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  #21  
Old 10-01-2016, 01:26 PM
sblack sblack is offline
 
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Location: Montreal
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What is the advantage of being low?

That was really exciting to watch!!! Thanks for sharing. For most of us that is the closest we will ever get. Your attention to drag reduction clearly paid off.
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  #22  
Old 10-01-2016, 06:50 PM
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AX-O AX-O is offline
 
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Originally Posted by sblack View Post
What is the advantage of being low?
Think of the pylon as a cone vice a point. The lower you are, the closer you can get to it without being called for a cut. The shorter the track.


The pylon is basically a phone pole with a 55 gal drum on top. The drum does not have a top or bottom. At the base of the pole there is a judge. He or she is looking straight up the drum. If the see any part of your plane in the drum, you cut the pylon.
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RV-4 fastback thread and Pics
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The information that I post is just that; information and my own personal experiences. You need to weight out the pros and cons and make up your own mind/decisions. The pictures posted may not show the final stage or configuration. Build at your own risk.
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  #23  
Old 10-01-2016, 08:27 PM
sblack sblack is offline
 
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Quote:
Originally Posted by AX-O View Post
Think of the pylon as a cone vice a point. The lower you are, the closer you can get to it without being called for a cut. The shorter the track.


The pylon is basically a phone pole with a 55 gal drum on top. The drum does not have a top or bottom. At the base of the pole there is a judge. He or she is looking straight up the drum. If the see any part of your plane in the drum, you cut the pylon.
So it is harder to judge the exact location the higher up you are. I always wondered about that. I thought it was that there was less turbulence down there or something.

I never knew that another racer would clear you to pass. They certainly don't do that in Nascar!

When you land after a heat, or when the adrenalin wears off, you must be totally drained. That looks like way too much fun.
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  #24  
Old 10-01-2016, 11:00 PM
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rvmills rvmills is offline
 
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Scott, you are correct in the judgement of exact location vs altitude. Lower is easier to judge how close to the pylon you are, and how well you are flying your line. But it doesn't make lower always the best choice, as staying low and eating dirty air from the plane(s) ahead is rougher and slower. And the fastest line isn't always the closest to every pylon, due to the geometry of the course, and depending on the speed of the aircraft. Axel called it a cone, or similarly, you can think of it as a cylinder over the barrel, like the light beam over the Luxor in Las Vegas. Put your wing into the beam, and its a cut, like AC said. How close you can judge your proximity to the barrel does change with speed and altitude. As you learn to fly the course, you learn where to put your airplane to fly the fastest line, and how close to the pylon you can get without it being a cut (you don't really know till you cut one). And a position error or turn error on one side of the course has an impact on the next few pylons, perhaps all the way to the other side of the course. Then throw a few other planes in the way, and its a very interesting and challenging environment.

With respect to radio calls: The racer being passed is not required to make the call "you're clear". So as the passing plane, you need to make the judgement when you are clear. We train to temper aggressiveness with caution...and self-preservation. Fortunately, it's rarely a hard concept to teach! Safety first...come back to race another day!

Often the passes are silent. And there are stories where the racers attempting to pass said (for ex), "2-6, 8-7 on your right", and that's all 2-6 needed to hear to make an adjustment, plan a turn, etc, to stay ahead.

But we talk to each other as needed when it gets dynamic, such as approaching a tight turn and you see the guy behind and on your right coming up, but at your altitude, and you know you are about to go belly up to him (legal, because he still has the separation part of the contract as the passer). We may tell him we're going belly up, so he knows it's all on him for separation. Or say he's slightly in front but you have the inside line on the turn (the pass is not complete and he is not opening sufficiently)...we may say "2-6, hold your line", to let him know his nose to tail will not last, and it will not be safe to "close the door" and complete the pass.

Its not constant chatter, but timely calls when, and if, needed. The contest committee chairman complimented our class on our on-course communications. Something we are proud of, as it shows how good pilots, good procedures and good training can make a very dynamic environment a bit safer.

And FWIW, yes...it is very, very addicting!

So if you watched Axel's video, and if you looked at the passing section of the training doc...did you notice AC's nice positioning, lap after lap, while setting up his pass? Methinks he read, listened, and applied it all quite well in the arena, eh! All the RV bubbas did a great job!!!

Cheers,
Bob
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Last edited by rvmills : 10-01-2016 at 11:20 PM.
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  #25  
Old 10-02-2016, 06:47 PM
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skylor skylor is offline
 
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Quote:
Originally Posted by sblack View Post
When you land after a heat, or when the adrenalin wears off, you must be totally drained. That looks like way too much fun.
For me personally, I try to leave the adrenaline out of the racing and fly in a completely relaxed state of mind. I think it's harder to fly precisely when the adrenaline is kicking in. I did have one practice race this year where I let adrenaline get to me a bit. In the Sunday Medallion final, I was part of a pack of 4 planes that were battling hard for second place and I felt very relaxed for the entire flight. The adrenaline and exhilaration really kicked in a few minutes after shut down when I starteted to reflect on what an awesome and fun race it had been!

Skylor
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  #26  
Old 10-03-2016, 09:03 AM
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ppilotmike ppilotmike is offline
 
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Default Nice Video!

Axel,

Thanks for posting. It was pretty neat to see the race from your point of view. How hard was it for you to monitor redline G's while flying, so as not to overstress the airframe?
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  #27  
Old 10-03-2016, 11:03 AM
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AX-O AX-O is offline
 
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Quote:
Originally Posted by ppilotmike View Post
How hard was it for you to monitor redline G's while flying, so as not to overstress the airframe?
Not hard at all. I was trying to make all my turns 2.5 Gs max (my goal was 2G pulls at 60 deg). That way I would not bleed the speed. I kind of forgot that after I passed 26 and started chasing 38. If you look at the video you will see a more aggressive roll in/out and G. I should have just stuck to my line.
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RV-4 fastback thread and Pics
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The information that I post is just that; information and my own personal experiences. You need to weight out the pros and cons and make up your own mind/decisions. The pictures posted may not show the final stage or configuration. Build at your own risk.
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  #28  
Old 10-03-2016, 01:41 PM
acroflyrgirl acroflyrgirl is offline
 
Join Date: Jun 2006
Location: Tucson, AZ
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Default Video envy

AC, your video is great and the commentary from you, Bob and Skylor is very helpful.
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  #29  
Old 10-04-2016, 05:59 PM
wingnut49b wingnut49b is offline
 
Join Date: Jan 2016
Location: Northern IN
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Very cool video. As a car racer, A&P, and professional pilot looking at RV7 kits, this is a heck of a dream.

Thanks for this and the PRS posts. Keep them coming!
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  #30  
Old 10-04-2016, 10:43 PM
jrovey jrovey is offline
 
Join Date: Aug 2011
Location: Wickenburg, Arizona
Posts: 26
Default Nice job!

Looks great Axel. My heart rate went up watching. Medallion definitely had the most time and fun racing close to others.

I am going to make a video of the Sunday Bronze race for the benefit of those who want to see a Sport race from engine start to shutdown. I pretty much had my own air and no passing but I have ground and race control audio tied into the camera mounted to my helmet, another camera facing backwards and plan to add the announcer audio during the race. Once finished I will post a link.
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