Thanks! Since installing a 4-1 header in my 2009 MX5, the cabin gets much hotter. I'm the same, after being retired for 7 years, finding something else to do is a challenge!
Reverse naca ducts have been used on hoods for a long time. I believe 280zx turbos actually came factory with one above the fuel rail to prevent vapor lock.
Is your whole underside of your car flat bottomed with a diffuser at the rear? If so I would think that turbulent air would disrupt the airflow under the car. In that case I would use the NACA in a fender. Just finished reading Adrian newey's book and I learned all kinds of insights on on aerodynamics as applied to auto racing.
@@RuskiWeldFab Newey stressed in the book that keeping the air as smooth as possible was paramount to efficient downforce. Thats the reason they started installing aerofences on F1 cars to keep the turbulent air from the inside of tire going under the car and forcing it away from the body in order to maintain efficient and consistent downforce. Dumping the heat at the back of the car above the diffuser would be ideal as it would act like a blown diffuser. Im not an engineer but I was a racer in my 30's and do grasp most if the concepts. Read Adrian Newey's book. It mechanical/aero engineering in layman's terms and very insightful
@@RuskiWeldFab thats the one. Its a biography as well as tech aspects of every car he ever built. I read it twice I liked it so much. All the best in your racing! If you can't be safe be fast!
2 things: 1) if the plastic box had been vented with inside air, the smoke would have evacuated much quicker. 2) the curvature inside of the duct wasn't curved enough. It should have an airfoil-like curve.
I'm sure I've seen a few production cars with same idea to pull hot air from the gearbox area.. I'm sure mclarens have them.. I mot some nice stuff lol
@@RuskiWeldFab ur test works as a proof but in practicality it works even better. the box with the smoke was closed so clean air had to get out and in from the naca duct and still it worked so next consider having a small hole in the box it would show a more significant realistic result
It actually makes a huge difference. The high speed(high speed = low pressure in Fluid dynamics) flow that's attached to body will breeze past it. The duct is in totally opposite directuln, so the air is not going to go inside the duct. Air flows from high pressure to low pressure(think vacuum/siphon). The air inside the car is at a lot slower speed therefore higher pressure. It's going to be sucked out with a lot of force. The venturi shape at end of duck accelerates the air coming out and makes it closely match the speed of air flowing over body before blending. This helps sustain the vacuum effect and makes turbulence negligible. At best a hole even with a fan would pull a little bit of air out. It would have to be hidden around a sharp curve(on low pressure side) that detaches the flow or have a shield right in front of it. Both cases would create a low pressure area around hole and divert the high energy attached flow. If he put a hole in same spot naca duct is at right now, it would move essentially 0 air at sufficient speed. In yaw in would likely push in air. He could have designed this slightly better. He should leave everything how it is but put lexan or sheet metal covering about the first half of the duct. That will allow air on body to stay attached longer, keep more air inside of duct that's then sped up by venturi, make venturi work better, decrease speed needed to start siphon, less air disturbance, less drag and more sideforce(surface area from side).
@@RuskiWeldFab haha I actually got to this video because of the new Ferrari F1 car reveal. If you look very closely at the corner their louvers on sidepod they are truncated and stretched naca ducts. Louvers work in generally the same way but cause much more disturbance and not as much suction. They create that shield I was talking about. I’ve never seen them like Ferrari has though.
Thanks! Since installing a 4-1 header in my 2009 MX5, the cabin gets much hotter.
I'm the same, after being retired for 7 years, finding something else to do is a challenge!
Right on!
I like your mythbusters style experiment to prove it in FACT works! you're always thinking outside the box!
Thank you! I wouldn’t call it thinking but acting 😂👍
Reverse naca ducts have been used on hoods for a long time. I believe 280zx turbos actually came factory with one above the fuel rail to prevent vapor lock.
Lotus 49-B 1968
If you would like to support my channel and purchase one of the hoodies ruskiweldmerch.company.site/
Is your whole underside of your car flat bottomed with a diffuser at the rear? If so I would think that turbulent air would disrupt the airflow under the car. In that case I would use the NACA in a fender. Just finished reading Adrian newey's book and I learned all kinds of insights on on aerodynamics as applied to auto racing.
Please tell me more!! Yes it’s nearly all flat.
@@RuskiWeldFab Newey stressed in the book that keeping the air as smooth as possible was paramount to efficient downforce. Thats the reason they started installing aerofences on F1 cars to keep the turbulent air from the inside of tire going under the car and forcing it away from the body in order to maintain efficient and consistent downforce. Dumping the heat at the back of the car above the diffuser would be ideal as it would act like a blown diffuser. Im not an engineer but I was a racer in my 30's and do grasp most if the concepts. Read Adrian Newey's book. It mechanical/aero engineering in layman's terms and very insightful
thank you for recommendation! is this the book? amzn.to/3s7KjYY
@@RuskiWeldFab thats the one. Its a biography as well as tech aspects of every car he ever built. I read it twice I liked it so much. All the best in your racing! If you can't be safe be fast!
2 things:
1) if the plastic box had been vented with inside air, the smoke would have evacuated much quicker.
2) the curvature inside of the duct wasn't curved enough. It should have an airfoil-like curve.
1) agree. But good enough as prove of concept.
2) see reply number 1 🫡
Welding's really coming on dude 👍
Sure is. thanks. 1.2mm ally was difficult!
@@RuskiWeldFab try .5 😡 heatsinks are everything with thin stuff
I'm sure I've seen a few production cars with same idea to pull hot air from the gearbox area.. I'm sure mclarens have them.. I mot some nice stuff lol
Yeah they all stole idea from me 😂
Got me thinking about a front splitter now. Don’t think a reverse naca duct would make any difference on mine though 😂 also I like dem hoodies 😉
I have 2 splitters for sale 😂😂😂
@@RuskiWeldFab ur test works as a proof but in practicality it works even better.
the box with the smoke was closed so clean air had to get out and in from the naca duct and still it worked so next consider having a small hole in the box it would show a more significant realistic result
I would like to use It fir cooling the gearbox.. It Is ok also?
this will be for you to find out. if used in proper orientation naca duct can cool anything you like.
Why do you use a wooden engine floor?
because cheap and easy! and its what is used on touring cars effectively.
@@RuskiWeldFab but is it hardwood? Of what wood because doesnt it catch fire?
Yes it’s hardwood marine ply. Coated with epoxy paint. If it catches fire, this should be least off your problems.
NACA DUCT Origami "sucks" if done correctly 👍😎
yap!
Love it great idea
Thanks!
if you want to see how i built my Flat floor and a splitter follow this link ua-cam.com/video/AxBiC7inGQw/v-deo.html
Круто!!! Аэродинамика очень интересная вещь) Подписка;)
Благодарю!
i doubt that the naca duct shape made a difference, a simple hole would have the same effect
would have been a very short video..
It actually makes a huge difference. The high speed(high speed = low pressure in Fluid dynamics) flow that's attached to body will breeze past it. The duct is in totally opposite directuln, so the air is not going to go inside the duct.
Air flows from high pressure to low pressure(think vacuum/siphon). The air inside the car is at a lot slower speed therefore higher pressure. It's going to be sucked out with a lot of force.
The venturi shape at end of duck accelerates the air coming out and makes it closely match the speed of air flowing over body before blending. This helps sustain the vacuum effect and makes turbulence negligible.
At best a hole even with a fan would pull a little bit of air out. It would have to be hidden around a sharp curve(on low pressure side) that detaches the flow or have a shield right in front of it. Both cases would create a low pressure area around hole and divert the high energy attached flow.
If he put a hole in same spot naca duct is at right now, it would move essentially 0 air at sufficient speed. In yaw in would likely push in air.
He could have designed this slightly better. He should leave everything how it is but put lexan or sheet metal covering about the first half of the duct. That will allow air on body to stay attached longer, keep more air inside of duct that's then sped up by venturi, make venturi work better, decrease speed needed to start siphon, less air disturbance, less drag and more sideforce(surface area from side).
Now that’s an explanation I can get on board with!!
I should clarify high speed = low pressurewhen not compressed. Air is treated as an non compressible at transonic speeds.
@@RuskiWeldFab haha I actually got to this video because of the new Ferrari F1 car reveal.
If you look very closely at the corner their louvers on sidepod they are truncated and stretched naca ducts. Louvers work in generally the same way but cause much more disturbance and not as much suction. They create that shield I was talking about. I’ve never seen them like Ferrari has though.