Mastertech

My Feedback: (31)

I always thought the Cuban 8 was two loops connected by 45's.

I was taught the two loops should intersect each other in the radius (if the 45's were not there). Looking at the NSRCA ribbons/judging section it doesn't appear to be the case. Looking at the AMA rules it doesn't say to down grade for the loops being apart from each other.

OO versus OXO

Which is correct? If they can be separate then I owe a few fliers some points from the last contest.

rcpattern

My Feedback: (45)

Tim,

I'm almost positive they can be separate. I would think if the two had to be adjacent to each other the 45 degree line would have to be so short you would not be able to perform any maneuvers. In FAI you might see 2 loops with an integrated roll between them in which case the two would have to be touching, but just laying it out here with 2 quarters on my desk, I'm not sure how you would be able to do it if the two were touching,

Arch

can773

My Feedback: (1)

I believe that a proper Cuban would be geometrically impossible if the loops are touching. Ola Fremming did a manuver analysis for P-09, here is a Cuban 8, its clear that the loops cannot possibly be touching.

http://www.ofremmi.info/F3A/Schedule...sis/P09-15.jpg

flyintexan

My Feedback: (1)

Geometrically impossible to have a line with loops touching.

By definition of the 45deg angle and tangency to the loop elements, the length of the 45deg line will be equal to the diameter of each loop.


-mark

rcpattern

My Feedback: (45)

Thanks Mark and Chad. Nice to see it present graphically.

Arch

Mastertech

My Feedback: (31)

Good thing I read the rule book again. Nice that the ribbons are on the NSRCA website.

Thanks for the confirmation I was screwing up. DOH!

Thanks for the diagrams.