4 ms·
FWIW my thoughts: 1. Rear prop strikes. 2. Wing tip prop strikes. 3. Wing tip inertia 4. Prop wash over a wing is a good thing If (big if) this thing ever fli
by tristanb 7y ago
FWIW my thoughts:
1. Rear prop strikes.
2. Wing tip prop strikes.
3. Wing tip inertia
4. Prop wash over a wing is a good thing
If (big if) this thing ever flies, it won't be in this form
- Robotbeat 7y agoProp wash over a wing is good if you're lift-starved at take-off (which you aren't with this design). But otherwise it actually increases drag. Pusher configuration is superior in that you can ingest boundary layer air which has been slowed down by the fuselage and get an increase in efficiency. That efficiency gain is partially why pushers are often used in long-duration drones.
- NickNameNick 7y agoI had the impression that pushers were typically less efficient than pullers. A puller takes advantage of the volume behind the prop taken up by the body of the aircraft to offset the loss of air volume caused by accelerating the air (Bernoulli's theorem). A pusher can't do that.
- Robotbeat 7y agoThe opposite is true. The accelerated airflow over the body of the aircraft actually increases the drag whereas a pusher ingests the boundary layer from the fuselage and the suction also helps keep flow attached. The problem, however, is that turbine engines need a smooth airflow in order to operate efficiently, therefore they aren't suited for pushers as the wings (etc) produce an uneven airflow into the turbine core.