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Author Topic: NACA 66 Special A/BGS  (Read 348823 times)

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Offline robfrey

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NACA 66 Special A/BGS
« 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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Offline Freud

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Re: NACA 66 Special A/BGS
« 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



Since '63

saltfever

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Re: NACA 66 Special A/BGS
« 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?

Offline Geo

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Re: NACA 66 Special A/BGS
« 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

Offline robfrey

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Re: NACA 66 Special A/BGS
« 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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Offline robfrey

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Re: NACA 66 Special A/BGS
« 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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Offline desotoman

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Re: NACA 66 Special A/BGS
« 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.
Asking questions is one's only way of getting answers. As a young boy I was always taught that there is no such thing as a stupid question. It suggests that the quest for knowledge includes failure, and that just because one person may know less than others they should not be afraid to ask rather than pretend they already know. In many cases multiple people may not know but are too afraid to ask the "stupid question"; the one who asks the question may in fact be doing a service to those around them.

Offline bbarn

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Re: NACA 66 Special A/BGS
« 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.
I almost never wake up cranky, I usually just let her sleep in.

Offline desotoman

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Re: NACA 66 Special A/BGS
« 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.
Asking questions is one's only way of getting answers. As a young boy I was always taught that there is no such thing as a stupid question. It suggests that the quest for knowledge includes failure, and that just because one person may know less than others they should not be afraid to ask rather than pretend they already know. In many cases multiple people may not know but are too afraid to ask the "stupid question"; the one who asks the question may in fact be doing a service to those around them.

Offline turborick

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Re: NACA 66 Special A/BGS
« 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
Rick Yacoucci

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Offline robfrey

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Re: NACA 66 Special A/BGS
« 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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Offline robfrey

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Re: NACA 66 Special A/BGS
« 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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Offline RidgeRunner

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Re: NACA 66 Special A/BGS
« Reply #12 on: September 23, 2010, 11:17:30 PM »
Impressive!

PM sent.

                Ed

Offline robfrey

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Re: NACA 66 Special A/BGS
« Reply #13 on: September 23, 2010, 11:23:40 PM »
Thanks Ed.
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Offline jl222

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Re: NACA 66 Special A/BGS
« 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