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Old May 21, 2012, 12:37 PM
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JBuck's Avatar
United States, CA, San Diego
Joined Apr 2007
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Ya, I was kinda thinking that airspeed might be to slow to make a difference at launch.

I had a couple rough launches before finally getting it in the air.

Do most of you guys throw it more up versus level?
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Old May 21, 2012, 01:32 PM
Champagne Supernova
FlyHighSelllow's Avatar
United States, FL, Orlando
Joined Jul 2010
2,002 Posts
Quote:
Originally Posted by JBuck View Post
Ya, I was kinda thinking that airspeed might be to slow to make a difference at launch.

I had a couple rough launches before finally getting it in the air.

Do most of you guys throw it more up versus level?
I built a bungee launch for mine. Works great............
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Old May 21, 2012, 01:58 PM
215.0 MPH
markusvt's Avatar
United States, VT, Essex
Joined Jul 2007
1,186 Posts
Put in trim on second flight mode, switch enabled.

Quote:
Originally Posted by JBuck View Post
anyone know how to mix in some right aileron on a switch ? In order to counter torque roll at launch.
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Old May 21, 2012, 02:00 PM
Crash and burn, huh Mav?
Runnikee's Avatar
USA, IN, Fort Wayne
Joined Aug 2010
995 Posts
I'm nowhere near as talented as the vast majority of people flying these things on here and launching vertically has always been easy for me, with zero crashes or hairy launches. Even if it torque rolls, it doesn't matter since it's still going straight up.
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Old May 21, 2012, 03:00 PM
I hate waiting for parts
Mike_Then's Avatar
United States, NC, Garner
Joined Apr 2001
6,873 Posts
My FJU is all done... finished it yesterday but the stupid weather/wind but the kibosh on the maiden flight. Today, however, is quite nice so I'm gonna meet a buddy at our field for the maiden. I'm running:

HET 2W-25
Castle ICE 75
APC 6 x 5.5
3s 4000 mAh 25C

It balances right on the money with that big pack, too. I installed the ESC right behind the wing spar. I waited until the very end to glue the turtledeck and fins, as that made it a lot easier to install and set up everything. The heatsink that came with the motor even fits under the turtledeck, albeit barely.

I forgot to bring my wattmeter but I have that same setup in a 60" flying wing and it pulls around 75A on the ground. It moves that wing around pretty good to, so I imagine that same power setup in that slick airframe should be.... spirited performance. Wish me luck!
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Old May 21, 2012, 03:42 PM
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Denver, CO
Joined Nov 2007
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--I believe I will get the bungee launcher back out and launch it that way, at least initially.
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Old May 21, 2012, 03:47 PM
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Denver, CO
Joined Nov 2007
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--The 2w25 with finned heatsink on 4s 3000 -3300 6x5.5 is a great high performance setup for 130mph+. After a dozen or so flights, you want to go faster.

--It is a good intermediate setup between sub 120mph and 145mph+.
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Old May 21, 2012, 06:34 PM
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feefo's Avatar
Staffs, UK
Joined Apr 2009
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After seeing Mopar's vid, I thought everyone would use the full torque roll launch technique, way cooler than normal straight out launches.
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Old May 21, 2012, 10:47 PM
I hate waiting for parts
Mike_Then's Avatar
United States, NC, Garner
Joined Apr 2001
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I had a successful maiden flight!! Even though the plane feels heavy, it sure doesn't fly like it's heavy. It's fast enough that it gets out of sight rather quickly. The 2nd flight had a failed launch and it threw something out of trim as when I got it in the air, it was climbing quite severely. I landed without issue and will give it a once-over before flying again.

I swear this Elapor feels more dense than other Multiplex planes. It seems tough enough that I probably won't have to coat the bottom with thinned-out epoxy.

The speed is good so far, but it's nice to know I can easily go faster if I choose by simply upping the cell count and switching props.
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Old May 22, 2012, 10:22 AM
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JBuck's Avatar
United States, CA, San Diego
Joined Apr 2007
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Quote:
Originally Posted by feefo View Post
After seeing Mopar's vid, I thought everyone would use the full torque roll launch technique, way cooler than normal straight out launches.
What is the "full torque roll launch"?
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Old May 22, 2012, 10:37 AM
You down with EPP?
johnnyrocco123's Avatar
Houston, Tx
Joined May 2009
6,830 Posts
Quote:
Originally Posted by JBuck View Post
What is the "full torque roll launch"?
When you throw your Funjet in the air and it does a 360 degree roll right out of your hand. Good times.
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Old May 22, 2012, 11:38 AM
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feefo's Avatar
Staffs, UK
Joined Apr 2009
3,603 Posts
Quote:
Originally Posted by JBuck View Post
What is the "full torque roll launch"?
Take a look at the bottom vid
http://www.rcgroups.com/forums/showp...&postcount=855
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Old May 22, 2012, 12:07 PM
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rimripper's Avatar
Alberta,Canada
Joined Nov 2009
2,470 Posts
Quote:
Originally Posted by JBuck View Post
What is the "full torque roll launch"?
For a vertical launch,it's best to have a bit of power....

Throttle up till you feel it lifting out of your hand,lean back....and throw it straight up,as it leaves your hand,the FJU will torque roll,just let it roll until level...and fly away.

I do have a video of a launch taken from friend.

I've never had a failed launch.
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Old May 22, 2012, 12:24 PM
Why the dirt on the wings?
moparmyway's Avatar
New York
Joined Jan 2009
4,997 Posts
Quote:
Originally Posted by feefo View Post
And @ :21 in the top video.
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Old May 22, 2012, 12:29 PM
Why the dirt on the wings?
moparmyway's Avatar
New York
Joined Jan 2009
4,997 Posts
Quote:
Originally Posted by Mike_Then View Post
It seems tough enough that I probably won't have to coat the bottom with thinned-out epoxy.
Mike,
Its WAY better for the epoxy and the foam if you just "paint" on a coat of epoxy and let your heat gun (or hot hair dryer) heat up the epoxy and foam, allowing it to absorb into the foam, creating a very sturdy foam/epoxy matrix thats super tough !!

Thinning out epoxy isnt good, it looses all strength and resiliency, plus you are adding something to thin it out, which alters the physical properties of the epoxy itself, and you could wait weeks for your thinned out epoxy to cure properly (if it can at all).
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