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Kai's "Shuriken" profile depron jet (now with video)

Old 03-07-2008, 07:08 AM
  #151  
headlessagain
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Thanks for your quick response. I'll make the mods prior to the maiden. I've built a number of 2mm correx Mugi Evo delta wings. The 600mm one was always a bit tail heavy and very twitchy. Whilst it was a blast to fly, I eventually de-commisioned it as it was difficult to launch and really needed a bungee to get it up to optimum airspeed. My first foamee is an Estratos which takes anything from a 1300 - 2200 3 cell lipo. With the latter its tail heavy but I just adjust my flying style accordingly. The Estratos has almost vertical climb and I'm using the same Hi model motor in my Shuriken so should have enough thrust.
For the Shuriken I'll dial in lots of expo & try low rates until I get 3 mistakes high. I'll let you know how things go but looks like the weather will be against me this weekend - 15 mph winds & showers.
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Old 03-08-2008, 10:18 AM
  #152  
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Carried out the mods last night and added a bit of colour. Looks much better and more balanced.
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Old 03-08-2008, 09:29 PM
  #153  
Kai_Shiden
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Looks good Headless, that should be a really rigid airframe like that.

-Kai
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Old 03-09-2008, 03:21 AM
  #154  
Kosh
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Those extended rudders even look pretty cool, Nice job on the build.
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Old 03-10-2008, 07:50 PM
  #155  
Warren T
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I copyed the plans. A real looker and when you bash it all up you can make another for a couple of bucks. We like it, We love it, We want more of it. Warren T

Originally Posted by Kai_Shiden View Post
Thanks for the good luck wishes guys,

Kosh, I really only made one template, the rest is actually all straight lines and measurements scaled up from the test glider (the one template I have is for the tailerons). If it flys well, I can very quickly make templates from it at the field with just some paper (would you believe, I've still not picked up any construction paper to make templates from :o).

The only changes that I might make, are cutting down the tailerons tips a bit if they start to flutter. The verticals are the shape they are to channel prop airflow, and to reduce the chance of the rudder flutter I had at high speeds on the SU (long surfaces that taper a lot will tend to twist more and can cause more flutter, the tall vertical stabs of the SU did that)

-Kai
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Old 03-21-2008, 03:43 AM
  #156  
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Finally managed to get the Shurikens maiden flight in today after replacing a servo that stripped a gear during trim adjustment. I was worried that after all the work something would go wrong and plough straight into the ground but happily it was perfectly balanced. Unfortunately due to impatience I choose the first windy day in a while so I had to stay on the ball to try and trim it properly. The first battery I used with my Stryker motor and ESC was a friends 11.1V 1200mAh 10C which just couldn't deliver the power top end. I then tried one of my 2100mAh batteries and moved it back slightly to balance the CG. Perfect flight and it seems to have a great top speed and balance. I had to cut the flight short as it started to rain and the wind gusts got a whole lot stronger.

Overall extremely happy with the design and greatly appreciate all the tips and pictures to help build it. Now that I know it flies well I'll add the rudder control surfaces and see if I can recreate some of Kai's acrobatics in the vid!
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Old 03-21-2008, 06:16 PM
  #157  
Kosh
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Impressive, I would have never thought about using a Stryker motor mount there but it fits great.

Well done, Kosh
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Old 03-21-2008, 10:33 PM
  #158  
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I had always planned to use the stryker motor mount but was so busy sticking exactly to the plans I forgot to allow for the motor mount dimensions. Amazingly it was perfect
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Old 03-23-2008, 10:35 AM
  #159  
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So I'm down the park and everythings going well for the first two batteries. Inverted flight not perfect as the servos don't seem to be aligned properly but no major issue. Just talking to a guy walking his dog who is interested in the plane and before you know it a bad case of pilot error and forget which way the plane is orientated.
pull up.....

NO not down!!!!!!!

RIP Shuriken

It was a pretty good effort and managed to bury one of the carbon tubes at least 5 inches into the dirt. Although it's pretty badly damaged the electrics are good and it's just time and a bit more depron to repair.
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Old 03-27-2008, 08:00 PM
  #160  
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Thumbs up Prop Upgrade

I put on a 3 blade prop (6x3x3EP) and wow! Big improvement in speed and power over the 5x5 I started with. Got it from:

http://www.gwsprops.com/3_blade_props.htm

My motor is a Welgard/Grayson 2212-06, 2200 kV. Only problem; I need a big field cuz it moves so fast. My posterboard Shuriken has had too many hard landings; so I'm just building another. I'm going to enlarge the underside verticals; Kai had said that was Ok when you run without rudders.
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Old 03-29-2008, 12:27 AM
  #161  
Jeff Waters
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Default EDF Shuriken with Gear

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Kai and Larry, trying the ducted fan again with sprung landing gear. Followed your advice and now all connectors are Deans type. Fan works well with 2 1300mah 3s batteries. Larry, I have a smaller FastCat that I want to install a ducted fan on but I'm not sure where the best place is. Up front with a clean airflow but a longer out tube, on the CoG, or at the rear where I would normally install the pusher prop? Can't wait for spring.

Jeff
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Old 04-07-2008, 06:06 AM
  #162  
Tram
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Kosh-

I am the one who shot you the PM on YouTube..

Did anyone ever wind up making the templates tiled?

Thanks!

Jeff
www.CommonSenseRC.com
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Old 04-08-2008, 04:44 AM
  #163  
Kosh
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Hi Jeff,

I did some hunting and found them on RCG at post #14 http://www.rcgroups.com/forums/showt...&highlight=kai

Lots of photos there also.

Kosh
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Old 05-07-2008, 05:35 AM
  #164  
Radbuster
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Thumbs up Second Build

I was too hard on my first Shuriken, so I built another. Haven't maidened yet--waiting for ideal conditions. I want this one to last a little longer. here's some show-off photos (without battery).

Went rudderless, again. Enlarged the lower verticals (per Kai's post). Thanks, guys, for all the build tips. Will report on performance later.
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Old 05-07-2008, 07:39 AM
  #165  
Kai_Shiden
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Looks good RadBuster,

I'm still flying the original prototype Shuriken (still haven't even splashed any color on it yet, LOL). I just ordered some smoke cartridges and holders from Hobby-Lobby, I hope to make a new vid of the Shuriken with smoke soon .

It's performance envelope hasn't changed much, although I believe it has more top speed now than it did before (refreshed to some newer battery packs).

-Kai
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Old 08-18-2008, 11:16 PM
  #166  
Radbuster
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Thumbs up Experience Update

This Shuriken is flying high and fast (see post above). I did have to move the antenna (72 MHz) from off the wing to off the tail. There is a discussion of this issue on an earlier page. To stop glitching, I ran it down the lower vertical, past the prop and then off the tail, under the elevon. Works great.

I'm still keeping it nose heavy for easier control. I'll inch it back for thrills later.



Originally Posted by Radbuster View Post
I was too hard on my first Shuriken, so I built another. Haven't maidened yet--waiting for ideal conditions. I want this one to last a little longer. here's some show-off photos (without battery).

Went rudderless, again. Enlarged the lower verticals (per Kai's post). Thanks, guys, for all the build tips. Will report on performance later.
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Old 08-18-2008, 11:25 PM
  #167  
Kosh
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I just built a new 24" version myself but its untested yet. The larger version allows me to spin a 7 inch prop that the 2000kv outrunner needs. Should get some flight testing in this weekend if the forecast holds.
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Old 05-04-2010, 09:36 PM
  #168  
Kai_Shiden
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Shuriken v2 on steriods in the works ....
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Old 05-04-2010, 11:28 PM
  #169  
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ooooohhhhh sexy!
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Old 05-05-2010, 12:35 AM
  #170  
Kai_Shiden
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Hehe, thanks Larry,

I'm to the point of hinging it tonight, I've decided on "Z" tape hinges (I knew them as barndoor hinges), but now I can't decide if I should bevel one of the edges or not (to have a single hinge line, instead of the typical double that an unbeveled barndoor hinge had).

I was trying to get it done for the NWEF swapmeet/BBQ this saturday in Redmond, but I'm not sure I'll finish it in time (annoying because I'm so close to completion now).

Attached are some of the other pics of the build (I wasn't taking many, but did snap a few off on occasion).

-Kai
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Old 05-05-2010, 03:25 AM
  #171  
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Default Aw right.

Looks awesome. The canard gonna have control surfaces?
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Old 05-05-2010, 09:08 PM
  #172  
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Originally Posted by Radbuster View Post
Looks awesome. The canard gonna have control surfaces?
Canards are fixed right now, but yes eventually when I have more time I'll come back and make them active control surfaces (luckily they are easy to work on after the fact, so I'm just putting off the original plan to have them full functioning till later).

-Kai
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Old 05-17-2010, 07:02 PM
  #173  
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I ended up ditching the canards, the weight gain to properly reinforce them wasn't worth it IMO (additionally they were interfering with the center of drag and causing trim changes at different speeds, so away they went).

My buddy Jaguar_5 took some pics of it in flight on saturday, so here they are.

-Kai
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Old 05-23-2010, 04:32 AM
  #174  
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Default Shuriken v2 test flights video

Jaguar_5 was nice enough to take some video of the v2 a little while back, it was only the 2nd day out testing it, so I don't have it tuned in all the way yet, but so far the flight characteristics are very promising.

(best watched on Youtube in HD)

-Kai
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