I want a small ducktail to mount on the OEM spoiler !

[silver-S]

One more opinion, if you want it. The rounded ends look more like the styling of the rest of the car. There are no hard edges or flat surfaces anywhere else in the car's design, so having them on the spoiler looks out of place to my eye. In fact, I would round the edges of the rounded edge design!

[Nine8Six]

Hello derfo

I have a feeling it is a tad too late to pass on ideas but will give it a shot anyway. Perhaps one day you’ll handcraft more of those spoilers so I am all hoping for these ideas to be taken into consideration. I am one that believe Rick had a brilliant idea to start this thread. Spoilers are getting hard and harder to find these days so your help and amazing workmanship is much appreciated.

It would be pretentious to say that the attached spoiler is better than any others on the market however this is the design that would get me to swap the one I have in a flash. Some comments below:





^ The top arch (radius) would need to be exactly as the one from the rear bumper. Both in rear view and bird view. Unlike the one I currently have on my car atm which is a totally different radius when looking from any angle. It really annoys my eyes and I'm sure others can see it - unconsciously :/




^ In this picture I’ve omit the fillets on the side profiles of the spoiler so you can better see the actual side profile. The concave area would essentially be under the spoiler instead of above like most aftermarket spoiler currently on the market. The top is a simple organic flow-curve which I’m hoping will support aerodynamics (it should, according to my non-existent wind tunnel results).

Source file available: I am happy to supply this design in a solid model file format (*.IGS) so you can get someone locally to precisely CNC it out of a block of high density foam for mold forming. It would need to be scaled to the exact dimensions by your CNC contractor and yourself. This is something I haven’t done and sadly won’t have time to do. I am effectively fully over-booked for the next coming 24months (minimum) so i would be great if someone like yourself would take the challenge eventually. Perhaps after you’ve completed the one you are doing now

Thanks for your time and consideration

[Fintro11]

Originally Posted by Nine8Six

Hello derfo

I have a feeling it is a tad too late to pass on ideas but will give it a shot anyway. Perhaps one day you’ll handcraft more of those spoilers so I am all hoping for these ideas to be taken into consideration. I am one that believe Rick had a brilliant idea to start this thread. Spoilers are getting hard and harder to find these days so your help and amazing workmanship is much appreciated.

It would be pretentious to say that the attached spoiler is better than any others on the market however this is the design that would get me to swap the one I have in a flash. Some comments below:





^ The top arch (radius) would need to be exactly as the one from the rear bumper. Both in rear view and bird view. Unlike the one I currently have on my car atm which is a totally different radius when looking from any angle. It really annoys my eyes and I'm sure others can see it - unconsciously :/




^ In this picture I’ve omit the fillets on the side profiles of the spoiler so you can better see the actual side profile. The concave area would essentially be under the spoiler instead of above like most aftermarket spoiler currently on the market. The top is a simple organic flow-curve which I’m hoping will support aerodynamics (it should, according to my non-existent wind tunnel results).

Source file available: I am happy to supply this design in a solid model file format (*.IGS) so you can get someone locally to precisely CNC it out of a block of high density foam for mold forming. It would need to be scaled to the exact dimensions by your CNC contractor and yourself. This is something I haven’t done and sadly won’t have time to do. I am effectively fully over-booked for the next coming 24months (minimum) so i would be great if someone like yourself would take the challenge eventually. Perhaps after you’ve completed the one you are doing now

Thanks for your time and consideration

Hey Fred with your fancy computer simulators can't you simulate the car in a wind tunnel for us ? :P

[derfo]

Originally Posted by Nine8Six

Hello derfo

Source file available: I am happy to supply this design in a solid model file format (*.IGS) so you can get someone locally to precisely CNC it out of a block of high density foam for mold forming. It would need to be scaled to the exact dimensions by your CNC contractor and yourself. This is something I haven’t done and sadly won’t have time to do. I am effectively fully over-booked for the next coming 24months (minimum) so i would be great if someone like yourself would take the challenge eventually. Perhaps after you’ve completed the one you are doing now

Thanks for your time and consideration

Hello Nine8Six (Fred)

Me Fred Too. Tasteful design. It looks really good, pleasing to the eye. All I need to do this is what you have put on your post, the photos. I can work from there. I may do this after mine. Thanks for the time and effort you put into this.

[Nine8Six]

Originally Posted by derfo

Hello Nine8Six (Fred)

Me Fred Too. Tasteful design. It looks really good, pleasing to the eye. All I need to do this is what you have put on your post, the photos. I can work from there. I may do this after mine. Thanks for the time and effort you put into this.

Thanks for considering

I bet it is appealing to your eyes, it’s the same as yours Just upside down (no downforce). The idea was to keep the flow from the back bonnet going really. Speed limits here are 80km/hrs max so downforce is not a mandatory feature let’s just say. Aerodynamics was more appealing in my case.

I may just grab yours, slice off the corners with a laser, and finally get rid of the now fuggly 'wing' on the back of my car. Really starting to hate it in fact... got to go.

I think you nailed it spot-on with that little ducktail (thanks to Rick also!). Keep us updated

[VGM911]

Originally Posted by Nine8Six

Thanks for considering

I bet it is appealing to your eyes, it’s the same as yours Just upside down (no downforce). The idea was to keep the flow from the back bonnet going really. Speed limits here are 80km/hrs max so downforce is not a mandatory feature let’s just say.

What if your design creates lift? Without testing, how might you know one way or another?

[Nine8Six]

lolll it actually can. Using nastran's solvers that are installed by default but would need to mesh the car and spoiler entirely. Takes minimum a day; I accept visa & mastercard

Think this one has it all, derfo's features copied into also... just to make sure he considers or at least look at the design. Fingers crossed X

[Van914]

Great looking spoiler Fred.
Van

[Ben006]

It looks very nice !

Can you take pictures to see how it looks as a whole ?

Ben.

[derfo]

Originally Posted by Ben006

It looks very nice !

Can you take pictures to see how it looks as a whole ?

Ben.

Hello Ben006

As soon as I have one made out of the mold and fitted on my car there will be lots of photos to look at, from a few angles.

[Nine8Six]

I can trow in more renderings showing a clearer representation of the full '40' degree slope if needed.

(lolllll I can hear screams... no no no NO more f n renderings, pleaseeeee)

[VGM911]

I'm not a designer or engineer. However, I do remember that the early Audi TT experienced high- speed stability problems that necessitated the installation of a rear spoiler to ensure high-speed stability by reducing lift on the rear axle.

I assume that Porsche included a rear spoiler on the Boxster (which deploys at 75 mph) to ensure high-speed stability due to lift issues. It certainly wasn't installed to improve the car's looks!

All I'm saying is that Boxster owners should be wary about installing aerodynamic devices that may destabilize the car by increasing lift at the rear. If the maker of these devices can't measurably determine the lift or downforce characteristics of these spoilers, then I (for one) will avoid them.

[Nine8Six]

You are 100% correct and I have zero arguments to put up here. In fact laws are specifically designed to prevent this from happening - under NO circumstance you and I both are allowed (legally) to modify a vehicle which is dept of transport approved to use on public roads. Some countries enforce this policy more than others (e.g. I have to swap my aftermarket wheels before doing my car inspection every years here, those are no go. They do actually like my aftermarket headlights a lot however).

I think we are all adults here and understand the consequences of modifying our cars wisely (well, I hope). If you have concerns or not 100% sure with parts/mods you buy from various suppliers then, best advised stick to DOT "policy regulations". No point scrubbing these details on this forum imo

Let's keep the spirit of the ducktail thread!!!

[koosh]

personally i like the rounded edge however i would be happy with either.
one question, if you are making an HD foam and fibreglass covered part, will it be possible to sand the square edges down to curved should we decide too without going through the glass into the foam? or would we then need to recover the part in fibreglass?

also out of interest what are you making the parts out of? it seems you managed to knock that little curved section up fairly simply?

[derfo]

Originally Posted by koosh

personally i like the rounded edge however i would be happy with either.
one question, if you are making an HD foam and fibreglass covered part, will it be possible to sand the square edges down to curved should we decide too without going through the glass into the foam? or would we then need to recover the part in fibreglass?

also out of interest what are you making the parts out of? it seems you managed to knock that little curved section up fairly simply?

Hello koosh

I could reinforce the ends at the corners to accommodate those who want to alter the spoiler or I may make two molds, one round one straight.

The base material for the pattern is thin ply and body filler (bondo US).

I will keep the forum informed as to were I am up to with the mold.

[silver-S]

Ducktail designers, please take note: the incoming standards require space for a P O R S C H E logo on the rear surface. Please modify your designs to accomodate this new standard. Thank you.

[Nine8Six]

Originally Posted by silver-S

Ducktail designers, please take note: the incoming standards require space for a P O R S C H E logo on the rear surface. Please modify your designs to accomodate this new standard. Thank you.

I think you gave the 986 rear bumper a whole new usuage

Modded as requested. Economical version of it (half) lollll Thank you Derfo for integrating this in the next, next, round of your spoiler productions

[pony13ca]

Originally Posted by Nine8Six

I think you gave the 986 rear bumper a whole new usuage

Modded as requested. Economical version of it (half) lollll Thank you Derfo for integrating this in the next, next, round of your spoiler productions

Now that is sweet!!

[Nine8Six]

Originally Posted by pony13ca

Now that is sweet!!

Oh hang on mate, that was just a warm up! Can do this thing all day long, someone just need to tell me when to stop lolll

Rendering another atm... for those 2020 futurist and LED lovers

Edit: pic added, and I am having a hell of a hard time to visually represent the third-brake light "glass". The clear brake light red stuff I mean

Picture this illuminated late in the evening with the P lettering blacked out lolll There some nice boxstery curves I think



Edit 2: Nah, sorry, can't do good lookin glass. Tried. Gives a ruff idea anyway... if anyone wants to integrate this stuff in their production (Derfo, hope your reading this lolll)

[eicheldp]

Originally Posted by Nine8Six

Oh hang on mate, that was just a warm up! Can do this thing all day long, someone just need to tell me when to stop

Fred,
How about something similar to your wind deflector with edge lighting?