Post by rpenning on Jan 15, 2012 22:51:10 GMT -6
Ok I am better prepared for this year, I have two weeks to build three cards, not an issue as I already have the cars and all the tools. Here are the rules I have to follow.
1. LENGTH, WIDTH, HEIGHT, & CLEARANCE
a. Maximum overall width (including wheels, axles or other parts) shall not exceed 2 ¾”.
b. Minimum width between wheels shall be 1-3/4” so the car will clear the center guide strip.
c. Maximum height shall not exceed 3-1/2” so the car will clear the race timer.
d. Minimum clearance between bottom of car and track shall be 3/8” so the car will clear the center guide strip.
e. Maximum length shall not exceed 7”.
2. WEIGHT AND APPEARANCE
a. Weight shall not exceed 5 ounces. The readings of the Official Race Scale will be considered final. (use a bit of leeway as den scale may have been off a tad) The car may be hollowed out and built up to the maximum weight by the addition of wood or metal only, provided it is securely built into the body of the car or firmly attached to it. No loose materials of any kind will be permitted in or on the car. The bottom of the car must be smooth in order not to damage the car stopping area of the track.
b. Mercury or other liquids shall not be used for adding weight. Mercury is a potential health hazard.
c. Details such as steering wheel, driver, spoiler, decals, painting and interior details are permissible as long as these details do not cause the car to exceed the maximum length, width, height, and clearance specifications already listed.
d. Cars with wet paint will not be accepted.
3. WHEELS AND AXLES
a. Only the official Scout Grand Prix wheels and axles can be used. Wheels must have “Official B.S.A,” stamped on the wheel rim.
b. Wheels can be sanded to remove surface imperfections, but the surface that touches the track must be left flat and at least ¼” wide.
c. Wheel bearings, washers or bushings are prohibited.
d. The car shall not ride on any type of springs.
e. The car must be freewheeling with no starting device or propulsion.
f. The wheel base location of the car may be adjusted as long as you still adhere to the maximum length, width, height, and clearance specifications.
g. Hubcaps or similar items used to keep the wheels lubricated are prohibited.
h. Spoke wheels and/or modified wheels are prohibited.
Now with these rules I think I can do a lot but to make sure I am making the best choices in design and modifications I want to get some input. The track we will be using is an aluminum best track I think. I was planning on extending the wheel base as much as possible so that the ends of the wheels are the limits of the length. I was also going to drill new axle holes and lower the body, do I need to do that on the front and rear or just the front. I was going to make the right front wheel the dominant wheel and also move it inwards to the center of the body a 1/16th of an inch. Raise the left front wheel so that it is not touching the track and follow the rail rider design plan. I was wondering about canting the rear wheels and also the suggested COG. Last is the weight placement, not sure on that. I appreciate all input and suggestions.
1. LENGTH, WIDTH, HEIGHT, & CLEARANCE
a. Maximum overall width (including wheels, axles or other parts) shall not exceed 2 ¾”.
b. Minimum width between wheels shall be 1-3/4” so the car will clear the center guide strip.
c. Maximum height shall not exceed 3-1/2” so the car will clear the race timer.
d. Minimum clearance between bottom of car and track shall be 3/8” so the car will clear the center guide strip.
e. Maximum length shall not exceed 7”.
2. WEIGHT AND APPEARANCE
a. Weight shall not exceed 5 ounces. The readings of the Official Race Scale will be considered final. (use a bit of leeway as den scale may have been off a tad) The car may be hollowed out and built up to the maximum weight by the addition of wood or metal only, provided it is securely built into the body of the car or firmly attached to it. No loose materials of any kind will be permitted in or on the car. The bottom of the car must be smooth in order not to damage the car stopping area of the track.
b. Mercury or other liquids shall not be used for adding weight. Mercury is a potential health hazard.
c. Details such as steering wheel, driver, spoiler, decals, painting and interior details are permissible as long as these details do not cause the car to exceed the maximum length, width, height, and clearance specifications already listed.
d. Cars with wet paint will not be accepted.
3. WHEELS AND AXLES
a. Only the official Scout Grand Prix wheels and axles can be used. Wheels must have “Official B.S.A,” stamped on the wheel rim.
b. Wheels can be sanded to remove surface imperfections, but the surface that touches the track must be left flat and at least ¼” wide.
c. Wheel bearings, washers or bushings are prohibited.
d. The car shall not ride on any type of springs.
e. The car must be freewheeling with no starting device or propulsion.
f. The wheel base location of the car may be adjusted as long as you still adhere to the maximum length, width, height, and clearance specifications.
g. Hubcaps or similar items used to keep the wheels lubricated are prohibited.
h. Spoke wheels and/or modified wheels are prohibited.
Now with these rules I think I can do a lot but to make sure I am making the best choices in design and modifications I want to get some input. The track we will be using is an aluminum best track I think. I was planning on extending the wheel base as much as possible so that the ends of the wheels are the limits of the length. I was also going to drill new axle holes and lower the body, do I need to do that on the front and rear or just the front. I was going to make the right front wheel the dominant wheel and also move it inwards to the center of the body a 1/16th of an inch. Raise the left front wheel so that it is not touching the track and follow the rail rider design plan. I was wondering about canting the rear wheels and also the suggested COG. Last is the weight placement, not sure on that. I appreciate all input and suggestions.