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Search took 0.01 seconds. Search: Posts Made By: Cycle
Forum: Aerodynamics 08-11-2015, 10:58 PM
Replies: 29
Views: 3,880
Posted By Cycle
For instance, the main member of my frame: ...

For instance, the main member of my frame:

module MainMember(){
// Main member: 2100mm length, 50.8mm diameter, 3mm wall, Part#:1
color([0.9,0.9,0.9]){
rotate([0,90,0]){
...
Forum: Aerodynamics 08-02-2015, 02:45 PM
Replies: 21
Views: 5,590
Posted By Cycle
Another all-time high, both for fuel efficiency...

Another all-time high, both for fuel efficiency and miles-per-tank:
94.478 MPG
237.8 miles

The tungsten disulfide takes time to coat all the moving parts, so I think this improvement over the...
Forum: Aerodynamics 07-27-2015, 08:08 AM
Replies: 39
Views: 8,501
Posted By Cycle
I was under the assumption that according to the...

I was under the assumption that according to the Bernoulli equation, the stagnation point is where the forward motion of the vehicle has caused the air to come to rest (or even reverse direction and...
Forum: Aerodynamics 07-27-2015, 02:30 AM
Replies: 39
Views: 8,501
Posted By Cycle
For the insulation... would it be enough to have...

For the insulation... would it be enough to have the duct made of material that doesn't transfer heat well (fiberglass molded into the shape of a duct but made an integral part of the body panels),...
Forum: Aerodynamics 07-27-2015, 12:26 AM
Replies: 39
Views: 8,501
Posted By Cycle
Found this... very interesting concept: ...

Found this... very interesting concept:
https://en.wikipedia.org/wiki/Meredith_effect

And the Meredith paper:
http://naca.central.cranfield.ac.uk/reports/arc/rm/1683.pdf

I've got some reading...
Forum: Aerodynamics 07-25-2015, 03:42 PM
Replies: 39
Views: 8,501
Posted By Cycle
That's sort of what my idea entails: ...

That's sort of what my idea entails:
http://i.imgur.com/d4E7cgN.gif

The cross-ducting is so that when the bike's hit with a side-wind, it'll channel some of that air to the opposite side of the...
Forum: Aerodynamics 07-21-2015, 09:04 PM
Replies: 21
Views: 5,590
Posted By Cycle
The timer itself is tiny. I can hold it in one...

The timer itself is tiny. I can hold it in one hand, and it weighs only a few ounces. I'm not sure how big the internal backup battery is, but it needn't be very large, it's essentially a digital...
Forum: Aerodynamics 07-21-2015, 06:43 PM
Replies: 21
Views: 5,590
Posted By Cycle
An update on FrankenYager... the hybrid ceramic...

An update on FrankenYager... the hybrid ceramic bearings are installed, the new taller rear gears are installed and worn-in, I've put 8.5 grams of 0.6 micron tungsten disulfide in the engine oil and...
Forum: Aerodynamics 07-21-2015, 01:51 PM
Replies: 39
Views: 8,501
Posted By Cycle
I've read through so many of them, I'm unsure if...

I've read through so many of them, I'm unsure if this is the exact one I referenced, but it's pretty easy to Google for any number of studies, just search for "aerodynamic drag reduction by energy...
Forum: Aerodynamics 07-21-2015, 01:46 AM
Replies: 39
Views: 8,501
Posted By Cycle
Electroaerodynamic drag reduction...

I've been reading up on this, and supposedly they've achieved drag reductions of up to 96% at supersonic speeds, but only about 10% at subsonic speeds. Still, a 10% reduction in drag is pretty good,...
Forum: Aerodynamics 07-21-2015, 01:31 AM
Replies: 5
Views: 1,308
Posted By Cycle
Aerodynamic mods and their effects, and dimples!

This PDF file tracks what changes were made and the effect upon CD:
http://www2.warwick.ac.uk/fac/sci/wmg/research/lcvtp/presentations/ws12finalpresentation120221.pdf

This one examines drag...
Forum: The Unicorn Corral 06-09-2015, 09:52 PM
Replies: 8
Views: 3,571
Posted By Cycle
Centrifugal oxygen enrichment...

What's your take on this:

https://www.google.com/patents/US6363923

A 15 cm diameter cylinder, spinning at ~80,000 RPM or more, driven like a turbo off exhaust gasses, used to centrifugally...
Forum: The Unicorn Corral 04-15-2015, 10:40 PM
Replies: 88
Views: 16,478
Posted By Cycle
Not that this is the appropriate forum to discuss...

Not that this is the appropriate forum to discuss this, but here goes...



Just love how easy it is to attract the nitpickers. LOL

Now answer the questions, please:
By what mechanism does a...
Forum: The Unicorn Corral 04-15-2015, 05:07 PM
Replies: 88
Views: 16,478
Posted By Cycle
Depends upon the engine's design parameters what...

Depends upon the engine's design parameters what its exhaust gas analysis graph will look like.

Typically, when you go richer than stoichiometric, your UBHC and CO increases, but your NOx...
Forum: Motorcycles / Scooters 04-10-2015, 10:45 AM
Replies: 60
Views: 21,366
Posted By Cycle
Hi, Jan. Yeah, the sprag I've got in mind is...

Hi, Jan.

Yeah, the sprag I've got in mind is plenty stout for the application:

Stieber ALF2D2 30-500
ALF2D2 & ALF4D2 Types | Self-Contained Freewheels | Stieber Clutch...
Forum: Motorcycles / Scooters 03-30-2015, 02:22 AM
Replies: 81
Views: 15,473
Posted By Cycle
I've got a Prius cam timing map. See the attached...

I've got a Prius cam timing map. See the attached image. If you need the full-sized image, let me know.
Forum: Aerodynamics 03-15-2015, 08:07 PM
Replies: 21
Views: 5,590
Posted By Cycle
Scooter efficiency and aerodynamics...

Hi, all. New poster, although a long-time reader.

Ok, so I'm reworking my scooter, a 2010 Kymco Yager GT 200i (174.5 cc, liquid cooled, fuel injected, single-cylinder, 4-stroke engine) for better...
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