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Author Topic: Australian Belly Tank  (Read 1273019 times)
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kiwi belly tank
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« Reply #5415 on: May 01, 2017, 03:50:37 PM »

My opinion, the rear radius rods are at an extreme angle which presents an elliptical shape to the air flow plus they break the air before the 3" dia axle tube that is 90deg to flow. If you remove them without adding an axle fairing drag would likely increase.
  Sid.
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Dr Goggles
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« Reply #5416 on: May 01, 2017, 04:06:56 PM »

Yeah, when it was built they wanted the radius rods.I'd lean toward Sid's opinion myself... Some may remember that this is a GM housing with Ford axles and tubes. We had some hollow bar turned down and pulled it into the axle tubes from the housing, at a minimum it's 5/8 wall, it is very much Over-engineered.
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Stan Back
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« Reply #5417 on: May 01, 2017, 06:13:14 PM »

L'tle ballast never hurt anybody.
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salt27
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« Reply #5418 on: May 01, 2017, 07:48:27 PM »

Instead of building a new crossmember for the gearbox would it be better to utilize the mounts on the scattershield?

  Don
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kiwi belly tank
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« Reply #5419 on: May 01, 2017, 08:10:51 PM »

L'tle ballast never hurt anybody.
We talkin women or Bonneville cars young Stan? grin
  Sid.
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Dr Goggles
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« Reply #5420 on: May 02, 2017, 03:46:24 AM »

L'tle ballast never hurt anybody.
We talkin women or Bonneville cars young Stan? grin
  Sid.

As long as it's respectful were open for both kinds of blabber, I've raced flyweights, middleweights and the upper classes, there is no discernible correlation between their ballast and their propensity to stay the right way up. Some of those crashes I'll happily admit were down to my driving, others had built handling problems, some the direct fault of others and the rest were just down to acts of god.

The Colonel's correspondence on this matter should be ignored, likewise the Reverend's.
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Few understand what I'm trying to do but they vastly outnumber those who understand why...................

http://thespiritofsunshine.blogspot.com/

Current Australian E/GL record holder at 215.041mph

THE LUCKIEST MAN IN SLOW BUSINESS.
Peter Jack
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« Reply #5421 on: May 02, 2017, 04:18:26 AM »

I'm not trying to be a smart a$$ but would this not be a good time to rebuild the back of the car such that the rear axle bolts in? This would not only allow you an easier way to change the pinion angle but you could carry a spare axle assembly so you didn't have to go through the major work you have to do now to change a ratio.

Pete
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Dr Goggles
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« Reply #5422 on: May 02, 2017, 06:05:07 AM »

What is a likely change Pete is that we will sandwich the main supports for the rear end so we can tilt it away for a ratio change. We're not taking an extra rear assembly with us.

We aren't sure that the pinion angle is wrong , yet.

That arrangement that we have may seem to some brutal and dumb. However there is some reasoning. As the car has no suspension it would be problematic if the rear end wasn't as stiff as it is because it would steer the car when it was loaded up, brutal and dumb, but the car drives straight.

Some would wonder why we didn't bolt it in in the first place?...... I dunno.
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Few understand what I'm trying to do but they vastly outnumber those who understand why...................

http://thespiritofsunshine.blogspot.com/

Current Australian E/GL record holder at 215.041mph

THE LUCKIEST MAN IN SLOW BUSINESS.
awelker
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« Reply #5423 on: May 02, 2017, 02:15:27 PM »

I would stick with the radius rods and use them to your aero advantage.  These wonderfully fashioned foam board and duct tape rear axle fairings were good for a 4 mph increase.  The only downside was explaining to my wife why $10 of duct tape did more than any other changes I had made which cost just a bit more.


Speedweek 2016 by Andrew Welker, on Flickr
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Dr Goggles
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« Reply #5424 on: May 02, 2017, 03:39:44 PM »

That my friend got a lot of laughs at our place. grin grin grin
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Few understand what I'm trying to do but they vastly outnumber those who understand why...................

http://thespiritofsunshine.blogspot.com/

Current Australian E/GL record holder at 215.041mph

THE LUCKIEST MAN IN SLOW BUSINESS.
grumm441
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« Reply #5425 on: May 02, 2017, 05:19:28 PM »

Now there's a solution to a problem neither of us had thought about
and it looks good
G
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Dr Goggles
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« Reply #5426 on: May 02, 2017, 07:04:33 PM »

Now there's a solution to a problem neither of us had thought about
and it looks good
G

You just haven't looked closely enough in my sketch book, I was thinking about it again the other day wink
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Few understand what I'm trying to do but they vastly outnumber those who understand why...................

http://thespiritofsunshine.blogspot.com/

Current Australian E/GL record holder at 215.041mph

THE LUCKIEST MAN IN SLOW BUSINESS.
SPARKY
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« Reply #5427 on: May 02, 2017, 07:55:50 PM »

 cheers
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« Reply #5428 on: May 02, 2017, 08:07:47 PM »

I love the duct tape foam board axle streamlining but I am looking at the polish job on that tank must have taken a lot of time and a ton of compound.

BR
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Dr Goggles
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« Reply #5429 on: May 02, 2017, 11:22:49 PM »

It's a stunning ride, no two ways about it cheers
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Few understand what I'm trying to do but they vastly outnumber those who understand why...................

http://thespiritofsunshine.blogspot.com/

Current Australian E/GL record holder at 215.041mph

THE LUCKIEST MAN IN SLOW BUSINESS.
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