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Old Mar 19, 2010, 01:22 AM
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I was about to say I think your Scythe might end up being a tad porky but I dunno. Try and keep it as light as possible. That's a much bigger motor and battery then I was going to use on mine. But it's been shown that Lee's wings will fly even when they're many ounces heavier than is recommended!
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Old Mar 19, 2010, 03:31 AM
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What do those 9103MG servos actually weigh? I'm guessing 10g but couldn't find any reliable data.

250g with all that massive gear must have to really truck along to keep flying! I bet it'll work if it balances properly though.
Old Mar 19, 2010, 01:39 PM
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The beta test price on the Scythe goes till the end of the month.

http://www.crashtesthobby.com/index...._17_The-Scythe

If you want to get in on this deal order now.
Old Mar 19, 2010, 09:01 PM
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Here's another vid of the scythe. I had an issue with the cg so I changed my motor mount to a plastic stick mount. It moved the wt forward a little and flew great until the motor got hot enough loosened the mount and fell out ( this wing glides great power eerr motor off lol) so I reinstalled the original mount moved the Rx forward now all is good.

Scythe2 (3 min 11 sec)
Old Mar 21, 2010, 11:41 PM
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Nasty weather yesterday so I got to finish the Scythe. Better weather this afternoon so I got to throw it up. Mid 40's with about 10mph winds. First flight, trim was about right but once in the air I saw I forgot to add the winglets. Slow speed was shaky but flew fine at full throttle. I was surprised I wound up at 8.5 ounces since the compnents are relatively light. Berg4 receiver, Castle Phoenix 10, GWS pico servos, and 37 grams for the motor, motor mount, prop and adaptor. Since I was expecting a lighter weight I got 6 @ 2s 500mah pack from HC (very little to choose from at the moment). I used 2 packs in parallel to get the CG far enough forward. After trying an assortment of props, my favorite APC 6x4E seemed to work the best. Goes straight up but still zips around at good speed. Wingspan is 30.25".

Attached are some photos, notice this is a work in progress!

I used the scraps from the elevons as the winglets. I think I may need something a little larger. Any comments?
Old Mar 22, 2010, 06:04 AM
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Quote:
Originally Posted by Vince53 View Post
Nasty weather yesterday so I got to finish the Scythe. Better weather this afternoon so I got to throw it up. Mid 40's with about 10mph winds. First flight, trim was about right but once in the air I saw I forgot to add the winglets. Slow speed was shaky but flew fine at full throttle. I was surprised I wound up at 8.5 ounces since the compnents are relatively light. Berg4 receiver, Castle Phoenix 10, GWS pico servos, and 37 grams for the motor, motor mount, prop and adaptor. Since I was expecting a lighter weight I got 6 @ 2s 500mah pack from HC (very little to choose from at the moment). I used 2 packs in parallel to get the CG far enough forward. After trying an assortment of props, my favorite APC 6x4E seemed to work the best. Goes straight up but still zips around at good speed. Wingspan is 30.25".

Attached are some photos, notice this is a work in progress!

I used the scraps from the elevons as the winglets. I think I may need something a little larger. Any comments?
maybe try the signature angled assasin cut on the wing to see if that helps your stability??

mk
Old Mar 22, 2010, 06:22 AM
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My favorite fin material is the thin plastic covers off of the cheap three ring binders that you can buy at Walmart or local office supply stores.

This is one of my old Pinata fins. Tape goes through the middle to the top and bottom of the wing and I put a piece of tape around the leading edge and along the bottom edge.

These are thin wings. I would love to have them fly well without fins. I suspect that they will fly better with the fins. I have one built finless I am trying. I have 4 of the Scythes built ready for radio.
Old Mar 23, 2010, 01:07 AM
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Old Mar 23, 2010, 10:36 PM
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Sweep?


Guys, I'm building a couple of Scythes with a co-worker (so I have someone to combat with) and was wonder what sweep I should use? I have an Assassin which I've only flown a few times (and love it) so I'm new to flying wings (have a superfly and hyperflea so am pretty familiar with elevons and delta pushers). I would like a sweep which is suitable for a couple of rookies to fly with. Should I just go with the sweep as they come from Lee or should I be changing it? Thanks in advance!

Nathan
Old Mar 24, 2010, 01:53 AM
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I shouldn't be flying either!!
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Hey Guys, I built "Scott's scythe". As Lee said it flies pretty good the way its set up. I noticed he left a couple of things out. The prop is a 4.75x4.75. The total weight is 9.5 ounces w/battery. As for the servos, I never weighed them before installing them (I was to excited to put it together after waiting two weeks for parts). The next one I build I will increase the sweep, but not by to much. I think that would make it roll better and add more stability. I built a little heavy but wanted to keep it as a combat model. Just remember the lighter you build the less advantage you have with the wind. I love the micro wing and find that I fly it freestyle much more than the larger wings. Hey Lee post the video you shot the other day of the scythe in action.
Old Mar 24, 2010, 02:06 AM
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The story goes something like this. I was putting Windows 7 on my computer and the computer ended up being reformatted. It's a long story with a couple of silly errors but in the process I decided to upgrade my video editor so I have video I am waiting to edit. Did I also mention we broke a pipe in the house?

Only one of my wings is stock sweep. I swept the other 3 more. You are supposed to build them in different ways. That is the idea!!!

I am pleased how well the Scythe glides and flies. Please post video when you get flying!!!

Lee
Old Mar 26, 2010, 01:16 PM
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This video shows Scott's Scythe flying on 2S 1000 mA lipoly. It will go vertical on 3S with the following set up.


Scythe Beta Testing with the following: This is not ultra light build but a combat build between 8-9 oz.

Battery - http://www.hobbycity.com/hobbycity/s...idProduct=6470 or http://www.hobbycity.com/hobbycity/s...idProduct=7449
Motor - http://www.hobbycity.com/hobbycity/s...80kv_%2827g%29
Motor mount - http://www.hobbycity.com/hobbycity/s..._%2843/42mm%29
Servos - http://www.hobbycity.com/hobbycity/s...0.8kg_/_.12sec
ESC - http://www.hobbycity.com/hobbycity/s...rogrammable%29
Push rods and plastic clevis' stock Parkzone ultralight.
Standard horns pushed through elevon from bottom.


Scott's Scythe prototype 3-10 (2 min 42 sec)
Last edited by Lee; Mar 26, 2010 at 02:04 PM.
Old Mar 26, 2010, 07:54 PM
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Lee I was looking for an editing program and I saw that you liked power director, so I downloaded and tried it. I like it alot, been playing with some of the features.

Scythe Night (3 min 30 sec)
Old Mar 26, 2010, 08:21 PM
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Here are a couple of Titan videos I just did.


Scott's Titan flash 3-10 (3 min 26 sec)


This video was from one flight on one battery from launch to catch.

The Titan is a nimble plane for being finless and having a 60" wingspan.

Titan high stress maneuvers 3-10 (3 min 15 sec)
Old Mar 28, 2010, 12:09 PM
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TJ told me there were 4 kits that went out without the foam for the motor mounts in the box. If you are one of those, and are planing on using the foam for the mount, contact us through our website and we will get the foam wedges to you.

Scott is already having some servo problems with one of his small servos. As usual the servos have become a reliability question. One servo listed in the original parts below has started to move slower than the other giving some unpredictable stick response so be careful with this servo. http://www.hobbycity.com/hobbycity/s...0.8kg_/_.12sec

I am building 4 of these kits now with each one different than the others in sweep and span. I decided to use some of the HXT900s because I have a bunch of them in stock and the plane is so light. I also have some HXT500s I went with the heavier servo because of the way I fly. The servo has to be laid on it's side to fit in this thin wing. I am going to design a "Z" bend shock absorber to protect the nylon gears in those servos. I have used the HXT900s servo in some Capricorns and Snowballs and other than a couple of stripped gears they have worked better than the HS55s from Hitec.

HXT500/HXT900 links:

http://www.hobbycity.com/hobbycity/s...A_Warehouse%29
http://www.hobbycity.com/hobbycity/s...ec_Micro_Servo
http://www.hobbycity.com/hobbycity/s...ec_Micro_Servo

Battery - http://www.hobbycity.com/hobbycity/s...idProduct=6470 or http://www.hobbycity.com/hobbycity/s...idProduct=7449
Motor - http://www.hobbycity.com/hobbycity/s...80kv_%2827g%29
Motor mount - http://www.hobbycity.com/hobbycity/s..._%2843/42mm%29
Servos - Yet to be determined.
ESC - http://www.hobbycity.com/hobbycity/s...rogrammable%29
Push rods and plastic clevis' stock Parkzone ultralight.
Standard horns pushed through elevon from bottom.


Lee
Last edited by Lee; Mar 28, 2010 at 04:36 PM.


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