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Old Jan 21, 2012, 12:44 AM
Wood Chucker
Lacquerhead's Avatar
USA, TX, Allen
Joined Nov 2009
1,508 Posts
Schrederman's carbon keel

I realize the thread I'm citing here is pushing 8 years old but has this carbon keeled hold down evolved since then?

http://www.rcgroups.com/forums/showthread.php?t=269207

I've got the tailfeathers for my BoT built and I'm starting to cut new parts from lighter wood for the fuse so I can begin assembly of that. That means its time to start planning for the wing construction. I don't want to do rubber bands so bolts it is. Jack's carbon reinforced keel looks like what Tim Bennett was describing to me a few years ago and I'd rather have a solid center section and detachable tips simply for mechanical peace of mind.

Thoughts, critiques, etc. all welcome as always!

Tim in TX
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Old Jan 21, 2012, 10:19 AM
AMA 3959
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United States, CA, San Jose
Joined Oct 2002
1,470 Posts
I am getting started on my Oculus! Man, it's nice working with some wood again Got the garage cleaned and heated

Al
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Old Jan 21, 2012, 11:47 AM
Wood Chucker
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USA, TX, Allen
Joined Nov 2009
1,508 Posts
Mornin' Al. Interesting side-shelf reading there. Warbirds, Hot Rods, AC Cobra (I'll build a kit car version one of these days) and sticking out between them all, right where you can barely read it, "Stay Safe". Good thing to remember when you break out the sharp pointy things after a long break.
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Old Jan 21, 2012, 07:00 PM
Registered User
David Forbes's Avatar
United States, FL, Gainesville
Joined Dec 2005
2,900 Posts
Al,
Nice tool box, those things are a fetish with me, I've collected a few
Dave
PS, every respectable home shop machinist should have a lathe and a mill. My lathe at least conforms to the standards of the War Production Board according to the plate riveted on, probably WWII
Getting my shop cleaned and organized, rather have it cooled than heated, but that won't happen.
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Old Jan 21, 2012, 07:58 PM
AMA 3959
alstrahm's Avatar
United States, CA, San Jose
Joined Oct 2002
1,470 Posts
@Don,they will pry that box out of my cold dead hands! Bought it for $100 in the 70's

@Lhead, already built the Cobra replicar
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Old Jan 21, 2012, 08:05 PM
ein flugel schplinterizer
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USA, FL, Pensacola
Joined Sep 2004
5,088 Posts
Wow, just wow Al! My neighbor has one the same colors. My wife gets all weak in the knees when he drives it by.

Did you see that video on Yahoo this week where the guy is running one at 130 with a GoPro camera and, according to him, something in the steering let loose? Rolled it 3 times, it was a mess.
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Old Jan 21, 2012, 08:34 PM
Speed cost money.
highflier's Avatar
United States, FL, Marathon
Joined Dec 2002
3,045 Posts
Did I miss something a few postsback about spar/wing strentgh on a electric plane. I would think the spar does not need to be anywhere near as strong. Ya it has a higher wing loading but the highstarts stress them so much more then a in flight manuver should.

Highflier
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Old Jan 21, 2012, 09:18 PM
ein flugel schplinterizer
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USA, FL, Pensacola
Joined Sep 2004
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Don't know Highflier. I think a lot of people worry too much about wing strength (totally a personal opinion). I mean sure you want it to have continuity through the structure but how hard do you actually need to launch? If you get into doing wild aerobatics or want to come screaming down from a thermal maybe but............I haven't broken a wing in ages and I get comments about my launch height. I wonder if we wil hit a point where technique comes back into play? I guess it's just me but I cringe watching guys stall winches or have to do that deeeep zoom at the top. It's fun if that's what you want to do, but............never mind, I've said too much already.

OK, one last thing (and Ray Hayes please comment), Were we breaking that many wings back in the 70's/80's trying to get long flights, or is my memory shot?
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Old Jan 21, 2012, 10:07 PM
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United States, CA, Santa Ana
Joined Jul 2010
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As we learned to make better winches, we also had to build stronger wings. Older weaker models broke in the process of learning.

ross
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Old Jan 21, 2012, 11:17 PM
ein flugel schplinterizer
seanpcola's Avatar
USA, FL, Pensacola
Joined Sep 2004
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Quote:
Originally Posted by harborflyer View Post
As we learned to make better winches, we also had to build stronger wings. Older weaker models broke in the process of learning.

ross
Been there, done that, own the T-shirt factory. I still say finesse works just fine.
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Old Jan 21, 2012, 11:43 PM
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United States, CA, Santa Ana
Joined Jul 2010
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In most cases i think it was dumb pride trying to beat the winches, also going from 100# line up to the 300 to 400 used in contests now.

ross
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Old Jan 22, 2012, 12:05 AM
who has rabbit ears down
Captain Canardly's Avatar
United States, MN, Buffalo
Joined Jan 2007
3,668 Posts
400 LBS???!!
And i have a 4 lb cat that messed up my computer for the day!!
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Latest blog entry: One printer running!
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Old Jan 22, 2012, 12:11 AM
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United States, CA, Santa Ana
Joined Jul 2010
470 Posts
Visalia Fallfest in oct they use 400# line, and some of our SC2 clubs also.

ross
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Old Jan 22, 2012, 12:12 AM
Making wood fly since 2007
Windependence's Avatar
USA, MN, Rochester
Joined Mar 2008
2,533 Posts
Don't ask me how I found this but here is a little time warp back to the 70's. All the launches look mild by today's standards and not a zoom to be seen. I enjoyed watching it, I hope you do too.

RC Soaring in the Seventies 1 of 6.avi (15 min 34 sec)


Wayne
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Old Jan 22, 2012, 12:33 AM
Registered User
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United States, CA, Santa Ana
Joined Jul 2010
470 Posts
That is when i started out i RC and gliders. All that fun with blue, orange, brown, channels and waiting for your pin!

ross
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