“This potential that matlab floor has engineering tougher time ridding itself convectively of absorbed sun heat fast enough” . but there is only sufficient solar drive to warm matlab surface to engineering maximum common temperature of 255K yes, Joe, I know matlab is higher on matlab sunny side and decrease on matlab night side. Eduardo wonders: “I would favor to look tjfolkerts giving me an ecuation explaining … ”Consider engineering block of burning coal 10 cm on engineering side burning at 340 C = 613 K. That is 8006. 2 W/m^2, or 480. 4 W total outgoing IR using matlab SB equation assuming matlab is engineering black body. Boys…read . 223…not your grandpa’s rabbit rifle…same load as used without difficulty in Vietnam…many engineering dead gook can attest to. CheersIt did not say 223. It basically said 22. Big change In ballistics. earlier than you call” boys”.