RE: New Q500 Profi engine  
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All Forums >> RC Airplanes >> Pylon Universe - RC Pylon Racing >> Q-500 Racing >> RE: New Q500 Profi engine Page: <<   < prev  1 [2] 3   next >   >>  

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RE: New Q500 Profi engine - 9/9/2007 3:56:35 PM   
iamtom


 

Posts: 83
Joined: 4/30/2006
From: Cincinnati, OH, USA
Status: offline 		Is this engine of Longer stroke design or more like the shorter version? I guess it dosn't matter if it runs smooth.
Tom

(in reply to Bill Vargas)
       Post #: 26

RE: New Q500 Profi engine - 9/10/2007 12:37:09 AM   
SSAN



Posts: 440
Joined: 1/19/2002
From: Queen Creek, AZ, USA
Status: offline 		Tom,

I don't think that would matter at all since Q500 engines don't turned high enough RPM's to throw blade. Regardless if it's super smooth or normally balanced like the current Q500 engines such as the Jett and Nelson SS. With that said, I've put my name on the backlog list to get one based on their race test report. I hope it's good as it sound, but we'll find out sooner or later.

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(in reply to iamtom)
       Post #: 27

RE: New Q500 Profi engine - 9/29/2007 11:12:36 PM   
Conrod


 

Posts: 118
Joined: 1/24/2003
From: Palmerston North, NEW ZEALAND
Status: offline 		The Nelson LS Q500 now have 12mm gas passage cranks.

(in reply to SSAN)
       Post #: 28

RE: New Q500 Profi engine - 9/29/2007 11:50:53 PM   
garys


 

Posts: 732
Joined: 1/31/2002
From: San Diego, CA, USA
Status: offline 		The Nelsons for use with 15% nitro have 11mm passages. The 12mm cranks are for the other markets that use FAI fuel and larger intake openings.

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GS

(in reply to Conrod)
       Post #: 29

RE: New Q500 Profi engine - 9/30/2007 12:24:20 AM   
Conrod


 

Posts: 118
Joined: 1/24/2003
From: Palmerston North, NEW ZEALAND
Status: offline 		Hi
These are Q500 LS with 9mm carbs for nitro fuel, Dave Shadel said that all the Nelsons now have large gas passages, as I asked him why my motors had 12mm cranks fitted.
Geoff

(in reply to garys)
       Post #: 30

RE: New Q500 Profi engine - 9/30/2007 2:39:39 AM   
garys


 

Posts: 732
Joined: 1/31/2002
From: San Diego, CA, USA
Status: offline 		Interesting, he lists both 11 and 12mm on his website. With the SS's, the 12mm was only for no nitro.

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GS

(in reply to Conrod)
       Post #: 31

RE: New Q500 Profi engine - 9/30/2007 11:58:59 AM   
mroos



Posts: 45
Joined: 12/25/2005
From: Oberdiebach (near Mainz), GERMANY
Status: offline 		Profi engine: Bore: 21,5mm. Stroke: 18mm

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(in reply to garys)
       Post #: 32

RE: New Q500 Profi engine - 9/30/2007 6:45:46 PM   
garys


 

Posts: 732
Joined: 1/31/2002
From: San Diego, CA, USA
Status: offline 		Mario,
Are you sure about those measurements? That bore seems big.
GS

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GS

(in reply to mroos)
       Post #: 33

RE: New Q500 Profi engine - 9/30/2007 7:56:57 PM   
fizzwater2


 

Posts: 681
Joined: 8/16/2004
From: Paola, KS, USA
Status: offline 		Sounds like 0.846 x 0.708 or so to me.. familiar numbers.

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       Post #: 34

RE: New Q500 Profi engine - 9/30/2007 8:45:34 PM   
garys


 

Posts: 732
Joined: 1/31/2002
From: San Diego, CA, USA
Status: offline 		Yep, sounds ok. I guess I just never thought of them in metric measurements.

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GS

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       Post #: 35

RE: New Q500 Profi engine - 9/30/2007 8:53:13 PM   
fizzwater2


 

Posts: 681
Joined: 8/16/2004
From: Paola, KS, USA
Status: offline 		Me, too - that's why I did the conversion! 21.5 did sound big. You gotta admit, 21.5 is a whole lot more sensible number than 0.846, right?

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       Post #: 36

RE: New Q500 Profi engine - 9/30/2007 9:38:41 PM   
HighPlains


 

Posts: 2545
Joined: 3/2/2003
From: Over da rainbow, KS, USA
Status: offline 		Why does 21.5 sound better than 0.846?

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RE: New Q500 Profi engine - 9/30/2007 11:39:29 PM   
fizzwater2


 

Posts: 681
Joined: 8/16/2004
From: Paola, KS, USA
Status: offline 		just because.

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       Post #: 38

RE: New Q500 Profi engine - 10/1/2007 12:20:05 AM   
HighPlains


 

Posts: 2545
Joined: 3/2/2003
From: Over da rainbow, KS, USA
Status: offline 		Yeah, it makes TOTAL SENSE to base the measurement on 1/10,000,000 the distance from the equator to the north pole.

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RE: New Q500 Profi engine - 10/1/2007 3:05:16 AM   
fizzwater2


 

Posts: 681
Joined: 8/16/2004
From: Paola, KS, USA
Status: offline 		Almost as much sense as basing it on Roman walking...

The term mile has been around since the time of the Roman Empire, but it has acquired many different meanings over the centuries. The Roman army devised the unit of a mille passus, or 1,000 double paces, later referred to simply as a milion. Since two paces was equal to 5 feet, the Roman mile was 5,000 Roman feet in length. The unit of a foot also comes down to us from Roman times, but the Roman foot was only 11.65 inches in length when compared to the modern dimension. A Roman mile is therefore the equivalent of 4,850 feet, 1,615 yards, or 1,479 meters in modern dimensions.



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RE: New Q500 Profi engine - 10/21/2007 2:34:57 PM   
dapan


 

Posts: 61
Joined: 7/25/2004
From: larisa, GREECE
Status: offline 		hi all
Any new for this engine?? i am waitting one of this new engine this week and its importand to know comments...
thanks

dapan