[DeTomaso] [EXTERNAL] Gr4 Pantera at Le Mans video

[Himes, Terry (US 397C)]

Euuu.  Great real-time test evidence. 180. Really? Yikes!!


-------- Original message --------
From: Mike Drew <mikeldrew at aol.com>
Date: 1/30/21 9:56 AM (GMT-08:00)
To: "Himes, Terry (US 397C)" <terry.himes at jpl.nasa.gov>
Cc: De Tomaso Forum <detomaso at server.detomasolist.com>
Subject: Re: [EXTERNAL] [DeTomaso] Gr4 Pantera at Le Mans video

Terry,

The front end of the car is subject to lift when the hood is latched—it lifts the whole car up at speed. When it’s unlatched the hood aerodynamically floats, with equal pressure above and below. This is why it raises higher when the airspeed is higher.

The guys who ran Silver State would prop the front hood up a fixed amount and some ran with the decklid unlatched. The decklid would also float, preventing rear-end lift.

Things got interesting when the car spun 180-degrees....

Mike

Sent from my iPad

> On Jan 30, 2021, at 08:17, Himes, Terry (US 397C) <terry.himes at jpl.nasa.gov> wrote:
>
> Hmmm?  Dunno 'bout that. Wouldn't the raised hood cause a hydraulic effect? Disrupting the flow
> of air.
>
> "A Purple Heart proves you were smart enough to hatch a plan,
> stupid enough to try it and lucky enough to survive!"
>
> Terry W. Himes
> JPL Jet Propulsion Laboratory
> Deep Space Exploration – Mission Operations
>
> Dawn Spacecraft Team
> Europa Lander Science Support Team
> TGO Sequence Lead
> MEX Sequence Lead
> Odyssey Sequence Team
> Spitzer Space Telescope Data Team
>
> Phone: (818) 393-6261
> Cell:     (818) 653-8213
> thimes at jpl.nasa.gov
>
>
>
> On 1/29/21, 11:23 PM, "DeTomaso on behalf of Mike Drew via DeTomaso" <detomaso-bounces at server.detomasolist.com on behalf of detomaso at server.detomasolist.com> wrote:
>
>    Guys,
>
>    From Le Mans Classic in 2018, a great video of the ex-Herbert Muller factory Gr4 Pantera. The team forgot to secure the front hood and it floats at speed, which is actually aerodynamically beneficial!
>
>    Great sound, great video....
>
>    https://urldefense.us/v3/__https://youtu.be/OdKqD_NfXFY__;!!PvBDto6Hs4WbVuu7!YDVYa2Ju_IYisZSMcqFPuJLju5rvlASwgdmhsCsTg_iwLD8pPaiPkbmY0IHyim1LY2z6Mg$
>
>    Mike
>
>
>    Sent from my iPad
>

-------------- next part --------------
   Euuu.  Great real-time test evidence. 180. Really? Yikes!!
   -------- Original message --------
   From: Mike Drew <mikeldrew at aol.com>
   Date: 1/30/21 9:56 AM (GMT-08:00)
   To: "Himes, Terry (US 397C)" <terry.himes at jpl.nasa.gov>
   Cc: De Tomaso Forum <detomaso at server.detomasolist.com>
   Subject: Re: [EXTERNAL] [DeTomaso] Gr4 Pantera at Le Mans video

   Terry,
   The front end of the car is subject to lift when the hood is
   latched--it lifts the whole car up at speed. When it's unlatched the
   hood aerodynamically floats, with equal pressure above and below. This
   is why it raises higher when the airspeed is higher.
   The guys who ran Silver State would prop the front hood up a fixed
   amount and some ran with the decklid unlatched. The decklid would also
   float, preventing rear-end lift.
   Things got interesting when the car spun 180-degrees....
   Mike
   Sent from my iPad
   > On Jan 30, 2021, at 08:17, Himes, Terry (US 397C)
   <terry.himes at jpl.nasa.gov> wrote:
   >
   > Hmmm?  Dunno 'bout that. Wouldn't the raised hood cause a hydraulic
   effect? Disrupting the flow
   > of air.
   >
   > "A Purple Heart proves you were smart enough to hatch a plan,
   > stupid enough to try it and lucky enough to survive!"
   >
   > Terry W. Himes
   > JPL Jet Propulsion Laboratory
   > Deep Space Exploration - Mission Operations
   >
   > Dawn Spacecraft Team
   > Europa Lander Science Support Team
   > TGO Sequence Lead
   > MEX Sequence Lead
   > Odyssey Sequence Team
   > Spitzer Space Telescope Data Team
   >
   > Phone: (818) 393-6261
   > Cell:     (818) 653-8213
   > thimes at jpl.nasa.gov
   >
   >
   >
   > On 1/29/21, 11:23 PM, "DeTomaso on behalf of Mike Drew via DeTomaso"
   <detomaso-bounces at server.detomasolist.com on behalf of
   detomaso at server.detomasolist.com> wrote:
   >
   >    Guys,
   >
   >    From Le Mans Classic in 2018, a great video of the ex-Herbert
   Muller factory Gr4 Pantera. The team forgot to secure the front hood
   and it floats at speed, which is actually aerodynamically beneficial!
   >
   >    Great sound, great video....
   >
   >
   [1]https://urldefense.us/v3/__https://youtu.be/OdKqD_NfXFY__;!!PvBDto6H
   s4WbVuu7!YDVYa2Ju_IYisZSMcqFPuJLju5rvlASwgdmhsCsTg_iwLD8pPaiPkbmY0IHyim
   1LY2z6Mg$
   >
   >    Mike
   >
   >
   >    Sent from my iPad
   >

References

   1. https://urldefense.us/v3/__https://youtu.be/OdKqD_NfXFY__;!!PvBDto6Hs4WbVuu7!YDVYa2Ju_IYisZSMcqFPuJLju5rvlASwgdmhsCsTg_iwLD8pPaiPkbmY0IHyim1LY2z6Mg$