Author Topic: Quark 2M - Back to cutting innocent trees!  (Read 368010 times)

Nhalyn

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Re: Quark 2M - Back to cutting innocent trees!
« Reply #495 on: June 13, 2017, 09:54:34 AM »
Hummm... like this porn style... :-[

Very nice scheme !
And, hum, think that guy will not have enough elevator...
When I see what goes up with 30° of throw, can't imagine what it will be with 80° !!!  ???

Wow...
"Flying is just the time between take-off and crash"

DannyChapman

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Re: Quark 2M - Back to cutting innocent trees!
« Reply #496 on: August 07, 2017, 22:14:59 PM »
Here's my Quark flying during holidays in Ireland (Kilkee Cliffs):

https://youtu.be/R_Inobt6fgY

It was lovely to fly. Unfortunately the receiver was glitchy so after a couple of scares I didn't dare fly any more.

Fred

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Re: Quark 2M - Back to cutting innocent trees!
« Reply #497 on: August 10, 2017, 07:41:01 AM »
That is some very good flying Danny!
Glad you like your Quark, and I hope you'll have fun with it for a very long time.

One day, I'll do a fibre glass version, I would love to try.
Education is important, but flying RC planes and gliders is importanter!

Nhalyn

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Re: Quark 2M - Back to cutting innocent trees!
« Reply #498 on: August 10, 2017, 09:03:56 AM »
Naaaaaah...  :( :-\ :'(

Not a good idea for me... The cool thing  8) with the Quark is that it is full wood build ! So easy to build, easy to repair, not sensible to small scratches and crashes  ;D, and durable.

A crack on the slope ? Just fill with thin cyano  :-X and continue to fly... Can't do that with fiberglass.

My Psycho 2 is currently in poor status with fuselage in 3 parts after a loss of talent during an inverted vertical reversement. Still to rebuilt, in fact I've built a Quark since this time...

A good improvement for the Quark : don't do that big holes in the rear fuse flank in order to make the fuse more torsional stiff. You will lost 10 or 15 grams on the final weight... Maybe 20gr ? On a glider that weights 1200 to 1600gr ??? That's the weak point of this glider...
"Flying is just the time between take-off and crash"

Fred

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Re: Quark 2M - Back to cutting innocent trees!
« Reply #499 on: August 13, 2017, 14:55:09 PM »
I know, I know  :-[  fundamentally, I agree with you totally :)
And the choice of wood may have also explain its success. "Easy" to build, affordable, easy to fix, and can be modify to suits your needs (make it very light, normal, heavy, electric, stiff etc etc).

I also like a 2.5 or 3m version (was designed to be 3m originally), but the 2 meters one is easier to transport everywhere :)

For the back holes, true, I can remove them on future cuts. Not sure how much you gain really in weight, as the balsa I use is very light. Less than 10 grs at the back I'd say. I'll have a look, but that is a very simple change :)
Education is important, but flying RC planes and gliders is importanter!

DannyChapman

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Re: Quark 2M - Back to cutting innocent trees!
« Reply #500 on: August 15, 2017, 12:23:53 PM »
Some of you might have encountered my R/C simulator (http://rowlhouse.co.uk/PicaSim/) which has a subtle bias towards gliders :) I've created a Quark for it, and have been setting it up following my flying time during holidays in Ireland. I think I'm pretty happy with it, though I'd need to fly the real thing again to confirm. Here's a video - flying in moderate winds, very little turbulence (less than I had in Ireland), and on a big hill:

https://youtu.be/nST_VUXO6mU

I'm not sure I'd dare try the crazy snap reversal around 0:36 but I'd love to know if it works on the real Quark!

If you want to/can test it so I can refine the behaviour, a Windows installer is here:

https://www.dropbox.com/s/dyuw8rtxsthk7dn/PicaSim-Installer-Quark1.exe?dl=0

I just noticed I haven't yet made a correct thumbnail for it in the description/selection part of the application.


johnfireball

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Re: Quark 2M - Back to cutting innocent trees!
« Reply #501 on: August 16, 2017, 01:15:37 AM »
Brilliant, love it, great, the most superb brilliant super biggest brilliant thing I've ever seen.

Donald Trump.

Well done, downloaded it, have to try. 
I have the body of an 18 year old.........I keep it in the freezer

Nhalyn

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Re: Quark 2M - Back to cutting innocent trees!
« Reply #502 on: August 17, 2017, 11:32:18 AM »
I also like a 2.5 or 3m version (was designed to be 3m originally), but the 2 meters one is easier to transport everywhere :)

I think that the 2 meters version is the best compromise for this aerobatic very dedicated glider.

Volume of the glider is not that small (big fuselage) and not that easy to hide in the car instead of madam wanting a calm week-end near that beautiful slope... ;D

More seriously, the 2m version can fly everywhere and you can have it always with you. Even on smallest slopes, even on high mountains with 30 minutes walk-to with other gliders on your bag, etc...

A 3 meters version should be really competitive and great but very big ! Not that easy to launch alone and not motivated to launch on weak conditions (where you will have a try with the 2 meters's)

In fact, if you look at history and to the "Voltij'" full composite glider from Toulouse manufacturer "Aeromod", it was a 2 meters class glider, a very good one (I've got one !). There was also a 4 meters version (scale 2 !) that was awesome, but it was no more an easy glider ! Weight was 12kg to 18kg dependant of pilots style, but was far better around 15kg, that means not self launchable on slopes, and even with help hard to launch. On flat field a big tow plane was needed, and it was an aerobatic only glider... It was very impressive to see it fly, like a big whale doing aerobatic effortissevely close to you. I even fly one, one or two times on a flat field, and it was a blast ! But that's the one that you fly only few times a year...

A 4 meters scale 2 Quark should be very fun builded very light like 8 kg... To fly on slope close to you... Based on my Quark weight, 1.6kg, a scale 2 glider should be around 8x this mass, that means 12.8kg... That's coherent with Voltij' experience but leads to the same conclusion... Fly not that much if you can't go to slope directly with your car and have not a good launcher or bungy ! :'(

Would prefer to have a big modern scale model like ASH26 at 5 meters... More polyvalent, can do thermal flight and high speed flight with aerobatics for the same weight...
"Flying is just the time between take-off and crash"

Beachy68

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Re: Quark 2M - Back to cutting innocent trees!
« Reply #503 on: August 25, 2017, 08:05:49 AM »
I've not posted before but found this thread a few months back when looking for a subject for my first ever balsa build. I decided to jump in at the deep end and cut all the parts myself and I'm pleased how it has turned out. The only thing that remains is to see if it will actually fly! I'll let you know....


Nhalyn

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Re: Quark 2M - Back to cutting innocent trees!
« Reply #504 on: August 25, 2017, 09:13:22 AM »
Very good job !  :-*
Looks fine, she should fly... :)
"Flying is just the time between take-off and crash"

Beachy68

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Re: Quark 2M - Back to cutting innocent trees!
« Reply #505 on: September 05, 2017, 20:32:02 PM »
She's now balanced and fully ready to fly. Just waiting for a bit of wind but as usual the weather isn't playing ball at the moment. I built everything as per the plan except for the wing where I used 10mm x 3mm spruce spars with a balsa shear web. The carbon tubes are therefore only used for joining purposes and so only go as far as the first 3 ribs which I made from 3mm ply. The total flying weight is 1.2kg which seems lower than most so I hope I haven't under built the wing or forgotten something important! This is my first ever balsa build so we'll see...

billscottni

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Re: Quark 2M - Back to cutting innocent trees!
« Reply #506 on: September 05, 2017, 21:01:43 PM »
Beautifully finished

Beachy68

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Re: Quark 2M - Back to cutting innocent trees!
« Reply #507 on: September 11, 2017, 20:31:19 PM »
Well, it flies! I went to Whitesheet Hill yesterday and finally tried my Quark out. Conditions weren't exactly ideal with 24mph winds gusting over 30, but I couldn't resist it. I'm glad to report although it wasn't ideal conditions, I could tell it flies really well. Landing was surprisingly easy with plenty of up aileron acting as spoilers. I'm really looking forward to flying it again in about half that wind speed which should be just about perfect!

jonboshoff

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Re: Quark 2M - Back to cutting innocent trees!
« Reply #508 on: November 04, 2017, 16:26:57 PM »
I am new to this forum but have been following it for a while now, as I have become hooked on VTPR flying, having built a Le Fish last year and having a ball with it.
My next project is the Quark 2m, and I have already cut the foam wing cores and plan to eventually glass the whole thing.
My question is this: What is the modified stabiliser airfoil section number, as I would like to cut foam cores for it (I know.....the wood version is perfectly good, but I want to try anyway!)
Any help would be greatly appreciated.

Fred

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Re: Quark 2M - Back to cutting innocent trees!
« Reply #509 on: November 06, 2017, 20:33:37 PM »
Hi there, and welcome to the forum :)

On top of my head, this is a NACA 009 (classic, nothing fancy :) )

Keep us posted with your progress! (The Quark was originally designed as a foam wing, FG gider!)
Education is important, but flying RC planes and gliders is importanter!