Represent the dialog for retrieving similar scenarios Speaker1: Ok, but 30 minutes, is probably shorter than what you plan to fly. Practice the mission, fly what you practice!
Speaker2: 20 minute duration is what I am aiming for.
Speaker1: Ah. Like my evening "quick fix " flights. From 15-30 minutes. Depends on conditions of course. My plan is for max 1 hour flights.
Speaker2: Exactly, purely a pleasure craft. With the current state of batteries it will be hard to have much more duration and still meet the "5 gallons of fuel" ultralight limit. 
Speaker2: Even without that limit, adding more range makes the problem exponentially harder. 1 hour can be done but it won't be easy.
Speaker1: That's where using a "motor floater" design is superior. Get up there, turn it off and seek thermals. Just use it to go thermal to thermal. Or get back to the runway.
Speaker2: Ah yes, completely agree. 
Speaker2: A self launch motorglider is a real good option. It also helps get around the 30 minute min fuel reserve requirement.
Represent the dialog scenario for retrieval Speaker2 wants to fly 20 minutes on motorglider. Speaker1 aims for 1 hour flights maximum.
Represent the dialog scenario for retrieval Speaker3's sister is studying in Shanghai and she already speaks Chinese. She doesn't find the whole experience amazing but she believes it's a good investment.