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Old Nov 15, 2012, 10:16 PM
chuck
santa barbara, CA
Joined May 2009
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Quote:
Originally Posted by PeterVRC View Post

Gee... reminds me of the 'good old days'..... control-lines in the mid 70's....
Cox PT-19's..... and home-made flying wings etc.
yep!!greesey kid stuff
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Old Nov 15, 2012, 11:08 PM
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DerekB's Avatar
Cape Coral, FL
Joined Nov 2001
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Quote:
Originally Posted by WhalleyB0Y View Post
Hey guys, I might be dating myself here but what is a control line?
The easiest way to answer this is a link to Wikipedia's Control Line article.

Basically the model flies in a big circle attached by a pair of 50 foot or 60 foot lines to a handle. The lines control only the elevator. The pilot holds the handle and you tilt the handle up for up elevator and down for down elevator. It sounds "simple" at first, but the competition events and numerous variations are quite challenging. Traditionally, a glow engine is used with no throttle control, just wide open until the fuel runs out. Recently, electric prop systems are coming into the scene. EDF's are almost unheard of.

Some example videos:
Precision Aerobatics
Combat

I was just trying to "break the mold" and use a foamie EDF .

Here's my build log for the BAE Hawk with the CS 10 blade. Actually, much of it relates to the fan, ESC and battery installation which applies the same for R/C.

Derek
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Old Nov 15, 2012, 11:21 PM
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anlucas's Avatar
Greece, Attica, Athens
Joined May 2011
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Great stuff Derek!!!!

How's your dad liking this new EDF stuff....???

That BAE Hawk sounds great.
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Old Nov 15, 2012, 11:24 PM
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Canada, BC, Surrey
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Wow that was entertaining to watch. Thanks for the explanation.
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Old Nov 15, 2012, 11:28 PM
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Australia, VIC, Melbourne
Joined Nov 2006
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Oh yeah... COMBAT!!! That used to be FUN !!!
Collisions.... twisted control lines...... chaotic fun!
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Old Nov 15, 2012, 11:49 PM
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Canopys held with magnets always fly off .I see guys out in the cornfield or tall grass for hours looking for their canopys . Make up a latch I say ..
Quote:
Originally Posted by DerekB View Post
Just when you thought there was nothing more to say about the CS 10 blade fan......

Some of you know about my project to convert the BAE Hawk from Hobby King to Control Line for my Dad, and use the CS 10 blade 70mm fan of course with the Turnigy L2855 2800 Kv motor on 4S. Dad only flies control line and really likes EDF's. He did a conversion himself with the F9F Panther from Hobby King, but it ended up to be a 3.5 pound brick. So I had to "show him how to do it". The Hawk is similar size and mine came in at 2.0 lbs AUW with 2.2 lbs thrust.

I shipped the Hawk up to him in PA, then visited last week to do final assembly and maiden flights. It was a great time!! Really - no kidding. Control Line of all things!

You gotta keep in mind that most guys who fly control line are "old school", so this was like bleeding edge technology. Here's the video from my visit.

The fan unit was not as balanced as I would like, but I was more concerned to just make it work !!

Derek

http://www.youtube.com/watch?v=1XDV2W6XcLE
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Old Nov 16, 2012, 09:46 AM
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Canada, BC, Surrey
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Great Video Derek!
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Old Nov 16, 2012, 10:09 AM
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Cape Coral, FL
Joined Nov 2001
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Quote:
Originally Posted by anlucas View Post
Great stuff Derek!!!!

How's your dad liking this new EDF stuff....???

That BAE Hawk sounds great.
Oh, he's just drooling over it. And using the transmitter for throttle control is like icing on the cake. Control Line tends to be very "traditional" and the purists want to only use lines, which I can understand (just like the free flight guys - purist). Dad was using a 3rd line from the handle to move a potentiometer inside the airplane, which emulates a throttle signal to the ESC. It was clunky at best. The AMA recently approved the use of 2.4 GHz transmitters for Control Line to control functions other than the elevator, such as throttle. As far as I know, I am among the first wave to be using this.

You know how we RC guys have our "BIG" events each year, well Control Line does too at Brodak's. Dad has gone several years and never saw any kind of ducted fan there. So he's really excited to take his this Spring for a demonstration flight.

I may put together another one for him . Maybe a twin like the A-10 Warthog. Twin glow engines on control line with throttle control are a nightmare. But as we "RC Guys" know, an electric R/C twin is a piece of cake .

It needs to have relatively light wing loading, since there is such a short "runway" launch ramp. Any other suggestions for a twin 70mm with light wing loading?

Derek
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Old Nov 16, 2012, 10:49 AM
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Greece, Attica, Athens
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Quote:
Originally Posted by DerekB View Post
It needs to have relatively light wing loading, since there is such a short "runway" launch ramp. Any other suggestions for a twin 70mm with light wing loading?

Derek
Does it have to be 70mm?

Two A-10 options from HK and HK is bringing a 10blade 50mm EDF out.....

http://www.hobbyking.com/hobbyking/s...F_ARF_Kit.html

http://www.hobbyking.com/hobbyking/s..._EDF_ARF_.html

There are other versions for 64mm as well...

I have the 50mm above and it is nice with balanced 50mm units.

The 75mm is slightly larger and has more detail.... plus you can fit the CS10 to it...
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Old Nov 16, 2012, 01:46 PM
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10 blade 50mm? When
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Old Nov 16, 2012, 02:30 PM
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anlucas's Avatar
Greece, Attica, Athens
Joined May 2011
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Quote:
Originally Posted by stingeragents View Post
10 blade 50mm? When
Sorry for the off-topic guys...

HobbyKing Daily - 50mm EDF Unit (1 min 38 sec)
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Old Nov 16, 2012, 07:37 PM
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RockApe's Avatar
Sydney, Australia
Joined Aug 2004
87 Posts
12 Blade CS 70mmm EDF

Has anybody seen these yet?

Just bought two for my Windrider 737...

http://x-flight.com.hk/index.php?p=6...2=&cat1=&dis=#

Oh and the alu cones:
http://x-flight.com.hk/index.php?p=6&id=177&lang=en
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Last edited by RockApe; Nov 16, 2012 at 07:39 PM. Reason: more info
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Old Nov 17, 2012, 10:16 AM
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St. Martin's Avatar
Skunk Water, Rhode Island
Joined Jul 2002
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I can see it now, a 10K reply thread on the 12 blade!

Fuzz
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Old Nov 17, 2012, 01:28 PM
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MRGTX's Avatar
United States, CT
Joined Aug 2005
1,936 Posts
Quote:
Originally Posted by RockApe View Post
12 Blade CS 70mmm EDF

Has anybody seen these yet?

Just bought two for my Windrider 737...

http://x-flight.com.hk/index.php?p=6...2=&cat1=&dis=#

Oh and the alu cones:
http://x-flight.com.hk/index.php?p=6&id=177&lang=en
I just placed my order for the standard 12 blade!
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Old Nov 17, 2012, 02:30 PM
It should fly at least once
clive45's Avatar
Australia, NSW, Grenfell
Joined Mar 2006
2,588 Posts
Just ordered a 70mm 12 blade and cone to play with...................should be interesting to see what sort of performance difference against the 10 blade
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