coast Rocket fly-in?

 



 



   On Jul 7, 2010, at 6:28 PM, Rob Ray wrote:

    Hi Gummy, greatly appreciate it!  My "classic" HR2 performs exactly like yours did with the 2 blade D twist. I operate off a short grass strip and most every flight involves aerobatics, so a light nose would be very nice.   



  Jim Ayers is working some numbers up for a three blade MT, looking forward to seeing it.

 



 Thanks again!

 Smokey 



--- On Tue, 7/6/10, Tom Gummo <t.gummo(at)verizon.net (t.gummo(at)verizon.net)> wrote:

 [quote]

From: Tom Gummo <t.gummo(at)verizon.net (t.gummo(at)verizon.net)>

Subject: Re: Prop me Up!

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

Date: Tuesday, July 6, 2010, 1:18 PM



    Smokey,

  

 I very much like the look of my MT prop.  As I don't fly in the weather and live in the desert, I have not seen the effects of rain on the paint.  I think I remember hearing about the paint taking a beating when flying in heavy rain.

  

 I have two issues with the four blade MT prop I have.  First, I lost about 10 knots TAS at cruise altitude with the four blade.  When I had the Hartzell two blade, at 10.5 or 11.5 my normal cruise altitude, full throttle, prop back to 2100 or so, leaned out to 10.5 gallons per hour, I trued at 180 knots.  Now, I true at 170 knots under that same conditions.  Again, it sure looks good.  Jim Ayers tells me that I don't have enough power to use the prop properly (my IO-540 J4A5, is only 250 hp).  I did get a great deal from John when I got it.  (See, I told you all that I have the slowest rocket.)

  

 Jim Ayers allowed me to use a three blade MT prop for a couple weeks and it very hard to tell it there was any speed lost at all.  I keep trying to get him find someone that wants the four blade and will trade me for the three blade. 

  

 Second, I use the full throttle hot start technique.  As all the weight is in the hub, it spins up quickly.  (It was only two pounds lighter than the Hartzell.)  So when the engine starts, it CAN very quickly gets to 1200 to 1500 prm while I am reducing the throttle, adding mixture, etc. etc (normally, I don't see that high of rpm on start but it has happened).

 I have had the tail come off the ground and don't want ANOTHER Prop strike (reason for getting another prop in the first place).  Which, it why I clear in front of me and if the plane wants to roll a couple feet while I am starting, I let it.  So, while I call this an issue, it is not problem at all.  Like most things, just learn to deal with it.

  

 So fly out to SoCal and I will let you see the prop from the rear seat.       

  

 GummiBear

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