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Search took 0.09 seconds. Search: Posts Made By: Grant-53
Forum: Events & Meet-ups 03-04-2024, 07:48 PM
Replies: 17
Views: 1,834
Posted By Grant-53
The weather here has been exceptionally warm this...

The weather here has been exceptionally warm this year.
Forum: Alternative Transportation 12-04-2023, 02:12 PM
Replies: 41
Views: 1,623
Posted By Grant-53
I don't recall exactly when Sweitzer was bought...

I don't recall exactly when Sweitzer was bought and moved out of state. I'd say post 9/11.
Forum: Alternative Transportation 12-01-2023, 03:12 PM
Replies: 41
Views: 1,623
Posted By Grant-53
Snow varies in its depth and properties so if you...

Snow varies in its depth and properties so if you are from Buffalo, Colorado, or Hudson Bay you will know the names of different snows. The cheapest solution would be a ski rack on a mountain bike. ...
Forum: Aerodynamics 10-05-2023, 05:22 PM
Replies: 18
Views: 1,081
Posted By Grant-53
To study fluid mechanics and boundary layers most...

To study fluid mechanics and boundary layers most books require a knowledge of differential equations. On my bicycle fairings I start with 5:1 aspect ratio and a Kamm reduction of 10-15% of length. ...
Forum: Motorcycles / Scooters 08-25-2023, 11:10 AM
Replies: 47
Views: 3,153
Posted By Grant-53
I found that windshields attached to the steering...

I found that windshields attached to the steering forks do cause steering inputs from crosswinds. It is a function of the lateral fin area, side drag coefficient, and the distance from the center of...
Forum: EcoModding Central 05-01-2023, 05:30 PM
Replies: 153
Views: 5,635
Posted By Grant-53
For several years I have volunteered at the Green...

For several years I have volunteered at the Green Grand Prix. I did scoring again this year. The top production vehicle got 148 e-mpg at 46 mph. I also regularly read the SAE publications. No...
Forum: Motorcycles / Scooters 02-19-2023, 08:52 PM
Replies: 26
Views: 3,055
Posted By Grant-53
Some states have a minimum seat height laws. A...

Some states have a minimum seat height laws. A 15% reduction of body shell to a Kamm effect tail would help with the crosswinds. Make sure the center of mass is ahead of the center of pressure.
Forum: Forum News & Feedback 08-26-2022, 10:25 AM
Replies: 20
Views: 4,616
Posted By Grant-53
There was a car at the Green Grand Prix several...

There was a car at the Green Grand Prix several years ago that managed 203 mpg at 45 mpg. It was a Riley Centurion with a Kubota 3 cyl. from Plattsburgh, NY if I recall correctly. My high mileage...
Forum: Aerodynamics 12-30-2021, 12:00 PM
Replies: 4,211
Views: 1,320,244
Posted By Grant-53
If the article gives the rated horsepower an...

If the article gives the rated horsepower an estimate of the CdA could be made.
Forum: Aerodynamics 12-06-2021, 06:46 PM
Replies: 88
Views: 8,059
Posted By Grant-53
I measure differences in coast down tests for...

I measure differences in coast down tests for bicycle fairings at 13-15 mph.
Forum: Success Stories 11-21-2021, 06:32 PM
Replies: 13
Views: 10,789
Posted By Grant-53
I believe when people refer to Hucho they mean...

I believe when people refer to Hucho they mean Dr. Wolf-Heinrich Hucho who edited "Aerodynamics of Road Vehicles" Fourth Edition. It was published by SAE International. The Fifth edition was...
Forum: Alternative Transportation 11-20-2021, 09:55 PM
Replies: 67
Views: 15,994
Posted By Grant-53
See recumbents.com for the HPV body shell...

See recumbents.com for the HPV body shell software. If you are going to register as a motorcycle trike there may be a 19 inch minimum seat height rule. Check your state DMV laws.
Forum: Aerodynamics 10-22-2021, 03:04 PM
Replies: 11
Views: 1,511
Posted By Grant-53
There is often a gap between perceived value and...

There is often a gap between perceived value and measured value in purchasing a vehicle. Wheelbase, mass, seat height, and head room may sway a buyer as much or more than average annual costs per...
Forum: Aerodynamics 08-27-2021, 02:41 PM
Replies: 22
Views: 2,046
Posted By Grant-53
An option of having one seat a foot or so behind...

An option of having one seat a foot or so behind another has been used in some small aircraft. This means less width needed for elbow and hip room while maintaining ease of communication.
Forum: Aerodynamics 08-27-2021, 02:34 PM
Replies: 9
Views: 1,062
Posted By Grant-53
These trailers usually load and unload on grass. ...

These trailers usually load and unload on grass. Pilots often travel to take part in competitions. Wheel skirts have to come off to change a tire same as a car. What gets measured gets improved. ...
Forum: Aerodynamics 08-22-2021, 05:18 PM
Replies: 9
Views: 1,062
Posted By Grant-53
We see these all the time since the Harris Hill...

We see these all the time since the Harris Hill field is nearby along with the National Soaring Museum. They are specifically designed for carrying high performance sailplanes. A travel trailer...
Forum: Motorcycles / Scooters 05-21-2021, 06:57 PM
Replies: 10
Views: 2,415
Posted By Grant-53
I was at the 2021 Green Grand Prix. The latest...

I was at the 2021 Green Grand Prix. The latest upgrade in the prototype EV that won over the Teslas has a 3 speed transmission. This not a fluke as Bosch is mating a CVT to electric motors. Lots...
Forum: Alternative Transportation 04-19-2021, 11:37 AM
Replies: 14
Views: 3,804
Posted By Grant-53
Several issues are common in this type of...

Several issues are common in this type of vehicle. Pedal clearance with the ground or interior is needed. If running in snow then 4 or more inches, 100 mm, of ground clearance would be needed. ...
Forum: Events & Meet-ups 04-08-2021, 03:42 PM
Replies: 11
Views: 5,608
Posted By Grant-53
Weather looks to much warmer this year.

Weather looks to much warmer this year.
Forum: Events & Meet-ups 03-08-2021, 11:31 PM
Replies: 11
Views: 5,608
Posted By Grant-53
You can study the rules or contact the organizer....

You can study the rules or contact the organizer. Understand that the rally is on the WGI track with average speed of 45 mph. Conditions in recent years have been winter like.
Forum: Events & Meet-ups 02-06-2021, 03:03 PM
Replies: 59
Views: 11,338
Posted By Grant-53
Plans are in the works for the 2021 Green Grand...

Plans are in the works for the 2021 Green Grand Prix for April.
Forum: Alternative Transportation 02-06-2021, 02:59 PM
Replies: 67
Views: 15,994
Posted By Grant-53
This may well be state of the art. Depending on...

This may well be state of the art. Depending on state DMV regs it would be considered a motorcycle. Items to consider might be a wind screen, lap belt, lighting package, and a dynamic braking...
Forum: Alternative Transportation 01-22-2021, 06:03 PM
Replies: 19
Views: 3,003
Posted By Grant-53
Most e-bikes can go 20 mph but speeds on a bike...

Most e-bikes can go 20 mph but speeds on a bike path may be less. Look at a vehicle that can go 30 mph for 80+ miles. What are the local dealers like for parts and service? Do the buses in your...
Forum: Aerodynamics 12-02-2020, 11:52 PM
Replies: 44
Views: 4,110
Posted By Grant-53
The Ford Probe was an example of a low drag...

The Ford Probe was an example of a low drag prototype that inspired a production vehicle.
Forum: Aerodynamics 12-02-2020, 11:37 PM
Replies: 44
Views: 4,110
Posted By Grant-53
At recumbents.com there is the shell design...

At recumbents.com there is the shell design program that can be used to create a shell form. The file then can be used in CFD programs such as AutoDesk. The question as with all measuring devices...
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