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Freud
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« Reply #2325 on: October 12, 2016, 09:15:55 AM » |
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One of the suggested explanations for the strange chute behavior
is that the shape of the car has the air exiting the car in a manner
that doesn't allow the chute to open as expected. Such a simple
statement. Some may say, "certainly that's what the influence is
but maybe it's a trade off between good air flow over the car and
nothing there to open the chute." I offer no solution.
A trade off between good air over the car making poor air for the
chutes.
FREUD
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Since '63
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Interested Observer
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« Reply #2326 on: October 12, 2016, 10:42:43 AM » |
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Could be --- The damaged chute, spinning CCW necessarily will impart a CW flow in the near field around it. The second chute, flying in that near field flow will be influenced by that flow to move in it in a CW direction.
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Bob Drury
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« Reply #2327 on: October 12, 2016, 11:06:08 AM » |
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That makes sense to Me... for whatever that's worth... O.R.B., out............................................................  |
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Bob Drury
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kiwi belly tank
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« Reply #2328 on: October 12, 2016, 11:23:26 AM » |
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There are lots of similarities between 550 & the Herbert-Steen liner & I'm not surprised at all to see the undamaged chute fly higher as the speed comes down, it's just the shape of the beast. It looked to me that chute one bit the ground in the dead air as it deployed doing the damage. The spin is obviously the air imbalance & it just wasn't catching enough air to fly with it's twin.
Sid.
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Crackerman
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« Reply #2329 on: October 12, 2016, 12:29:24 PM » |
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So what would be the work around? Fire chutes in an upward and outward manner?
Create dirty air when chutes deploy? Like a flap or air brake?
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Stan Back
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« Reply #2330 on: October 12, 2016, 03:36:12 PM » |
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One-Run,
Now you got me worried.
Stan
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Member of the San Berdoo Roadsters – California's most-exclusive roadster club.
Celebrating 65th anniversary of racing on the salt.
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Kiwi Paul
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« Reply #2331 on: October 13, 2016, 12:20:59 AM » |
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Crackerman, I talked to Marlo about these problems. I think a small drogue may help unsettle the air, but I also think the aero trail may come together where the chute is trying to blossom. Of course, as has been said many times, without testing, all I have is an opinion.....
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kiwi belly tank
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« Reply #2332 on: October 13, 2016, 01:02:06 AM » |
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So what would be the work around? Fire chutes in an upward and outward manner?
Create dirty air when chutes deploy? Like a flap or air brake?
On the Herbert-Steen liner we put two rows of vortex generators on each side to help pull the air around the tail & went to a bigger pilot to catch more air with a stronger spring to launch it further with a longer bridal line. It worked for that but doesn't mean it will work for this. The pilot needs to get out of the dead air to work right. A problem can arise with a tube chute system if it's not packed tight enough, the pounding during the run can unload the pilot spring ending in a weak launch. One way around that situation is to pack the pilot in it's own container plus by doing that you can shoot it into the clean moving air. Too longer bridal line length can allow the pilot to hit the ground & beat it's self to death while main is still flying, that gets expensive at about 100 bucks a pop. Sid. |
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Freud
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« Reply #2333 on: November 05, 2016, 10:58:44 PM » |
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My time is full for about eleven days.
Then I plan to go to Treit's hanger and
gather some more info. That will allow
me to do a sensible post. I miss frequent
posts as much as You do. During the
build time I had my assignments
planned for me each week. Now it is
all so different. I have to dig to get
info for a post and sometimes that
means really scratching. No building
and no racing. What to tell?? No
real idea. I have ask SSS to invited
me to a day and a night in the life
of Slim and energetic Nancy. I don't
imagine that cameras would be
allowed in the inner sanctum. I
may have to do it by feel.
FREUD
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Since '63
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Seldom Seen Slim
Administrator
Hero Member
 Offline
Age: 70
Location: Skandia, Michigan
Posts: 11902
Nancy -- 201.913 mph record on a production ZX15!
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« Reply #2334 on: November 06, 2016, 06:41:20 AM » |
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Jon E. Wennerberg
a/k/a Seldom Seen Slim
Skandia, Michigan
(that's way up north)
2 Club member x2
Owner of landracing.com
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Freud
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« Reply #2335 on: November 09, 2016, 11:50:46 AM » |
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I had a vision................
FREUD
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Since '63
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Stan Back
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« Reply #2336 on: November 09, 2016, 06:39:52 PM » |
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I think I found your vision.
Looking at the 2013 SpeedWeek Program cover, Nancy seems to be paying homage to her favorite unusual old friend.
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Member of the San Berdoo Roadsters – California's most-exclusive roadster club.
Celebrating 65th anniversary of racing on the salt.
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Seldom Seen Slim
Administrator
Hero Member
Offline
Age: 70
Location: Skandia, Michigan
Posts: 11902
Nancy -- 201.913 mph record on a production ZX15!
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« Reply #2337 on: November 09, 2016, 07:13:44 PM » |
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Jon E. Wennerberg
a/k/a Seldom Seen Slim
Skandia, Michigan
(that's way up north)
2 Club member x2
Owner of landracing.com
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Freud
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« Reply #2338 on: November 10, 2016, 11:36:36 AM » |
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Action is more satisfying than words.
FREUD
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Since '63
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Freud
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« Reply #2339 on: December 28, 2016, 02:15:25 PM » |
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When Marlo returned following World of Speed with two broken
quickchange drive shafts he immediately tore down. There were
several confrences with engineers about the solutions. This involved
metal structure, size and shapes of the shafts. It was about a week
before he ordered the shafts. Now the good news............. they
arrived a day before Christmas. I have absolutely no idea what took
so long. I still haven't been to Marlo's shop. As soon as I go I will
make a post and explain all I can. I doubt that I will have answers
about the manufacturing delay.
Happy New Year to all of You.
FREUD
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Since '63
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