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Sterling101
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I think those winds have gone global, a calm day here is 20k but that's at 3am and by 5.30 it's up to 50k.

We've had storms here today (well down south from here) which have caused massive flooding.
All we've had here so far though today is more very high winds and humidity you can swim in...
Whoever said nothing is impossible had obviously never tried slamming a revolving door...
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Sterling101
Decided seeing as it flew ok it needed some bracing so I've added two strips of dowel on each leading edge, stuck on a KF2, shaped it and added some orientation paint.
Now let's see if the weather report is right about having high winds and rain from now until the end of next week shall we...

IMG_20170719_210628_508.jpg 
Whoever said nothing is impossible had obviously never tried slamming a revolving door...
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Sterling101
Managed a couple of flights tonight and even tried out my new toy - I've bought myself an anemometer so I can accurately gauge the ground conditions rather than guessing! Quite happy with how it works and it has multiple different units to choose from on the fly and a temperature readout too.
Really cheap from BangGood too - https://www.banggood.com/UNI-T-UT363-Mini-Digital-Wind-Speed-Meter-Pocket-Anemometer-Speed-Temperature-Tester-Thermometer-p-1080805.html

So, first flight was OK. Felt a little tail heavy and was struggling in the Homey Vortex caused by the wind coming over the trees. May have been the balance or just the odd vortex, I'm not sure but on the cross wind leg it was being buffeted around quite a lot.
So for the second flight I shifted the battery forwards and it seemed a little more planted with less twitchiness so post strengthening it may need a re-calculation on the CG position.
Here's a video of both flights anyway - 8-9mph winds though and I measured gusts up to 16mph!



Now here's the fun part - I also took the P.60 and flew it straight after the second test flight. I think I have some drag going on you might say as the comparison of how the P.60 performs is pretty impressive.
Next test will be the prop and motor combo on a ductless mount to see what difference it makes to the flight characteristics.

Here's a video of the P.60 flight though - bit of hooning never hurt anybody!

Whoever said nothing is impossible had obviously never tried slamming a revolving door...
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Sterling101
Decided to remove the duct tonight and do a proper thrust test so here's the results...

With duct, as flown I see at WOT 840g thrust at 26A.
Without the duct I see at WOT 790g thrust at 28A.

So I get a gain of 50g from having the prop ducted. The killer is, the ducting weighs 82g!!
So essentially it's making nearly the same thrust but with slightly less amp draw but the extra weight kind of cancels things out a bit.

I'm currently printing a mount to try that has no ducting and assuming the weather doesn't hit stupid levels again over the weekend I'll see if I can get a comparison flight in.

On paper though it's looking grim for the old duct I must admit!
Whoever said nothing is impossible had obviously never tried slamming a revolving door...
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Wildthing
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Decided to remove the duct tonight and do a proper thrust test so here's the results...

With duct, as flown I see at WOT 840g thrust at 26A.
Without the duct I see at WOT 790g thrust at 28A.

So I get a gain of 50g from having the prop ducted. The killer is, the ducting weighs 82g!!
So essentially it's making nearly the same thrust but with slightly less amp draw but the extra weight kind of cancels things out a bit.

I'm currently printing a mount to try that has no ducting and assuming the weather doesn't hit stupid levels again over the weekend I'll see if I can get a comparison flight in.

On paper though it's looking grim for the old duct I must admit!

It will work good in one of those Fatty planes.
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bogusbandit56
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Decided to remove the duct tonight and do a proper thrust test so here's the results...

With duct, as flown I see at WOT 840g thrust at 26A.
Without the duct I see at WOT 790g thrust at 28A.

So I get a gain of 50g from having the prop ducted. The killer is, the ducting weighs 82g!!
So essentially it's making nearly the same thrust but with slightly less amp draw but the extra weight kind of cancels things out a bit.

I'm currently printing a mount to try that has no ducting and assuming the weather doesn't hit stupid levels again over the weekend I'll see if I can get a comparison flight in.

On paper though it's looking grim for the old duct I must admit!

This has got me wondering if you had one of those motors with the shaft out one end and the adapter for the other end you could fit twin props.
Wot, no Depron?
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Wildthing
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This has got me wondering if you had one of those motors with the shaft out one end and the adapter for the other end you could fit twin props.

Hmmm, NTM 2700 or 3000 on 4S.
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Sterling101
Between the rain this morning and later this afternoon there was a spell of great sunny weather with a nice steady 6mph wind so decided to test the unducted prop.
Seems a little faster, maybe not as stable though. Did a reasonable flight to get a feel for it then went mad and cut the vertical stabilisers in half and went again.
A little more twitchy but not massively so but not other change in flight performance other than that.
Now I'd love to say I had a video, and at first I thought I had, right until the end of the first flight when I went to stop the recording and found my camera switched off.
It seems in all the excitement it has decided that it has had enough and has gone to stay at mothers... permanently! Yes my camera has crapped out, kaput, it has ceased to be - it's a stiff
So I have a new one (another GoPro clone) on the way for tomorrow so hopefully I can swap my lens over successfully and be up and running again soon.

I'm kind of underwhelmed by this plane though. For all the promise it seemed to have it's not a patch on the P.60 so it may well get retired before I spend too much more time on it. I do have a Hawk to finish after all and I have an itch for a new build too....
Whoever said nothing is impossible had obviously never tried slamming a revolving door...
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bogusbandit56
Quote:
Between the rain this morning and later this afternoon there was a spell of great sunny weather with a nice steady 6mph wind so decided to test the unducted prop.
Seems a little faster, maybe not as stable though. Did a reasonable flight to get a feel for it then went mad and cut the vertical stabilisers in half and went again.
A little more twitchy but not massively so but not other change in flight performance other than that.
Now I'd love to say I had a video, and at first I thought I had, right until the end of the first flight when I went to stop the recording and found my camera switched off.
It seems in all the excitement it has decided that it has had enough and has gone to stay at mothers... permanently! Yes my camera has crapped out, kaput, it has ceased to be - it's a stiff
So I have a new one (another GoPro clone) on the way for tomorrow so hopefully I can swap my lens over successfully and be up and running again soon.

I'm kind of underwhelmed by this plane though. For all the promise it seemed to have it's not a patch on the P.60 so it may well get retired before I spend too much more time on it. I do have a Hawk to finish after all and I have an itch for a new build too....

Hi Leigh, glad you managed to get out this afto I was very busy working hard.
I had a load of trouble with my Mobius some time ago and it wasn`t till I got my new laptop that I managed to get it working again.
any idea what happened to your camera?
It seems Gotha were on to something very special with the P.60 design, it is wonderfully stable and very easy to chuck about.
Wot, no Depron?
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Sterling101
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Hi Leigh, glad you managed to get out this afto I was very busy working hard.
I had a load of trouble with my Mobius some time ago and it wasn`t till I got my new laptop that I managed to get it working again.
any idea what happened to your camera?
It seems Gotha were on to something very special with the P.60 design, it is wonderfully stable and very easy to chuck about.

I think it's a hardware problem within the camera - nothing responds to any input, just all out of power no matter what.
Will take it apart and have a dig around but knowing how chinese manufacturing works it's probably dead.

The Gotha design is just so slippery - I think they managed to luck onto the holy grail of wing design when they came up with the P.60.
I do often wonder how a full airfoil version would work - totally scale lines would just look so good on it
Whoever said nothing is impossible had obviously never tried slamming a revolving door...
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