The twin overhead cams allow higher RPM without valve float, all toehr technology levels being equal. The rocker arms in a SOHC design add mass to the valve train that must be accelerated by the cam and decelerated by the valve springs. In general, SOHC is superior to pushrods for increased RPM, but still bows to DOHC, even with only two valves per cylinder.
because of the valve angles I'm guessing, 911 aircooled engines have SOHC with rockers but the valves look shorter on the 911 engines than the 917 engine (haven't seen a dismantled 917 engine in person, though)
El l motor de ciclo otto, mas potente del mundo!! porsche!! eres lo máximo!! y agradezco al o los profesionales que hicieron esta fomidable animacion computarizada en 3D!!!!
awesome work! congratulations! I used the same techique, in my pedal spinning animation, I rendered 180 frames in photoview moving the cage 2 degrees every time... and it's just hell boring, after that I mounted the frames in premiere cs5 ! In sw 2011 they integrated photoview in it and I hope you can render animations too! Check my chanel! :D
awesome work! congratulations! I used the same techique, in my pedal spinning animation, I rendered 180 frames in photoview moving the cage 2 degrees every time... and it's just hell boring, after that I mounted them in premiere cs5 ! In sw 2011 they integrated photoview in it and I hope you can render animations too! Check my chanel! :D
Can you make the animation in solidworks and have it rendered without having to stich it together with alot of individual renders?If so what software did you use?
I have photoview 360 and want to start makin animations like these and was hoping there is a beter way than lots of stills stitched together...a one button render even if it makes all the stills aslong as I dont have to!
Holy crap this is amazing! Did you use schematics or something? I made a 917K chassis on SW, but that's nothing compared to this! I'd give it 10 stars if I could.
I used mostly pictures that I found on the internet of a 917 engine being rebuilt, a couple of books about the 917 and photos I took at the Porsche museum in Stuttgart of the prototype 16 cylinder engine that was on display there a couple of years ago.
One of the books had a very useful cross section that appears to have been done at Porsche when the engine was originally being designed.
I for gear tooth profiles I followed ISO standards.
@DoriFord That would appear to have the wrong number of crank journals for a flat-12 engine. It has 9 main bearings and 8 offset sections (throws), which suggests either 8 or 16 cylinders. Judging by the location of the oil holes on the bearing surfaces, and their relative width to the mains, I surmise it is for an 8-cylinder engine. Also, looking at the throws, it is phased as two four-cylinder sets offset by 90 degrees. Cool pic, though.
@DoriFord On second glance, that is likely a 908 crankshaft. That had 9 main bearings, and opposing cylinders were on different crank throws, like on the flat-6 engines. Once Porsche went to the 12-cylinder layout, opposing cylinders shared throws, like in a V-configuration engine. (Hence, some call them 180-degree V-12s, not "flat" or "boxer" engines.) It makes the engine shorter, which matters when you have that much engine.
@MrJohannVegas well, I've found it on the website of some dutch company which manufactures billet crankshafts, so I think that it is a copy of an actual 908. Right, not 917, my bad.
Hmm so it looks like two flat-6 bolted together, cam gearing in the middle
ToRRenTzzz 1 month ago
Wo ... 2 Valve , Aircooled Engine .. and its soo Powerfull... and the sound !!! *_*
unclewilly2 2 months ago
WHY IS THERE SO MANY GEARS INSIDE??!!?!!?
orbitstrid3r 2 months ago
Great video - lovely work!
Diogeneze 2 months ago
ooops....typo..." all other technology levels being equal "
-markb
Diogeneze 2 months ago
@diegogpb and jsquared1013,
The twin overhead cams allow higher RPM without valve float, all toehr technology levels being equal. The rocker arms in a SOHC design add mass to the valve train that must be accelerated by the cam and decelerated by the valve springs. In general, SOHC is superior to pushrods for increased RPM, but still bows to DOHC, even with only two valves per cylinder.
-markb
Diogeneze 2 months ago
not using chains for the cams? interesting.
Ibringthetruth1 3 months ago
What is the purpose of the fan above the engine? Is it there to cool it?
LollerStormeR 5 months ago
@LollerStormeR
Yes, it is an aircooled engine, like 1998 and earlier 911s, the 356, 914, etc
jsquared1013 4 months ago
wonderful, but i dont understan one thing, why is it a DOHC? it has only 2 valvles per cylinder.
diegogpb 5 months ago
@diegogpb
because of the valve angles I'm guessing, 911 aircooled engines have SOHC with rockers but the valves look shorter on the 911 engines than the 917 engine (haven't seen a dismantled 917 engine in person, though)
jsquared1013 4 months ago
917 rules 246 mph in 1970 , amazing engine
baggyaxewound 7 months ago
El l motor de ciclo otto, mas potente del mundo!! porsche!! eres lo máximo!! y agradezco al o los profesionales que hicieron esta fomidable animacion computarizada en 3D!!!!
cartrachito 7 months ago
That is absolutely amazing. Great work. Must have taken ages...
911myporsche 8 months ago
Wow, I know nothing about engines but this nice !!!
cybershakey 9 months ago
awesome work! congratulations! I used the same techique, in my pedal spinning animation, I rendered 180 frames in photoview moving the cage 2 degrees every time... and it's just hell boring, after that I mounted the frames in premiere cs5 ! In sw 2011 they integrated photoview in it and I hope you can render animations too! Check my chanel! :D
robytryall 11 months ago
awesome work! congratulations! I used the same techique, in my pedal spinning animation, I rendered 180 frames in photoview moving the cage 2 degrees every time... and it's just hell boring, after that I mounted them in premiere cs5 ! In sw 2011 they integrated photoview in it and I hope you can render animations too! Check my chanel! :D
robytryall 11 months ago
Very Cool!
9freelandk 1 year ago
1 person was a Ferrari engineer trying to beat the 917
Silvestris420 1 year ago
Beautiful work Randy. German simplicity in action.
PaddyJHogan 1 year ago
Awesome!
klunk4real 1 year ago
Very impressive animation for a very impressive and badass engine. I like it.
No1snYpeslikme 1 year ago
Can you make the animation in solidworks and have it rendered without having to stich it together with alot of individual renders?If so what software did you use?
I have photoview 360 and want to start makin animations like these and was hoping there is a beter way than lots of stills stitched together...a one button render even if it makes all the stills aslong as I dont have to!
What do you think?
NeoWooptiDoo 1 year ago
How did you animate the images?
camdecoster 1 year ago
Holy crap this is amazing! Did you use schematics or something? I made a 917K chassis on SW, but that's nothing compared to this! I'd give it 10 stars if I could.
PukaMan 2 years ago 4
same here!
ottocars 2 years ago
I used mostly pictures that I found on the internet of a 917 engine being rebuilt, a couple of books about the 917 and photos I took at the Porsche museum in Stuttgart of the prototype 16 cylinder engine that was on display there a couple of years ago.
One of the books had a very useful cross section that appears to have been done at Porsche when the engine was originally being designed.
I for gear tooth profiles I followed ISO standards.
Rods and pistons are aftermarket available
mwp917 2 years ago
@mwp917 is there possible to create another one engine like this?
BrundukasLT 11 months ago
@mwp917 I have a pic of an actual Porsche 917 crank and to my surprise, it wasn't flat as I expected.
i39.tinypic dot com/v6rrmf.jpg
DoriFord 1 month ago
@DoriFord That would appear to have the wrong number of crank journals for a flat-12 engine. It has 9 main bearings and 8 offset sections (throws), which suggests either 8 or 16 cylinders. Judging by the location of the oil holes on the bearing surfaces, and their relative width to the mains, I surmise it is for an 8-cylinder engine. Also, looking at the throws, it is phased as two four-cylinder sets offset by 90 degrees. Cool pic, though.
MrJohannVegas 2 weeks ago
@DoriFord On second glance, that is likely a 908 crankshaft. That had 9 main bearings, and opposing cylinders were on different crank throws, like on the flat-6 engines. Once Porsche went to the 12-cylinder layout, opposing cylinders shared throws, like in a V-configuration engine. (Hence, some call them 180-degree V-12s, not "flat" or "boxer" engines.) It makes the engine shorter, which matters when you have that much engine.
MrJohannVegas 2 weeks ago
@MrJohannVegas well, I've found it on the website of some dutch company which manufactures billet crankshafts, so I think that it is a copy of an actual 908. Right, not 917, my bad.
DoriFord 2 weeks ago
Amazing work... Thanks for posting it up!
Regards - Randy
rvandeloo 2 years ago