Search found 5 matches

by kubark42
May 16 2020 7:48pm
Forum: Electric Aircraft
Topic: motor glider project
Replies: 26
Views: 552

Re: motor glider project

I knew this project was getting too easy, throw me another wrench... :-) LOL, don't worry, this just means that you don't want to glass in your bulkhead until you've done thermal performance testing. This can be as easy as putting the cowled motor/prop on the roof of your car and driving it down a ...
by kubark42
May 16 2020 11:33am
Forum: Electric Aircraft
Topic: motor glider project
Replies: 26
Views: 552

Re: motor glider project

There are many options, but As i said,...chose carefully, get independent verification of performance and reliability.  Most RC gear is just poor quality compared to other aviation equipment.  And again , you are not going to get much battery capacity for $2.5k. But until the power and duration req...
by kubark42
May 15 2020 7:08pm
Forum: Electric Aircraft
Topic: motor glider project
Replies: 26
Views: 552

Re: motor glider project

.....at this weight and performance, it seems that there should be large RC power setups that would work. I.... I am sure there are..... But at those power levels, it is at the extremes of RC systems and may not be as low cost as you hope. Also, RC components are not designed with safety or reliabi...
by kubark42
May 15 2020 6:50pm
Forum: Electric Aircraft
Topic: motor glider project
Replies: 26
Views: 552

Re: motor glider project

magcad.de has the 36x15 prop a little down the page. And in a few weeks, I'll have four of them. ;) Each blade is 75-78g, so it's all quite impressive. My theoretical numbers don't take into account prop/airframe interaction, and this is a big source of mystery for me. I don't know if it's a few % o...
by kubark42
May 15 2020 7:27am
Forum: Electric Aircraft
Topic: motor glider project
Replies: 26
Views: 552

Re: motor glider project

I would need the equivalent of a 20-25 hp motor which would give me about a 500 feet per minute climb rate, enough to be safe. With that I could get high enough to shut off the power and soar with thermals after a 5 - 10 minute climb. Having enough reserve to be able to repeat that a couple more ti...