So who knows a bit about electronics?

[Ocean1]

A blended wing, nice. What does it weigh, dude?

[Brian d marge]

A blended wing, nice. What does it weigh, dude?

haa , same thought !, Ive had a glass or two at lunch , was reading all the lectricity gobblety gook ,then Ii fast forwarded to the end, saw your post ,,,, and shot back to have a look ,
Wow , well done that man ! looks awesome ,
Stephen

[Hans]

A blended wing, nice. What does it weigh, dude?

3.5 to 5.5kg. 3.8 at the moment. Plenty of headroom for more payload after flight testing.

[Ocean1]

3.5 to 5.5kg. 3.8 at the moment. Plenty of headroom for more payload after flight testing.

OK, how much of that is the fusilage? I presume it's Eglass over foam or similar?

Is it a single engined pusher?

[Hans]

It still has some interesting flight characteristics. I'll have to rid it of the tendency to flat spin. At least another 6 months of flight testing.

[Hans]

OK, how much of that is the fusilage? I presume it's Eglass over foam or similar?

Is it a single engined pusher?

Close. EPO foam, with CF spars and glass reinforcing. Only the elevons are glass over a foam core. Single engine pusher, electric. Upwards of 90 minutes endurance.

[Ocean1]

Close. EPO foam, with CF spars and glass reinforcing. Only the elevons are glass over a foam core. Single engine pusher, electric. Upwards of 90 minutes endurance.

OK. I like epo, crashes very well. Bit like me.

How did you shape it, hot wire or did you make moulds?

[Hans]

Ok, so now that I'm off the mobile and on the laptop, I can give you some specs:

Composite (Mainly EPO foam an glass) flying wing, single engine pusher. Fuselage is reinforced with fibreglass, wing has 3 CF spars. Electric brushless motor.

Wingspan: 240cm
AUW: 5.5kg maximum
Current TOW: 3.5 - 3.8kg

Operational endurance: 80 minutes cruising at 25m/s
Ceiling: In the region of 15000ft
Operation radius +/- 40kms

Equipment carried at the moment:

Full autopilot
16MP Camera
640 line video camera mounted on pan-tilt gimbal, operated via joystick or click-to-follow on a map. Live video downlink.
Telemetry at 115Kbps to a range of +/- 50km.

That should about cover most of the basics.

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[Hans]

OK. I like epo, crashes very well. Bit like me.

How did you shape it, hot wire or did you make moulds?

It's a heavily modified off the shelf airframe. So you do a bit of R/C?

[Ocean1]

It's a heavily modified off the shelf airframe. So you do a bit of R/C?

Not since they stopped using balsa and dope.

Wouldn't mind gettine into it when I get some spare time. Scale stuff, possibly. Quite fancy things with fully functional 14cyl sleeve valve radials.

Is there rules about chucking tens of KG around semi-rural airspace?

[Hans]

Not since they stopped using balsa and dope.

Wouldn't mind gettine into it when I get some spare time. Scale stuff, possibly. Quite fancy things with fully functional 14cyl sleeve valve radials.

Is there rules about chucking tens of KG around semi-rural airspace?

I'm sure there is. Not my problem. I'm under 4kg at the moment.

[Ocean1]

It still has some interesting flight characteristics. I'll have to rid it of the tendency to flat spin. At least another 6 months of flight testing.

Can you organise a skinny wee high aspect ratio rudder behind that prop?

[Hans]

Can you organise a skinny wee high aspect ratio rudder behind that prop?

If I needed yaw control, i'd just put drag rudders on the winglets. I know why it flat spins, on swept wings there's a spanwise flow along the leading edges right before the stall. The common way to deal with that is wing fences to disrupt the spanwise flow. That should do it in this case.