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Formula one speeds - 9/10/2005 4:43:29 AM   
LGM Graphix



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Status: offline 		Ok, having an arguement with a couple of jet buddies who just bought old F1 planes, they're going to run Nelson F1 engines, and they claim they're breaking 200mph without issue, I call bulls***, none of the F1 planes I ever ran could hit 200 +. Anyone here with some REAL racing experience think they'll break 200 in straight and level flight? This is their claim, I'm to busy laughing to argue it :P

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RE: Formula one speeds - 9/10/2005 5:31:51 AM   
HighPlains


 

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Status: offline 		Not even close to 200. A very good one could do about 175, but there were not too many above mid 160's. In a dive however, you could pick up a bunch of speed.

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RE: Formula one speeds - 9/10/2005 4:38:11 PM   
LGM Graphix



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Status: offline 		Thanks high plains, that's been my experience as well, 200 MAYBE out of a huge dive, but I don't think I've ever had one of my F1 planes hit 200 and I've done some huge dives :P

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RE: Formula one speeds - 9/10/2005 6:38:36 PM   
sandslx



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Justin

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RE: Formula one speeds - 9/10/2005 6:59:49 PM   
Rebellion


 

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Status: offline 		I see this bench racing session has spread over here.

For those of you who might be interested I'll try to fill you in a bit. The whole thing started over a video of a Weston UK Magnum posted by Dave Shulman over at RC Jet .net. You can find the thread HERE if anyone is interested. The discussion got quite lively in the chat room last night with Jeremy being outnumbered two to one by Justin Sands and John VH. The final showdown should be quite interesting.

Bets anyone ?


Dave


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RE: Formula one speeds - 9/10/2005 7:07:31 PM   
JohnVH



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Status: offline 		hey squealer, haha

this is going to be interesting...

< Message edited by JohnVH -- 9/10/2005 7:13:28 PM >

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RE: Formula one speeds - 9/10/2005 8:10:06 PM   
AlW



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From: Bellevue, WA, USA
Status: offline 		Hi All,
As someone who competed in Formula 1 for 20+ years a few comments are in order. First there is a major difference between on cource speed and long diving or level runs. The course was only 608 ft long so there was NO chance to get up to terminal velocity. In order to be competive in Formula 1 you needed to understand how to set up the motor for the particular climatic conditions, select the correct nitro content and most important select a prop which will make the motor run towards the top end of the power band and not ever allow it to get on the back side of the curve. A good combination will be around 170-175 on course. Now lets forget on course stuff and prop the airplane for long speed runs - prop will be higher pitched to stay on the power band , the motor will not be lugged down in tight pylon turns -200mph will not be out of the question.
Al Watson
NMPRA 15e

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RE: Formula one speeds - 9/11/2005 10:41:40 PM   
Ed Smith


 

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quote:

Now lets forget on course stuff and prop the airplane for long speed runs - prop will be higher pitched to stay on the power band , the motor will not be lugged down in tight pylon turns -200mph will not be out of the question.


Well maybe, but that is not quite the same thing is it?. My interpretation of an F1 airplane would be one that is set up for F1 racing. Can we get the airframe to go 200 mph? Probably. Certainly not with a high pitch prop. A high pitch prop would lug a racing motor down at the very beginning. The motor would be cooked in very short order.

Back at the beginning of this year on the extreme speed (read dreams) thread we were promised a twin, piped Jett delta that would go 200 mph straight up. I bet a case of real Canadian beer to a bottle of rum that one of my AMA 428 racers would beat it. Do a search on "Boogie Boards" and read the results of that. Whenever speed dreamers dream of speed the magic 200 mph floats by on a cloud.

Ed S

Ed S

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RE: Formula one speeds - 9/12/2005 3:46:26 AM   
daven



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Status: offline 		Ed,

Your always good entertainment.

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RE: Formula one speeds - 9/15/2005 6:26:04 PM   
Per_N



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Status: offline 		I'm not sure what you mean with formula 1, but the F3d planes surely beats the 200 miles limit easy.


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RE: Formula one speeds - 9/15/2005 7:17:31 PM   
daven



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Status: offline 		Different Animal Per

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RE: Formula one speeds - 9/15/2005 11:47:13 PM   
Ed Smith


 

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quote:

I'm not sure what you mean with formula 1, but the F3d planes surely beats the 200 miles limit easy.


Well not easily. 200 mph is approximately 320 KPH. Chris Callows fastest time in France was 56.98. This is truly a healthy time but it is only a couple of seconds faster than the US Q40 record flying basically the same size course. The Q40 racers are not close to 200mph.

Ed S

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RE: Formula one speeds - 9/16/2005 1:15:51 AM   
HighPlains


 

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Status: offline 		The FAI have two big advantages over the American Q40. The course is wider at 2-3 for lower g loading, and the wingspan has no limit which cuts drag in the turns.

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RE: Formula one speeds - 9/17/2005 3:36:19 AM   
Terryoc


 

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Status: offline 		The course being wider at 2-3 is no advantage this makes the straight shorter so less time to build speed and a bigger turning circle is drag for longer or as Chris Callow flys a turn at 2 and a turn at 3 so an extra turn .
What would be interesting would be a good F3D on the Q40 course , anyone for 53's
Terry

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RE: Formula one speeds - 9/17/2005 3:55:08 AM   
JohnVH



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Status: offline 		OK guys, we did an offical run today, with a used nelson motor, and and old prop, used plug.. etc... flat and level on 30% fuel and richened up to 21K on the ground it went through the traps at 207.4MPH This was with NO DIVE... it easily broke 200MPH, we will be doing more runs tomorrow.

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RE: Formula one speeds - 9/17/2005 4:18:58 AM   
Doug Cronkhite


 

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Status: offline 		175mph average on the course would suggest over 200mph straight line speeds. Turns scrub quite a bit of speed off I'd think. At least turn 1 does, and 2 - 3 not so much.

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RE: Formula one speeds - 9/17/2005 4:27:40 AM   
daven



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