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Joined: 12/27/2006 From: Westford,
MA, USA Status: online
Is it wrong to enjoy the smell of a dremel wheel cutting through PVC?
I found a picture of a delta wing SPAD that I thought looked really cool, so I decided to imitate it. This thing has a 24" fuse, 36" wingspan, a music wire stiffener, and 8" stabilizers. I am planning on powering it with a .25
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Joined: 12/31/2002 From: Lakewood,
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Don't think a 25 will have enough power Most people are using 46 and 47 size engines on the CoroRoo and BullDawg. The pic of the CoroRoo You posted, has an ASP 52S with purple pipe running on an APC 11x9 and taking the manifold down to about 3" made a huge difference to the rpm! You can find the entire build thread and plans at( You'll have to register to log on ) http://www.spadcombat.co.uk/spad/ In the SPAD Builds and Construction forum on page (4) topic miniCororoo
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Joined: 11/20/2004 From: london,
ON, CANADA Status: offline
I think a .25 will be enough, look at my delta on post #3 of this link http://www.rcuniverse.com/forum/m_6960015/tm.htm it's a 36" span and weighs 43oz and it's only got a .15 on it, while it's not a rocket it does fly good.
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Joined: 12/27/2006 From: Westford,
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Thanks for the advice, both of you. My airframe is weighing in at about 28 ounces, with the elevon servos installed. It will be right around 2 pounds when I add the RX, battery, and throttle servo. With an engine, the weight should be pretty similar to Microsprint9's bird.
I know that most of the guys building these things are looking for extreme speed. I am looking for a fun flyer that looks different from my other planes. I have a couple of engine choices that I can borrow from other planes. I may try it with the .25FX from my combat spad, and if that won't fly it, I'll try the .46LA off my Four Star. I've been thinking of going to a four stroke on that plane anyway.
Here is a picture with the elevon servos, firewall, and some decals.
< Message edited by mclina -- 2/18/2008 1:15:57 AM >
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If all of your friends were named Cliff, would you jump off them? - Hugh Neutron
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Joined: 12/31/2002 From: Lakewood,
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quote:
ORIGINAL: mclina
Thanks for the advice, both of you. My airframe is weighing in at about 28 ounces, with the elevon servos installed. It will be right around 2 pounds when I add the RX, battery, and throttle servo. With an engine, the weight should be pretty similar to Microsprint9's bird.
Sorry, didn't realize You were building a CoroRoo Light version.
Hope to see a flight report soon.
If it flies as good as it looks I might have to build one too
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Joined: 9/11/2004 From: Denton,
TX, USA Status: offline
Looks like fun. It looks to me that the fold in the verts follows the fuse cut out. If that is so, they will act a bit like down elevator because they are basically a v-tail. Watch for that on launch. It might try to nose in on you. Take another look at the cororoo, and see that the fold in his verts is parallel to the wing. Good luck with the maiden.
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Joined: 12/27/2006 From: Westford,
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quote:
ORIGINAL: kbear
Looks like fun. It looks to me that the fold in the verts follows the fuse cut out. If that is so, they will act a bit like down elevator because they are basically a v-tail. Watch for that on launch. It might try to nose in on you. Take another look at the cororoo, and see that the fold in his verts is parallel to the wing. Good luck with the maiden.
Good catch. I missed that.
Any advice on where the CG should be on this thing?
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If all of your friends were named Cliff, would you jump off them? - Hugh Neutron
I mounted the engine and fit the RX and battery inside the fuse. I reworked the stabilizer mounts to level them out, but they are still a bit crooked. I have a bit of work to do to straighten them out, or I may go back to the drawing board back there.
With everything on it except a couple of screws and pushrods, it weighs exactly 3 pounds. The way our weather's been, it could be a month before this thing gets in the air anyway.
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If all of your friends were named Cliff, would you jump off them? - Hugh Neutron
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Joined: 12/31/2002 From: Lakewood,
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When Your building a new design some people can't handle it and would rather put You down instead of encouraging You to succeed. Don't let it get You down. Sounds like Your getting close to the maiden flight. Eagerly waiting the flight report. As for the vert stabs, on the CoroRoo they put coat hanger wire in them to get them to hold there shape. You could also just make a "V" tail out of one piece of coro for the tail feathers. Jeff
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Joined: 12/27/2006 From: Westford,
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I like the V tail idea. The whole back end is a bit floppy as is. I glued in a piece of yardstick to stiffen it, but if I made a big V out of the stabs, it would tighten it right up.
Thanks
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If all of your friends were named Cliff, would you jump off them? - Hugh Neutron
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