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Author Topic: NACA 66 Special A/BGS  (Read 49673 times)
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robfrey
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« on: September 23, 2010, 08:12:28 PM »

Alright, here is Brandon and my project. Target of 400mph budget of under 50k plus my engine from Vinny.

















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Freud
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« Reply #1 on: September 23, 2010, 08:39:41 PM »

This is going to be a marvelous project to follow as you build.

You certainly have stepped outside the normal aero package.

If you use a turbo we won't even be able to hear it as you swish past us.

For the shake down tests you could borrow my McCoy 35 engine?

It would probably go 150 MPH.

Thanks for revealing your project and good luck.

Welcome again.

FREUD



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saltfever
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« Reply #2 on: September 23, 2010, 08:39:54 PM »

NICE!  May need more radius on the outside edges of the metal wheels. Rules are strict and you can't cut into the salt. Why did you eliminate triangulation on the bottom rails?
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Geo
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« Reply #3 on: September 23, 2010, 08:55:48 PM »

Brandon has the right hue!

This will be a build to follow.  Please  share your thoughts on the wide rear track and wing surfaces.

Geo
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robfrey
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« Reply #4 on: September 23, 2010, 09:20:47 PM »

NICE!  May need more radius on the outside edges of the metal wheels. Rules are strict and you can't cut into the salt. Why did you eliminate triangulation on the bottom rails?

Yes, we have been juggling the size of the radii on the outside edges of the wheels. The bigger the radius, the smaller the contact patch and the more it will press into the salt but smaller radii will probably leave a more pronounced mark.
I just started the cage design today so all bars are not in yet. Probably shouldn't have posted those cage pics yet.
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« Reply #5 on: September 23, 2010, 09:40:38 PM »

Brandon has the right hue!

This will be a build to follow.  Please  share your thoughts on the wide rear track and wing surfaces.

Geo

The large airfoil over the axle will make lots of very efficient downforce especially since it is in ground effect. The wide track adds much stability and lets us build the rear wing larger with very little angle of attack to keep it efficient.
Design intent was to minimize separation drag, stagnation drag, and wetted area. NACA 66-018 airfoil shape was used on the fuselage, rear wing, wheel pants, and front wheel skirt. Rear wheel pants will act as vertical stabilizers.
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desotoman
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« Reply #6 on: September 23, 2010, 09:42:06 PM »

Please tell me those are not metallic wheels in the rear. If they are please reconsider.

Tom G.
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"Got'Cha" was first run in 1974. Bill Temple entered both 2 clubs in 1976 with records in AA/BGR. At El Mirage 201.79 and Bonneville at 220.

In 1977 Greg Temple started driving "Got'Cha" and entered the El Mirage Dirty 2 club in 1979 @ 201.97. Greg went on to set two records at Bonneville, one in 1981 at 241.848, then in 1991 he set another record at 262.230

Bill and Greg were the first father and son to enter the El Mirage Dirty 2 club. They broke the D/BFR at Bonneville in 1981 @ 241 with top speed of 249. This record still stands today. In 1991 they set the A/BFR @ 262 which was later broke by Duane McKinney.
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« Reply #7 on: September 23, 2010, 10:24:08 PM »

Please tell me those are not metallic wheels in the rear. If they are please reconsider.

Tom G.

Not metallic, MT 28.5 Bonneville tires.
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« Reply #8 on: September 23, 2010, 10:29:43 PM »

Thanks, you had me worried for a second. Best of luck with the build.

Tom G.
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"Got'Cha" was first run in 1974. Bill Temple entered both 2 clubs in 1976 with records in AA/BGR. At El Mirage 201.79 and Bonneville at 220.

In 1977 Greg Temple started driving "Got'Cha" and entered the El Mirage Dirty 2 club in 1979 @ 201.97. Greg went on to set two records at Bonneville, one in 1981 at 241.848, then in 1991 he set another record at 262.230

Bill and Greg were the first father and son to enter the El Mirage Dirty 2 club. They broke the D/BFR at Bonneville in 1981 @ 241 with top speed of 249. This record still stands today. In 1991 they set the A/BFR @ 262 which was later broke by Duane McKinney.
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« Reply #9 on: September 23, 2010, 10:43:12 PM »

I like the shape but I think the driver should sit further back in the chassis
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Rick Yacoucci

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robfrey
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« Reply #10 on: September 23, 2010, 10:57:28 PM »

This is going to be a marvelous project to follow as you build.

You certainly have stepped outside the normal aero package.

If you use a turbo we won't even be able to hear it as you swish past us.

For the shake down tests you could borrow my McCoy 35 engine?

It would probably go 150 MPH.

Thanks for revealing your project and good luck.

Welcome again.

FREUD

Thanks Freud. Coming from you, that means a lot to us.
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« Reply #11 on: September 23, 2010, 10:59:31 PM »

I like the shape but I think the driver should sit further back in the chassis

Me too but it was design compromise we have to live with to get this shape.
Good to hear from you Rick!
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« Reply #12 on: September 23, 2010, 11:17:30 PM »

Impressive!

PM sent.

                Ed
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robfrey
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« Reply #13 on: September 23, 2010, 11:23:40 PM »

Thanks Ed.
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jl222
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« Reply #14 on: September 23, 2010, 11:38:18 PM »

Impressive!

PM sent.

                Ed

  Ditto...very impressive, I like the wide stance and use of wings cheers


                      JL222
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