Quote:
Originally Posted by 4862forestgrove
Created the following attachment today...
1. I decided to do out and measure actual values on my Jetta today rather than relying on computer pictures and estimated curves. I measured the peak of the roof line to be back 48 inches from the back of the Jetta. Maximum height at that point was 56.75 inches. Drop to the back was 1 inch. Height at back was 55.75 inches.
2. I used these values along with the xy coordinates of the AST II template to scale a spreadsheet graph and then fit an image of the Sportwagen under the curve.
3. I generated a scale factor to create the rest of the xy coordinates.
4. The top of the trailer frame is 17". The frame is 3.5" channel, so the underside is 13.5". The A frame tongue is 42" from the front of the frame to the hitch.
5. Using these constraints, I generated a trailer body at 8', 9' and 10' lengths of the frame, fitting close to the back of the vehicle
6. The top will be a simple lift of back first... block, then front... block. I'm thinking a simple pull out block (shelf) once the trailer body is lifted.
Thoughts so far?
BB
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*The 'full-boat-tail trailer for T-100' thread may have some pictorial drag tables which will help you think about your project.Also the half-body charts at 'AST-C additional drag tables' thread.
*The body drag of your combination will be factored from the new base area of the trailer's transom area,plus a penalty for the car-trailer inter-spacial gap interference(look at the Clark-Y wing with various gap combinations),and then the wheel/tire drag superimposed back onto the body (call that portion Cd 0.05 ).
*If the trailer nose is unshielded,make it as complex as you can stomach (Airstream's design is very good).This will help in crosswind.