CF is partially metallic .. Enough so that it kills radio signals .. A cellphone inside the shell of a velo typically won't get signal .. neither will a GPS .. Thats part of the reason I have that re-rad box on the velos, to move the outside GPS signals, inside.
with RFID putting the tag outside on the shell doesn't work .. there's a phenomena called "electromagnetic reflectivity " that distorts the transmitted signal making it unreadable. RFID works by a small transmitter that is charged up by the loop (similar to those contact-less chargers on some cell phones) The "loop" transmits energy which charges the on-chip transmitters capacitor which, when charged enough, causes the ID signal to be transmitted which it then reads via a receiver in the loop. The shell reflects so much of that energy that the charge-to-transmit timing is off and the transmit signal itself becomes distorted.
Quote from Action Lad on Sep 3rd, 2017, 7:20pm:Quote from MrWizard on Sep 3rd, 2017, 9:39am:Carbon fiber velomobiles and RFID don't mix .. There's a newer chip design that works better, but HH100 isn't using it.
Oh, is it that the CF doesn't let the signals get through? I don't know what they look like, but is it possible to have it on the outside? Does it fall off/jounce off easily?