2b:null 2c:["$","title",null,{"children":"Ball Launcher Motor Selection | David Kirkby | Observable"}] 31:T4b9,wheelDiagram = { const scale = 10; // pixels/cm const p = 8; // margin padding in pixels const { height, width, offset, alpha, dy, r } = soln; const C = d3.path(); function drawArc(s) { const xc = scale * (width/2 + s * offset) + p; const yc = scale * height/2 + p; const phi0 = s > 0 ? Math.PI : 0; C.moveTo(xc,yc); C.arc(xc, yc, scale * r, phi0 - alpha, phi0 + alpha, false); return C; } return html`
\nTorque to launch at ${speedMPH} mph over ${F(soln.angleDeg)}° is ${F(soln.torqueNm)} N m = ${F(soln.torqueInchLb)} in-lb.
\nMin power is ${F(soln.minPowerW)} W = ${F(soln.minPowerHP)} hp.`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":177,"value":"$32","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":234,"value":"F = d3.format(\".1f\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":0,"value":"$33","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":94,"value":"$34","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":123,"value":"speedMPH = 50","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":139,"value":"maxKv = 500; // RPM / Volt","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":148,"value":"voltage = 18","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":116,"value":"nWheels = 3","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":30,"value":"minWheelDiameterCM = 5","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":33,"value":"maxWheelDiameterCM = 25","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":24,"value":"ballDiameterCM = 7.5","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":26,"value":"ballMassG = 25.0","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W35","stdlib":"1","titling":"auto"}} 30:"$2f:body"