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Author Topic: Howitzer Kite - Video Preview  (Read 2741 times)
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KiteChemist
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« on: July 12, 2012, 06:47 AM »

After 3 months of testing and adjustments and two versions built and tested (.N and .U, STD and UL respectively) and one coming soon (.S , i.e. SUL) i decided to show the project.

This kite is a polyvalent with 244 cm wingspan and 94 cm height. It does outperform in precision many commercial kites and has good trick ability. In particular this kite make slow precise lines, sharp corners and has a very good with range and wind window. The pull is medium/high... nirvana style, the oversteer is reduced to minimum and the kit mantains good wind pressure even in the lower range. Tricks are slow but well defined and elegant, in partucular slot machines, half axels, tazs, with only the 540 requiring a bit more slack than expected to avoid with tip wraps. Jacob's ladders are stupid easy and will return on fade even with the nose too high respect to the tail, easy flic flacs, stable fade, stable backflip and good lazy susans, with a bit of care required for multilazy to avoid excessive over-rotation into yoyo. Backspins are also stupid easy and forgiving. This kite also does frenchflicflacs and wapdoowap without problems. Cometes are quite easy too. Yoyo's are not very fast but quite good and can be done in one pop both in .N and .U versions (the .U , UL, is a bit slower). Also landings are sharp and precise, due also to frame stiffness. THe kites have very high inertia but the weight sail load is quite low so the .N can be flown without backstepping with winds as low as 8kmh of wind, and the .U is already in pressure at 5kmh. I have choosen a very high fill factor for this kite, but to avoid excessive pull or speed i chose a high discharge area as well (long standoffs), resulting in good wind range, moderate pull and slow constant speed.

The .N (STD) version is framed :
Spine: 5pt
Upper spreader: 6mm structil
Lower Spreader: Black Diamond Nitro Strong
Upper Leading Edge: 5pt
Lower Leading Erge: Black Diamond Nitro
Reverse turbo bridle
23g tail ballast

The .U (UL) version is framed :
Spine: 5pt
Upper spreader: 5mm structil
Lower Spreader: 5pt
Upper Leading Edge: 3pt
Lower Leading Erge: 3pt
Reverse turbo bridle
17.5g tail ballast

The forecoming .S (SUL) version will be framed:
Spine: 3pt
Upper spreader: 4mm structil
Lower Spreader: 3pt
Upper Leading Edge: 2pt
Lower Leading Erge: 2pt
Reverse turbo bridle
10g-15g tail ballast
(for extreme low wind range 2pt lower spreader and no tail ballast)

Photos:
https://picasaweb.google.com/116440615366198099089/HowitzerNSTD?authkey=Gv1sRgCNqvvvGp9aLp7wE

Video previews:
Test Howitzer

(gusty wind, buildings upwind) 17.5g tail ballast

Test dell'howitzer in versilia.

(sea wind, lower wind range) 20g tail ballast



« Last Edit: August 29, 2012, 02:12 AM by KiteChemist » Logged
Tmadz
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« Reply #1 on: July 12, 2012, 10:57 AM »

Very nice looking. Watch out for those cacti. Don't need any holes in your sail
« Last Edit: July 12, 2012, 11:06 AM by Tmadz » Logged
red sweater
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« Reply #2 on: July 12, 2012, 11:05 AM »

Is that how all these "pinholes" I see on swap meet kites get there? Wink
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My bag:
HQ Breeze, Silver Fox 2.3 Pro UL, Nirvana Std, Prism Quantum
ITW Mesa DC, Premier Popper Line Climber
Rev EXP
KiteChemist
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« Reply #3 on: July 12, 2012, 03:37 PM »

Very nice looking. Watch out for those cacti. Don't need any holes in your sail

They are quite distant  Wink , i dont allow cactus too close to my sailworks  , i had already one hole fixed in my UL in the outer panel (during assembly a spar got out of control punching through the sail, fixed replacing the panel)


Is that how all these "pinholes" I see on swap meet kites get there? Wink

 Smiley


Be sure to check my FB page for updates : https://www.facebook.com/pages/Scientific-Kite-Designs/378443318837274
« Last Edit: July 12, 2012, 03:58 PM by KiteChemist » Logged
Tmadz
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« Reply #4 on: July 12, 2012, 05:33 PM »

I was talking about the cacti on your patio in the photos, but same difference.
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KiteChemist
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« Reply #5 on: July 13, 2012, 12:36 AM »

Yeah, I did get it  Smiley
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KiteChemist
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« Reply #6 on: August 01, 2012, 01:49 AM »

This is the photo of the SUL version Howitzer .S

https://picasaweb.google.com/116440615366198099089/HowitzerSSUL?authkey=Gv1sRgCNXn3fW9spvFPA#5768441849361908434
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JimB
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« Reply #7 on: August 01, 2012, 09:59 PM »

That's nice.

What's the fabric?

Love the name too.

Wink
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KiteChemist
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« Reply #8 on: August 02, 2012, 02:16 AM »

AirX500 for the white parts and icarex pc31 for the coloured parts. All the howitzer have the same fabric scheme. I wanted to have the airx-500 on the keel and wings to boost precision in the low wind flying since the fabric deforms a bit in an airfoil shape under wind pressure or when pumping the kite.
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KiteChemist
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« Reply #9 on: August 29, 2012, 02:10 AM »

Some video Preview of Howitzer .88 (scaled version for tricks)

http://youtu.be/9t3GxeiWkM4

And some preview of the UL version (named Howitzer .U)

http://youtu.be/PMSIFWMTiF4


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red sweater
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« Reply #10 on: August 29, 2012, 07:27 AM »

Some video Preview of Howitzer .88 (scaled version for tricks)

http://youtu.be/9t3GxeiWkM4

And some preview of the UL version (named Howitzer .U)

http://youtu.be/PMSIFWMTiF4





"Your eyes, your eeeeyeeeesss...."
Indeed, my eyes! Swim. Trunks.

The kite looks great and seems to handle quite well. If only I could do any of those tricks. "Stupid easy" must be a relative term. Tongue
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My bag:
HQ Breeze, Silver Fox 2.3 Pro UL, Nirvana Std, Prism Quantum
ITW Mesa DC, Premier Popper Line Climber
Rev EXP
KiteChemist
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« Reply #11 on: August 30, 2012, 12:11 PM »

Yes, it is quite easy to handle despite being a small trick kite.  Many tricks are very fast but still controllable and can be executed slowly if needed. The precision is also good for a trick kite. The kite, like some other rescaled polivalents (NFX Extend, NSE15 and so on), keep some of the original flying performance but the trick performance is more extreme.  Smiley

The regular sized versions (.N = STD, .U = UL , .S = SUL) are much slower in tricks but the precision is very high.
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KiteChemist
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« Reply #12 on: September 10, 2012, 07:57 AM »

Those are the photos of the trick version of the Howitzer  ( the Howitzer .88)

https://picasaweb.google.com/116440615366198099089/Howitzer88?authkey=Gv1sRgCIegiMuKudSM4wE#
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KiteChemist
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« Reply #13 on: January 10, 2013, 06:20 AM »

The last version of the Howitzer is the light rescaled (.88) version namely .88S (rescaled to 88% SUL). It has the same sail of the howitzer .88 standard version but is framed ZeroAir-P1X on the leading edge, P90 Spine, 2pt Lower Spreader and 4mm upper spreader, 12g tail weight.

https://picasaweb.google.com/116440615366198099089/Howitzer88S?authkey=Gv1sRgCLzTs6rUrpiK_gE

Here a small video of the kite in action, it is a taz monster and very forgiving in most tricks, can yoyo in one pop and veighs 175g x 215 x 85

www.youtube.com/watch?v=1hYeSSAtuuY
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KiteChemist
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« Reply #14 on: June 10, 2013, 01:52 PM »

Another video with the Howitzer .88 in very low wind


Howitzer .88 in low wind



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