3. Anatomy of a Blimp “A blimp, or non-rigid airship, is an airship without an internal supporting framework or keel.” - wiki Stabilizers Envelop Motors Gondola Propellers
4. HELIUM - Calculating Lift At standard temperature and pressure, mass density of Air : ρair= 1.293 kg/m3 Helium : ρHe=0.178 kg/m3 Neon: ρHe= 0.9 kg/m3 Wload = [(ρair– ρHe) x volume – Wenv] Kg Grade A Helium gas = 99.995% He and 0.005% Ne Wload= [(ρair-0.99995ρHe - 0.00005ρNe) x volume – Wenv] Kg
5. HELIUM - Calculating Lift Wload= [1.1149 x volume – Wenv] Kg Thumb rule : 1m3 of helium can lift 1.1 kg of load
6. Latex Balloons vs. Rigid Envelops Which one is better? Balloons have internal pressure much higher than atmospheric => unnecessary helium mass => no extra lift Rigid envelops will have pressure equivalent to atmospheric pressure => better efficiency
24. Pressure Sensors Barometric pressure sensing for altitude measurement Can achieve resolution of about 10cm at sea level Pressure decreases at the rate of 100 millibars per 800 meters $55