Looks better. The only suggestion I would offer, and I'm not sure how easy it would be to execute or whether or not everyone here agrees with me, but I would like to see it blended into the taillight better. If you look at the 981 there is no height discrepancy between the spoiler and the taillight where they meet. Yours looks like it sticks up about an inch or so. Other than that I like it. Also, for the sake of continuity, maybe make it more closely follow the angle of the trunk seam when viewed from the top? (5th pic in your last post)

Very nice with the rounded edges !!!

Awesome! I look forward to seeing the painted final. Your ability is amazing.

Wow nice ......Yes that's it getting there the hard part is gentlely softening the side profile edges as well so it all looks cohesive...and trailing edge tangent to side edge relief....so no nubs are present in the final. Yes spacing with boot lid and tail light contours will make all the difference

Very nice work....not sure how you are managing this by hand? You could easily give up your day job and start shaping custom surf boards for a living!!

I would think you would have to scan it and final shape in an SM package then CNC or print for a symmetrical end product???

Anyway looks great!

986 Spoiler
 

Hello everybody

I have just put a couple of photos on to show the line I followed for the spoiler.

No SM package or CNC here, all hand crafted by myself.

986 Spoiler
 

Hello everybody

I have just put a couple of photos on to show the line I followed for the spoiler.

http://986forum.com/forums/uploads01...1453587491.jpg

http://986forum.com/forums/uploads01...1453587700.jpg

Why not put some end caps? Small, tasteful, and that would sit just above the paint?

Sent from my SAMSUNG-SM-G900A using Tapatalk

Gotcha. Didn't realize you had been using the stock spoiler as a guide.

After studying the pics I'm torn between the flat side vs. rounded. The flat side to my eye looks finished and transitions well from the " fat " side to the thinner trailing edge. The rounded looks good but the transition from fat side to thin trailing edge is just a little off. Maybe it's just me and maybe some of that would go away with paint color vs. primer. Also I think the flat side carries out the angle of the OEM spoiler top better than the rounded. Or I could be full of crap :D . I would have no problem installing either one on my car and will continue to follow this thread.

I think the same thing. Maybe pics from further back will help?

Derfo it's quite possible that all of our feedback may muddy the waters on what you will ultimately build. We all have an opinion and you can't custom build each one unless that's what you want to do. The more I think about it for you it might be easier to build your mold to the flat side pattern. If there is maybe some extra glass in that area of your layup the end user can customize as they seem fit. My guess is most of us will have a pro install these so end user finish to taste will be possible. I can sand/glass a completed part no problem but I don't have the skill set to build it from scratch. The way I look at it get me 95 % of the way there I'll take it from there. As long as it fits the top blade well that is probably the hardest part. I'm not trying to sway you one way or the other as I have said I can live with either. But if you listen to all of us you'll end up with 25 molds :D

Excellent work! Looks great.

986 Spoiler
 

Hello rfuerst911sc

You are on my wave length. Just showing what it would look like rounded and getting some feed back. I am going to make the mold from the yellow pattern with the straight edges. The rounding off can be done by each individual or by their refinishing shop.
I am going forward with this now so I will keep the forum posted. Its going to be two or three weeks. Thanks for all the good comments everybody.

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!

Arrgg one day too late :/ next round I hope
 

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:

http://986forum.com/forums/uploads01...1453680980.jpg

http://986forum.com/forums/uploads01...1453682198.jpg

^ 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 :/


http://986forum.com/forums/uploads01...1453681000.jpg

^ 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

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

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

Great looking spoiler Fred.
Van

It looks very nice !

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

Ben.

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

It would cost me much less in gasoline isn’t it! Speaking for myself only, I drive a little 200hp roaster/Boxster car on speed-limited public roads only. It just got to look good lolll

Specific to your question; I don’t really care mate. And that answer is pretty consistent with what our friends at Porsche R&D and MechEng dept formulated already. You can do quick math using the gravitational force formula where your car’s weight being y ;)

Google “aerodynamic force formula”, now that formula overrides gravitational force for mass traveling at speeds at & above 120km/hr. That very same old physic formula our good friends at Porsche uses. Certainly something to be concerned about, now that I don’t deny. Did read once or twice that gravitational force starts to get pretty messed up when mass travels at speed. A fact lolll

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)

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.

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!!!

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?

986 Spoiler
 

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.

986 Spoiler
 

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.

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.

http://roa.h-cdn.co/assets/16/04/160...3851202-q3.jpg

Not sure if mentioned previously. Just got the feb 2000 panorama mag last night. Don't ask. Performance products was advertising a full duck which appeared to replace the back hood and covered the auto spoiler. It was 900 back in 2000.

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 :cheers:

<a data-flickr-embed="true" href="https://www.flickr.com/photos/139477235@N07/24026390843/in/dateposted-public/" title="Spoiler_01"><img src="https://farm2.staticflickr.com/1600/24026390843_ab23b11c0e_b.jpg" width="1024" height="576" alt="Spoiler_01"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>

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

<a data-flickr-embed="true" href="https://www.flickr.com/photos/139477235@N07/24358926390/in/dateposted-public/" title="Spoiler_02"><img src="https://farm2.staticflickr.com/1659/24358926390_1e0be63210_b.jpg" width="1024" height="576" alt="Spoiler_02"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>

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)

<a data-flickr-embed="true" href="https://www.flickr.com/photos/139477235@N07/24359059020/in/dateposted-public/" title="Spoiler_03"><img src="https://farm2.staticflickr.com/1635/24359059020_7c0eb88659_b.jpg" width="1024" height="576" alt="Spoiler_03"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>

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

Looks better than Porsche factory man......they might "bring you in" if you keep this up:D

Don - nice one... concept does not come up as off right now but if I think of something I'll certainly annoy with a few more visuals on that. Geez, can you imagine a fully poly-carbonate spoiler with a builtin laser-lit 3D Porsche lettering?! That's is so not 2020... more like 2099 sounding to me ;)

lolllll "The Thin Red Line" isn't it :D

<a data-flickr-embed="true" href="https://www.flickr.com/photos/139477235@N07/24361154220/in/dateposted-public/" title="Spoiler_04"><img src="https://farm2.staticflickr.com/1699/24361154220_ae40a1eafd_b.jpg" width="1024" height="576" alt="Spoiler_04"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>

Sitting here enjoying some coffee and looking over all the pics. Fred the design you show is very pleasing to the eye and has a shape to it that matches the nice round butt of the 986 :D . Derfo's design also compliments the rear look of the car but in a slightly different way. One is not better than the other in my opinion just different. I think once Derfo gets one on his car and painted to match it will really show what his approach is all about. When looking at the butt of my car I do NOT want the eye to go directly to the spoiler/duck tail, instead I want the eye to take in the entire landscape. That's why in my original post that started all of this that I wanted a small duck tail. Pleasing to the eye, not intrusive just a minimal enhancement. My car is arctic silver and after installing the duck tail I hope to do two ghost stripes from the front GT3 bumper to the back GT3 TEK diffuser. I think that will look great and help pull everything together to make it all flow. Time will tell if I am correct :p

That Boxstery-round butt spoiler you see would cost over $1,000 and that assuming 1,000 units would be be pre-sold even before someone thinks production. Not called a ducktail anymore... more like a rip-off lolll I'm sure you've already guessed it was just meant a killing time while we are all impatient waiting for Derfo's spoiler to come out! Fun stuff

I for one may be getting the MKI of his spoiler. I plan to get rid of the tower-looking 747 style wing I currently have on my car and his will be just fine for my taste. Anxious to know if he plans on rounding the corners however. Either ways, for me that's not a huge problem as I have many means to modify that here (either by hands or using a laser cutter, etc).

Cool thread Rick. Hopefully Derfo will start his own thread when ready, hopefully in the DIY section?

rounding the edges/corners would fit my taste, too...-->@ Fred: the other "thin red line" style is REALLY nice
Kind of like a new 718 hybrid style.
http://986forum.com/forums/uploads01...1454234503.jpg
But I tell you guys, when the 986 pushes that original brick-wall style wing up...looks kinda raw...i just love it, still. So I would need a 718 "ducktail" hybrid wing...where the old brick wing can still push through. :D