NT5224 Posted November 15, 2020 Author Share Posted November 15, 2020 (edited) 21 hours ago, Old Koreelah said: Alan you have some serious hold-downs there! Old Korrelah My father-in-law is a German structural engineer. He calculated we needed 24 tonnes of ballast to hold the structure secure to a sub-cyclonic wind speed. That's 24 tonnes there but the reality is the fabric would give way long before the blocks shifted! Our bird flies south if big winds are expected -and we live outside of the cyclonic zone. Alan Edited November 15, 2020 by NT5224 1 Link to comment Share on other sites More sharing options...
NT5224 Posted November 15, 2020 Author Share Posted November 15, 2020 23 hours ago, Blueadventures said: Looks nice. Re pump I made up a 12 volt one using the red 'AreoFlow' 97 GPH pump works a treat off either the aircraft battery or my hangar spare on a trolley. Cheers Blue Good idea. I've admired systems like you describe but to be honest I'm a bit wary of an electric fuel pump owing to fire hazards. I'm out the back of beyond and in the dry season this whole district is a tinderbox waiting for a spark. The high ambient temperatures here makes batteries temperamental. I'll stick with a basic hand pump for now. Cheers Alan 1 Link to comment Share on other sites More sharing options...
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