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  • Users: ffinybryn
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  1. ffinybryn

    Time delay switch on

    I wonder if anyone can help me with an idea... Problem: I am building a large (2m wingspan - 3Kg) RC plane which is propelled by a 11" propeller situated at the rear ("pusher prop"). The plane is designed to be hand launched. However, this has resulted in other pilots having their hands...
  2. ffinybryn

    Geotechnical: Uplift/Heave in top-down construction

    I am an Engineer working on a soon to be (very) multi-storey building. The contruction method is "top-down". Steel plunge columns are piled deep into the ground to allow steel erection to start from the ground floor upwards, whilst at the same time, excavation of the top-soil can continue...

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