Feb 22, 2013, 05:00 PM Registered User Joined Feb 2013 5 Posts Question Need Help Hello to all friends ... Recently i bought an r/c blimp of 4m it weighs 3.5 kg ( 7.7 lbs ) can anybody tell me how much helium in cubic meters do i need to fill it..? and how much payload of my electronics it can carry ? I am planning to put a small video transmitter of 104 gms ./ a lipo battery of 3 cell and a camera ( very small ) ...thanks in advance......
 Sign up now to remove ads between posts
 Mar 04, 2013, 07:17 PM Registered User United States, OK, Tahlequah Joined Feb 2013 47 Posts How much helium you need depends on the volume of the blimp and/or how much weight you want to lift. If you can provide more details about it than just "4m", I can help you calculate it. You could try filling it up with regular air and measure how much air it takes. another thing to try if you have no way to measure the volume of air is to fill the envelope with water and then empty it into a container of known volume. If you just want to know how much helium you need to lift your payload, you need only a basic chemical background to calculate it. Your blimp weighs 3500 g + 104 g video transmitter + my 3-cell 2200mAh battery weighs 175 g + about 50 g camera is 3830 g. Helium lifts about 30 g / ft^3, so 3830/30 = 127 cubic feet of helium needed. Hope this helps. RotorHead460 a.k.a. Tristan

 Thread Tools

 Similar Threads Category Thread Thread Starter Forum Replies Last Post Help! Need help on repair. copycat_00 Crash Discussion 2 Jan 28, 2013 09:16 AM Help! New Guy Needs Help hyoslvr Beginner Training Area (Heli-Electric) 14 Jan 12, 2013 11:15 PM Help! Need help setting up Walkera V120D02S... LucidSoul Micro Helis 6 Jan 04, 2013 10:46 AM Question first "3d" plane help needed Vortex000111 3D Foamies 11 Jan 03, 2013 08:21 AM Discussion my boat needs some help devansh Racing Boats - Electric 2 Jan 02, 2013 06:31 PM