RE: 40% 260 on a Diet  
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RE: 40% 260 on a Diet - 3/4/2007 5:49:27 PM   
OnTheEdge



Posts: 1157
Joined: 1/14/2002
From: Drums, PA, USA
Status: offline 		Very clean radio install. Nice job!

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       Post #: 201

RE: 40% 260 on a Diet - 3/5/2007 1:55:14 AM   
Jleyland



Posts: 360
Joined: 11/22/2002
From: Doylestown, PA, USA
Status: offline 		Looks great Bob! I've heard that red covering both in monokote and ultracote is the lightest color. Do you know about how much wieght you saved using all red? (sorry if this has already been brought up)
It's awesome to see this come together.
ttys
Jon

(in reply to OnTheEdge)
       Post #: 202

RE: 40% 260 on a Diet - 3/5/2007 2:56:21 AM   
Jason 3-Danhakl


 

Posts: 102
Joined: 5/25/2002
From: Champaign, IL, USA
Status: offline 		Jon,
Bob had all this data at one time. We did come to the conclusion that Red covering is lighter than any other color besides the transparent colors. I tried to get him to use trans red but just didn't budge!!!
Jason
ps Why are you not flying the ETOC??

(in reply to Jleyland)
       Post #: 203

RE: 40% 260 on a Diet - 3/5/2007 3:02:58 AM   
sensei


 

Posts: 387
Joined: 7/16/2002
From: SAN ANTONIO, TX, USA
Status: offline
quote:

ORIGINAL: Jleyland

Looks great Bob! I've heard that red covering both in monokote and ultracote is the lightest color. Do you know about how much wieght you saved using all red? (sorry if this has already been brought up)

It's awesome to see this come together.
ttys
Jon


Here are the covering numbers for the 260.

Horizontal stabs 4 grams each.
Elevators 10 grams each.
Rudder 15 grams.
Ailerons 20 grams each.
Wings 75 grams each.
Fuse 160 grams.
Total 393 grams.
Now, I can't speak for the other colors but with the dark red; the clear backing weight was the same as the covering. I took one piece 36" x 55" for the wing and peeled the backing off. Both came in at 1.8 ozs. each, don't take my word for it; just try it.

Bob

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       Post #: 204

RE: 40% 260 on a Diet - 3/6/2007 2:12:08 AM   
sensei


 

Posts: 387
Joined: 7/16/2002
From: SAN ANTONIO, TX, USA
Status: offline 		Here are a couple more pictures, looks like with paint and Monokote on the canopy frame it is going to be every bit of 27 lbs. 8 ozs. The c/g is currently .375" behind the recommended c/g but I like them a little tail heavy.

Bob

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       Post #: 205

RE: 40% 260 on a Diet - 3/7/2007 9:13:24 PM   
sensei


 

Posts: 387
Joined: 7/16/2002
From: SAN ANTONIO, TX, USA
Status: offline
quote:

ORIGINAL: BBW Walt

I look at this with great "enthusiasm" as I take great lengths to realistically remove weight from my builds. The light side of a 40% Carden 260 is 37lbs with a DA150 with canisters. This plane can and has been done lighter but I think 37 a realistic light plane. Canisters add roughly 1-1/2 lbs. A DA 100 for all practical purposes weighs 6lbs and the 150 about 8lbs. Looking at this projected 28 lbs makes me wonder...37lbs minus canisters 1-1/2 minus 2lb engine weight comes to 34lbs with cowl mufflers. This leaves 6 lbs of wood and foam to remove from a already considerable light plane considering this was from a 37lb reference. How did you come to the 28lb target weight???This plane takes 29 sheets of sheeting to do the wings. Cardens stock for sheeting is roughly 1oz per sheet. Lets not sheet the wings so there's another 29oz's or 1lb 13 oz's. Still got 4 lbs to go from an already light number with no sheeting on the wings period..I wonder???Have you calculated this number out or is it just a guessed target..Regards Walt


I figure if you’re going to step up to the plate then swing for the fence, and sometimes you just have to think outside of the box to do that.

Bob



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       Post #: 206

RE: 40% 260 on a Diet - 3/12/2007 3:08:36 AM   
sensei


 

Posts: 387
Joined: 7/16/2002
From: SAN ANTONIO, TX, USA
Status: offline 		The 260 is finally finished and although I wanted it to be just a touch lighter the final weight is 27lbs. 15.4 ozs. The first flight is scheduled for next Saturday with video.

Bob

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       Post #: 207

RE: 40% 260 on a Diet - 3/12/2007 3:17:36 AM   
Jleyland



Posts: 360
Joined: 11/22/2002
From: Doylestown, PA, USA
Status: offline 		I can't wait for the video Bob!

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       Post #: 208

RE: 40% 260 on a Diet - 3/12/2007 3:31:39 PM   
gbrod


 

Posts: 69
Joined: 2/18/2003
From: bay harbor, FL, USA
Status: offline 		FANTASTIC work, congratulations and thanks for sharing it with us.
I hope it flies as good as it looks, good luck and keep us posted.
Happy flying
George

(in reply to Jleyland)
       Post #: 209

RE: 40% 260 on a Diet - 3/12/2007 6:06:06 PM   
sensei


 

Posts: 387
Joined: 7/16/2002
From: SAN ANTONIO, TX, USA
Status: offline 		Thanks guys,

Bob

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       Post #: 210

RE: 40% 260 on a Diet - 3/18/2007 4:13:56 AM   
260 Man


 

Posts: 60
Joined: 12/24/2006
From: San Antonio, TX, USA
Status: offline 		Well guys the maiden is done.......... All together seven flights today. The video speaks for itself........

http://www.icanflyrc.com/Tricityflyers/Tricityflyers2.asp


< Message edited by 260 Man -- 3/18/2007 4:10:24 PM >

(in reply to sensei)
       Post #: 211

RE: 40% 260 on a Diet - 3/18/2007 6:05:24 AM   
n8rloves2fly


 

Posts: 69
Joined: 1/14/2005
From: omaha, NE, USA
Status: offline 		WOW hats off!!

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       Post #: 212

RE: 40% 260 on a Diet - 3/19/2007 1:44:54 AM   
gbrod


 

Posts: 69
Joined: 2/18/2003
From: bay harbor, FL, USA
Status: offline 		Congratulations!
Can you speculate on the differences of flying compared to the more common 39lbs plane with a 150cc engine?
Thanks
George

(in reply to n8rloves2fly)
       Post #: 213

RE: 40% 260 on a Diet - 3/19/2007 2:32:47 AM   
sensei


 

Posts: 387
Joined: 7/16/2002
From: SAN ANTONIO, TX, USA
Status: offline 		Hello George,

I have owned and flown many 40% airplanes with 150s and 200s in the 40 to 50 lb range and this airplane has a completely different feel to it, alot like a foamy. I have not really begun to reach the limits of what I think it is capable of. The day I flew it a friend of mine had his Aeroworks 35% Yak with a DA 100 and the 90 degree up-line performance of the 260 was as good if not better than the Yak's up-line performance. I really need to get around 50 flights on it to give you an educated opinion.

Bob

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Fly It Like You Stole It!!!

(in reply to gbrod)
       Post #: 214