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edf funfly
18 Nov 2012 02:32 #18
by Ex-Member
Replied by Ex-Member on topic Re: edf funfly
planking the thrust tube.
once this bit is done i can make up the first part of the fuselage and glue it on, then we can look at the rest of the fuselage.
i should just have enough room for the 2 servos either side of the edf unit with the esc in the nose with the battery.
but it is all suck it and see development this one.
The MCB BLUE ARSED FLY might not even fly.
once this bit is done i can make up the first part of the fuselage and glue it on, then we can look at the rest of the fuselage.
i should just have enough room for the 2 servos either side of the edf unit with the esc in the nose with the battery.
but it is all suck it and see development this one.
The MCB BLUE ARSED FLY might not even fly.
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18 Nov 2012 05:01 #21
by Ex-Member
Replied by Ex-Member on topic Re: edf funfly
i did debate that myself, but as the wing tends to be a floater i thought it would more likely end up a power assist more than an outright power plane.
but it is all experimental.
600watt motor in a 3lb plane might just work.
but it is all experimental.
600watt motor in a 3lb plane might just work.
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18 Nov 2012 14:42 #23
by Ex-Member
Replied by Ex-Member on topic Re: edf funfly
hmmmmmmmmmmm i thought it would be tight.
i can add another small inlet under the fuselage with a bit of fiddling.
i can add another small inlet under the fuselage with a bit of fiddling.
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18 Nov 2012 19:03 #24
by Klipkopwildlife
Do it now, you may never get another chance
Replied by Klipkopwildlife on topic Re: edf funfly
Where I'm coming from is, the fan has to draw air in, there will be a certain amount of compression performed by the EDF, which will tend to increase the airspeed at the thrust pipe, (this is good). However if the inlet is the same size, or smaller then this won't happen.Klipkopwildlife wrote: I calculate 44cm2 for that fan area. I would suggest more inlet area, if I may be so bold! The outlet looks fine.
Do it now, you may never get another chance
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20 Nov 2012 01:10 - 20 Nov 2012 01:11 #25
by Ex-Member
Replied by Ex-Member on topic Re: edf funfly
fuselage sides.
sides going on.
intake openings in the fuselage sides.
another view of the fan area.
fuselage coming together.
underside of the fuselage showing the edf outlet.
I have enlarged the wing openings for the intake ducts to give 48sqcm overall area.
i can still add a cheat intake under the fuselage if needed.
the rear of the fuselage looks weak but is quite strong and with the smaller tail i have planned we should be able to keep the weight down to under 3lbs.
sides going on.
intake openings in the fuselage sides.
another view of the fan area.
fuselage coming together.
underside of the fuselage showing the edf outlet.
I have enlarged the wing openings for the intake ducts to give 48sqcm overall area.
i can still add a cheat intake under the fuselage if needed.
the rear of the fuselage looks weak but is quite strong and with the smaller tail i have planned we should be able to keep the weight down to under 3lbs.
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20 Nov 2012 21:04 #29
by Dean M
Somebody called me 'pretentious' the other day.
I nearly choked on my latte.
Replied by Dean M on topic Re: edf funfly
Looking good
It must be a good way of doing it, as it Tony Nijhuis has made a turbine trainer in a similar style
It must be a good way of doing it, as it Tony Nijhuis has made a turbine trainer in a similar style
Somebody called me 'pretentious' the other day.
I nearly choked on my latte.
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20 Nov 2012 22:42 #30
by Ex-Member
Replied by Ex-Member on topic Re: edf funfly
Well today has seen some more progress.
got the tailplane fin and rudder all built.
The air intakes have been made, just need lining next.
Upped the intake size to 60 sqcm now.
And started sheeting the d box on the main wing.
not sure about the u/c yet, looks like i might need trike u/c. so wing mounted main legs.
just adds to the weight though.
got the tailplane fin and rudder all built.
The air intakes have been made, just need lining next.
Upped the intake size to 60 sqcm now.
And started sheeting the d box on the main wing.
not sure about the u/c yet, looks like i might need trike u/c. so wing mounted main legs.
just adds to the weight though.
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