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Post by blackgull on Apr 8, 2015 17:08:17 GMT 12
I can add a bit to the V1 story. Firstly we really appreciate the kind comments. We also acknowledge that CAA and MFNZ were terrific to deal with as the certification process was not trivial. It has a thrust to weight ration of 1:3, which can give it quite a good performance especially launched off the ramp. We were restricted to a height limit so couldn't do the plunge from the height that we wanted. It has a flight duration of about 3 and half minutes. This from a bank of ten LiPo batteries pulling 600 amps at the motors at 50 Volts. 30 Kilowatts at the motors. The batteries are probably only good for 20 cycles at this level of abuse. We pull 350 Kg from the bungy at launch and still pull 200 at the end of the ramp. Acceleration is down the ramp in just over a second so the model has to absorb that. The release mechanism is quite clever to ensure a positive release at the end and an inertial flywheel takes up some of the energy so as to reduce the violent pull on the dolly. The residual energy at the end of the ramp is taken up with a set of nylon ropes which stretch about 20%. The control link is on 2.4 GHz with each flying surface having its own Rx, battery and servo. There are two separate control links from the ground to the model, and we can fly it on each link. No internal wiring apart from the power reticulation which is by way of two inch square aluminum bars, chosen as compromise between weight and voltage loss. Lighter than copper. Achieving CoG at 7 inches from leading edge was a challenge and one of the reasons a turbine was rejected.
We can develop it further to increase authenticity and relaibility. A pneumatic ram is next and fully enclosed motor pod.
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Post by davelochead on Apr 8, 2015 17:14:26 GMT 12
Greetings,
Im pleased you all enjoyed the show, as i did this year, from my perspective it went extremely smoothly.
As a matter of interest, has anyone got a pic of me exiting the "burning" bleriot? and the Chariots of fire Fokker on restoration row?
Dave
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Post by ErrolC on Apr 8, 2015 17:29:23 GMT 12
Greetings, Im pleased you all enjoyed the show, as i did this year, from my perspective it went extremely smoothly. As a matter of interest, has anyone got a pic of me exiting the "burning" bleriot? and the Chariots of fire Fokker on restoration row? Dave I was distracted by the Pither 'fast taxi' so not so great of you getting out, but how about this!  Too much for the chap! by errolgc, on Flickr I took snaps of everything on Restoration Row, if no-one else posts I should be able to pull out one tomorrow (have some other requests to sort too). |
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Post by blackgull on Apr 8, 2015 17:39:45 GMT 12
Ops - I meant 600 amps! Actually pulls 30 Kilowatts at the 5 motors.
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Post by davelochead on Apr 8, 2015 17:41:40 GMT 12
Greetings, Im pleased you all enjoyed the show, as i did this year, from my perspective it went extremely smoothly. As a matter of interest, has anyone got a pic of me exiting the "burning" bleriot? and the Chariots of fire Fokker on restoration row? Dave I was distracted by the Pither 'fast taxi' so not so great of you getting out, but how about this! Too much for the chap! by errolgc, on Flickr I took snaps of everything on Restoration Row, if no-one else posts I should be able to pull out one tomorrow (have some other requests to sort too). Thanks for that Errol, seems many people in that part of the crowd really thought the Bleriot had caught fire and i was overcome by smoke trying to exit :-D |
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Post by thebrads on Apr 8, 2015 17:42:54 GMT 12
I can add a bit to the V1 story. Firstly we really appreciate the kind comments. We also acknowledge that CAA and MFNZ were terrific to deal with as the certification process was not trivial. It has a thrust to weight ration of 1:3, which can give it quite a good performance especially launched off the ramp. We were restricted to a height limit so couldn't do the plunge from the height that we wanted. It has a flight duration of about 3 and half minutes. This from a bank of ten LiPo batteries pulling 600 watts at the motors at 50 Volts. The batteries are probably only good for 20 cycles at this level of abuse. We pull 350 Kg from the bungy at launch and still pull 200 at the end of the ramp. Acceleration is down the ramp in just over a second so the model has to absorb that. The release mechanism is quite clever to ensure a positive release at the end and an inertial flywheel takes up some of the energy so as to reduce the violent pull on the dolly. The residual energy at the end of the ramp is taken up with a set of nylon ropes which stretch about 20%. The control link is on 2.4 GHz with each flying surface having its own Rx, battery and servo. There are two separate control links from the ground to the model, and we can fly it on each link. No internal wiring apart from the power reticulation which is by way of two inch square aluminum bars, chosen as compromise between weight and voltage loss. Lighter than copper. Achieving CoG at 7 inches from leading edge was a challenge and one of the reasons a turbine was rejected. Thanks heaps for that, it answered most of my questions! Confirm 6 hundred watts per fan, seems light? not 6000? |
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Post by blackgull on Apr 8, 2015 17:44:17 GMT 12
my slip. I meant 600 Amps, 30 Kilowatts.
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Post by lesterpk on Apr 8, 2015 17:57:43 GMT 12
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Post by Dave Homewood on Apr 8, 2015 18:07:17 GMT 12
Greetings, Im pleased you all enjoyed the show, as i did this year, from my perspective it went extremely smoothly. As a matter of interest, has anyone got a pic of me exiting the "burning" bleriot? and the Chariots of fire Fokker on restoration row? Dave I got these Dave:   |
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Post by Dave Homewood on Apr 8, 2015 18:08:00 GMT 12
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Post by joesmith on Apr 8, 2015 19:29:42 GMT 12
The highlight for me was the return of NH799.  The Spitfire Mk.14 making it too Omaka for the airshow was the highlight of my weekend too and I was not even there to see it displayed  . Joe [/quote] |
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Post by Dave Homewood on Apr 8, 2015 19:33:15 GMT 12
I can certainly understand that, great work mate!
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Post by joesmith on Apr 8, 2015 19:49:31 GMT 12
I can certainly understand that, great work mate! Cheers Joe. |
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Post by mumbles on Apr 8, 2015 20:09:36 GMT 12
It's bollocks. The Fw190 is certainly repairable. Once again, has anyone got the ground loop on film please? It sure is. The Marlborough Express article says no such thing as claimed. It merely reports on what idiot news organisations overseas are saying. CLICK HERE to view the Marlborough Express article, which was published earlier this morning on Fairfax NZ's STUFF website. Those overseas news websites are merely publishing sensationalist bullshit. However, based on the principle that any publicity is better than no publicity, then overall the publicity is probably good for Classic Fighters, as stated by Graham Orphan in the Marlborough Express article. Is it just me, or is anyone else quietly enjoying the irony of a stuff/fairfax article pointing out someone else's mistakes in an aviation story? |
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Post by mumbles on Apr 8, 2015 20:16:34 GMT 12
It sure is. The Marlborough Express article says no such thing as claimed. It merely reports on what idiot news organisations overseas are saying. CLICK HERE to view the Marlborough Express article, which was published earlier this morning on Fairfax NZ's STUFF website. Those overseas news websites are merely publishing sensationalist bullshit. However, based on the principle that any publicity is better than no publicity, then overall the publicity is probably good for Classic Fighters, as stated by Graham Orphan in the Marlborough Express article. I checked the Marlborough Express for what it had actually published before I wrote in the comments section of the UK Daily Mail. What it said the ME had published was a complete fabrication, but then the DM report came out of Australia. Posted this earlier in the thread and apologies for the off topic repost, but this is how sites like the mail work. Actual journalism isn't a priority. tktk.gawker.com/my-year-ripping-off-the-web-with-the-daily-mail-online-1689453286 |
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Post by mumbles on Apr 8, 2015 20:29:51 GMT 12
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Post by mumbles on Apr 8, 2015 20:42:08 GMT 12
A non-event ultimately, but interesting occurence nonetheless during Saturday's display. That's a new one for me. For a second I was worried we'd see another machine on it's belly  IMG_9594p by saylittle2, on Flickr I quite enjoy the paired Yak display at the moment, it's elegant and full of nice moments like this  IMG_9592p by saylittle2, on Flickr |
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Post by Deleted on Apr 8, 2015 20:51:16 GMT 12
I spotted a couple of likely looking lads on the corner, one of whom is wearing a T-shirt that will be familiar to some. I've got an idea of who they are but they can ID themselves if they want   Come now, there's no way on earth you could possibly know that's ErrolC and I! Also, great photo of the Yaks - I admit I was very very concerned when I saw that, and when they did a final low pass I actually knelt down to look at VVS' belly! Apparently such things can be common with the Yaks? |
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Post by Dave Homewood on Apr 8, 2015 21:12:24 GMT 12
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Post by suthg on Apr 8, 2015 21:23:27 GMT 12
Thanks Dave, nicely artistic! Well framed... |
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