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Old Oct 06, 2012, 03:02 AM
I am actually really slow
SlowBarless's Avatar
Brisbane
Joined Jun 2008
961 Posts
Help!
Discus launch F5D!?!

Quick! Someone try to talk me out of it, my throwing arm is ready
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Old Oct 06, 2012, 05:40 AM
"The Judge"
sebbe's Avatar
Sweden
Joined Feb 2006
5,792 Posts
Dont know if the force will be to much for the wing/fuse where it sticks together as an F5D weighs much more then a F3K ship... but could work ,,,,, and isnt there some extra reinforcments in the wing where you hold the plane ?
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Old Oct 06, 2012, 05:51 AM
I am actually really slow
SlowBarless's Avatar
Brisbane
Joined Jun 2008
961 Posts
Good points, an F5D airframe is a lot stronger then an f3k model also, so it might manage the stress just fine. I'd be reinforcing the wing tip before I try! Will be adding some fin area also.

How many people think I'm crazy for even thinking this?!?
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Old Oct 06, 2012, 06:38 AM
"The Judge"
sebbe's Avatar
Sweden
Joined Feb 2006
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think its a pretty good idea as you get a hard throw , this way you would avoid those torques when you hit the throttle as the plane will be high in air.... but there is always an,, IF...
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Old Oct 06, 2012, 07:46 AM
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the seventh planet
Joined Dec 2010
494 Posts
throwing it right handed might put into a snap with the power on it could roll violently
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Old Oct 06, 2012, 08:11 AM
I am actually really slow
SlowBarless's Avatar
Brisbane
Joined Jun 2008
961 Posts
Launch would be with power off I'd imagine. Already thought of reverse running props to counter throw induced roll if necessary.

Would this style launch be permitted in the f5d rules?
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Old Oct 06, 2012, 11:04 AM
One Idiot is plenty...
Dbox's Avatar
Planet Earth
Joined Jun 2005
5,156 Posts
I have done it once and would not recommend to anybody,experienced or not.
Have to say ,I been practicing DLG launches,with DLG planes, since 1997 ,so not a beginner in technique.
Totally different behavior for F5D plane ,for many many reasons.
I will mention just one- all F5D planes have about 3 times smaller vertical tail then regular DLG plane which makes huge difference in stability of the frame on launch.
Otherwords,instead of going straight after leaving Your hand,plane spins horizontally .
....but it brings more spice to whole flying event
Still wanna try
Yuri
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Old Oct 06, 2012, 11:35 AM
Registered User
Canada, NS, Lunenburg
Joined Oct 1999
3,866 Posts
I think it's worth a try. You need a lefty to do it for you, like me!
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Old Oct 06, 2012, 05:31 PM
Registered User
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Canada, SK, Prince Albert
Joined Jan 2006
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MUST HAVE VIDEO...or don't do it...we all need to see the carnage

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Old Oct 06, 2012, 05:40 PM
Drinks Day Old Expired Milk
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United States, OR, Portland
Joined Aug 2010
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I see that Bath Salts have made there way to Aussie Ville
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Old Oct 06, 2012, 06:13 PM
I am actually really slow
SlowBarless's Avatar
Brisbane
Joined Jun 2008
961 Posts
Maybe I can get it to do several pirouette's in the air before flying away gracefully

Real reason im asking is im looking into more efficient launching techniques, and a discus launch is by far the most powerful type of hand launch.

Lets just say, im working on my own F5D airframe, if I take discus launching into account during the design process DO you guys think it would be possible to work.

You wont be callin me crazy when I have a few seconds up on ya every race
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Old Oct 06, 2012, 07:05 PM
Cumulus Altimus
FASTBEN's Avatar
KELLER TEXAS
Joined Feb 2002
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Quote:
Originally Posted by DaveSawers View Post
I think it's worth a try. You need a lefty to do it for you, like me!
lol
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Old Oct 07, 2012, 10:38 AM
Tim Lampe; Hobbico R&D
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Champaign, IL
Joined Dec 2009
3,761 Posts
I have experience with only one F5D airframe - my Viper. First I flew it on 4S, now on 5S. A baby could launch the Viper. It flies right out of your hand. You don't even need to throw it. Unless the Viper is some kind of mysterious exception and all other F5D ships launch poorly, I don't understand why you would need to get creative on the launch and invent a new technique.

Tim
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Old Oct 07, 2012, 10:41 AM
"The Judge"
sebbe's Avatar
Sweden
Joined Feb 2006
5,792 Posts
Quote:
Originally Posted by KRProton View Post
I have experience with only one F5D airframe - my Viper. First I flew it on 4S, not on 5S. A baby could launch the Viper. It flies right out of your hand. You don't even need to throw it. Unless the Viper is some kind of mysterious exception and all other F5D ships launch poorly, I don't understand why you would need to get creative on the launch and invent a new technique.

Tim
Maybee he means those bigger props ?
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Old Oct 07, 2012, 05:02 PM
Chillaxin dude!
BulletMaster's Avatar
Newcastle, NSW, Australia
Joined Apr 2003
4,797 Posts
faster off launch = less heat time...

Launch is the slowest part of a race.. if you can shave 1 or 2 seconds off (from standstill to race speed), then it is worth it. You would need to modify the vertical stab, ever tried discus launching a glider with no vertical stab below the boom? The model rolls over.. It possibly could work, but then the added drag from the larger vertical stab might negate the launch advantage by slower course speed.

Just my opinion... I'm certainly no expert.
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