Jack Crossfire's Blog – January 2010 Archive (4)

THIS WEEK IN AEROSPACE

A MATERIAL THAT BONDS TO PLASTIC





After years of JB Weld, Cyanoacrylate, & epoxy failures, someone in China finally invented a material that bonds to plastic: SHAPELOCK You might even bypass the shipping costs by driving to Sunnyvale & getting it from this guy's house.



http://shapelock.com/



Heat it to 150F & it permanently sticks to plastic, allowing repairs to ever broken T-Rex landing… Continue

Added by Jack Crossfire on January 29, 2010 at 11:30am — 6 Comments

THIS WEEK IN MARCY 1 AVIATION



Decal applied.







Ground station packed in. Battery sensor calibrated.





This design did not achieve horizontal control. The pitch oscillation

from not having enough balance beam inertia offset any horizontal force.…



Continue

Added by Jack Crossfire on January 22, 2010 at 2:27am — 6 Comments

MARCY-1 LIFTS OFF



There it is. Marcy-1's first free flight on the golf course.



The 900Mhz RC transmitter interferes with the telemetry receiver even though they're on opposite ends of 915Mhz. You need to keep them separated or on different bands, which requires rebuilding the entire transmitter.



The notoriously fickle capture compare on the PIC is still extremely hard to get working in the field.…



Continue

Added by Jack Crossfire on January 15, 2010 at 11:30am — 7 Comments

EVOLUTION OF MARCY-1

Still no idea how to protect the propeller without a plastic injection molded shroud. This is 1 area where a $1000 makerbot would come in handy. Just don't have a $130,000,000 government real estate loan to store it on.







Marcy-1 came in just as heavy as Vika 3. The surface mount board, integrated radio, & new name made no difference. She has a lot more wood than Vika 3 but is more… Continue

Added by Jack Crossfire on January 8, 2010 at 11:00am — 2 Comments

© 2019   Created by Chris Anderson.   Powered by

Badges  |  Report an Issue  |  Terms of Service