I've been doing a lot of "TRE" flying in RealFlight to get used to how you need to fly most WWI models. It's still amazing to me that you actually CAN fly and turn a plane without ailerons (or wing-warping).

Like a lot of WWI aircraft the wing spar roots just really slotted into a hole and where held on with the wires. Later on in the war either pins or fancy connectors were used by initially it was just a bunch of wires holding these contraptions together!