The Model Barn - Slider

Notice how much better the G/W (efficiency) figure is as the power is reduced.
Its not how well it flies at full power but just how little is required..

While I'm logged on, a quick update.
I took it up to the field for my recent training section to get someone to give it a whirl.
It lifted off quite well but then the wind, which had picked up since earlier in the day, caught it & it adamantly refused to listen to the commands which resulted in a nose-dive from about 20ft. No real damage, just a broken prop.
Once retrieved it could be seen that the wings had shifted so the conclusion was that their fixing wasn't secure enough & the wind had shifted them resulting in an unflyable configuration.
The centre of the wing looked too weak to take any tighter wingbands & there was no location devices so I've adding some balsa sheet to the upper LE & TE where the wingbands cross over & two strips underneath where the wing sits on the seat side-pieces & will add a couple of blocks to locate it on the wing seat.
While covering the additions with the polyester fabric & water-based dope it again formed blebs which I shrunk back with the heat iron. It seems that the fabric absorbs the water in the dope & stretches. In the videos on you-tube of Mark Croucher using this type of covering he uses cellulose-based dope & he doesn't have this problem so it looks like the water-based stuff isn't suitable for this technique.

I've modified the wing seat & it seems alot better now but for a variety of reasons I haven't been up to the flying field so its sitting waiting for its next trial.
I ordered some more stuff & the TE's I wanted for the buzzard. I covered the wings yesterday with polyester fabric. I've also now got some cellulose shrinking dope, hopefully it produces a better result than the water-based stuff. I'll have to tidy up the shed so I've got the space & ventilation to use it.
I'll do some posts now of what else I've been doing in the meantime.

I finally got round to cleaning the bench in the shed & collecting some jars together (I hope the smell of pickled onions doesn't persist) to get a start on cellulose doping the Buzzard wings. I've given the undersides three coats of 50/50 & will leave it overnight to dry properly.
When I was a kid there wasn't all this fuss about dope or balsa cement. I would have done it all in the house, probably in the front room.

I didn't mention it but when I went to cellulose dope the Buzzard wings I had to heat shrink the polyester fabric again, it had slackened off & there were quite large blebs on the balsa sheeting at the leading edge.
So I found the little test piece that I'd done to try out the fabric & water based dope. It was still taut. It had just been sitting on a bookshelf & not subject to sunlight or temperature changes so I think its that which is slackening the fabric. When I took the Slider to the field it was noticeable how it had slackened.
I brushed some cellulose onto the test piece so see if there was any interaction, there wasn't so I've cellulose doped the fuselage & tail of the Buzzard & will cellulose the Slider.