Designing FT-1 inspired wing- Looking to see if there is demand as well as suggestions for improvement

[TheMaker]

As the title states, im currently in the process of designing this wing. Before making suggestions, keep in mind the point was to stay as true to the original design of the FT-1 wing as possible while making it applicable to the actual production car.

Ive been using as much technical information as i could gather to design components that should produce real world results, though no testing has been done at this point.

At this stage im just looking to see if there is any interest in something like this or if there is anything that can improved and so on.

So far we have a span on 1425mm approx,
Chord length of 265mm,
290mm height off the tip of the ducktail to the highest point of the spoiler deck,
AoA of 15 Deg

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[TheMaker]

or…. Do i chop off the ends and make it a combo of the ft1+ cgt wing when fully extended? For this id likely need to scale the wing to make the chord longer to compensate for shorter span.

 

[Sup2]

Have you considered having the mounting points where the anniversary edition attaches so you don’t have to cut, drill on composite underside of hatch?

 

[razorlab]

Have you considered having the mounting points where the anniversary edition attaches so you don’t have to cut, drill on composite underside of hatch?

Any wing that creates any downforce will destroy the hatch when mounted in that location.

 

[i3igpete]

The lower the wing, the closer the airflow's downdraft matches the rear glass.

The middle of the glass is about 20 deg when you measure with an angle finder. Since your wing is so low, that means the oncoming air will already have a 10 to 15° angle to it.

Giving it another 15° is a recipe for stall. The BEST open source profiles can only survive ~20 degrees without stalling. Since the design is non-adjustable, I would err on the side of caution and set it to 5 deg.

 

[TheMaker]

The lower the wing, the closer the airflow's downdraft matches the rear glass.

The middle of the glass is about 20 deg when you measure with an angle finder. Since your wing is so low, that means the oncoming air will already have a 10 to 15° angle to it.

Giving it another 15° is a recipe for stall. The BEST open source profiles can only survive ~20 degrees without stalling. Since the design is non-adjustable, I would err on the side of caution and set it to 5 deg.

I can definitely reposition the wing to 5 degrees. Currently its setup for m8 bolts and larger diameter bolt holes need more rotation for clearance. I could go down to m6’s and squeeze some adjustment out of it. I could neutralize it and give it 3 potential slots for 3,6,9 degrees

 

[TheMaker]

Ive adjusted the Wing's natural angle to 7deg
Span is 1300mm
Chord 280mm
Height is increased to 305mm off the trunk (highest point to highest point)
The actual wing profile is thicker than the previous
The shape is more influenced by the trunk

Things to work on:
- endplates
- the entire support structure was carried over from V2. obviously it doesn't work with this profile and that's visible. I have something in mind. its a bit experimental but should stand out from the crowd.
- adjustability to go +/- 2deg.

 

[TheMaker]

Updated mounts

 

[rottmore]

The lower the wing, the closer the airflow's downdraft matches the rear glass.

The middle of the glass is about 20 deg when you measure with an angle finder. Since your wing is so low, that means the oncoming air will already have a 10 to 15° angle to it.

Giving it another 15° is a recipe for stall. The BEST open source profiles can only survive ~20 degrees without stalling. Since the design is non-adjustable, I would err on the side of caution and set it to 5 deg.

Christ, wish I were 2% as smart as you with aero. You probably can run a CFD analyses just by looking at things eh.

 

[TheMaker]

Christ, wish I were 2% as smart as you with aero. You probably can run a CFD analyses just by looking at things eh.

This was extremely helpful lol… i dug a little deeper into the rear glass angle and i was off on my design. For the supra 5-7deg is kind of the sweet spot with an additional 2-3 deg for aggressive aero needs

 

[i3igpete]

The supra isn't some kind of magical snowflake. Fastbacks have been around for 50 years.

You probably can run a CFD analyses just by looking at things eh.

 

[Rensuhlo]

I could neutralize it and give it 3 potential slots for 3,6,9 degrees

Damn she fine

 

[rottmore]

The supra isn't some kind of magical snowflake. Fastbacks have been around for 50 years.

Thank god for pictures. Something my small brain can understand.

 

[TheMaker]

So with the diameter of the bolt that attaches the deck mount to the riser, it would have been impossible to make the mounts adjustable.

I just made 3 separate risers that give the wing 7, 8.5 and 10deg of AoA.

Originally i had in mind to print the the deck out of PET-cf and the mounts out of PA-cf. I might just give out the risers as a STEP file to anyone who buys.

Still to be done:

- figure out where the bolts need to go into the trunk/trunk mounts
-make bolts arrangement for the deck mounts to hold the deck in place (3m panel bond or something like that should also be applied)
-might make endplates, aesthetically it looks better without but i understand the performance impact they have

-TEST FIT … need a donor car or at least a rear hatch

 

[CWO5805]

Any wing that creates any downforce will destroy the hatch when mounted in that location.

Genuinely curious as to why? Is this true or just what people assume? Again. Not trying to argue. Just wondering

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