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Old Oct 20, 2008, 09:27 AM
Checking CG is for NERDS!
Smokescreen38's Avatar
Joined Jun 2005
5,347 Posts
Hey, guys... how will the Arc 28-47-2 perform on 3s with a 5x5 prop?

I'm itching to get started on a Funjet...looking for a setup that will run fast on 3s but have room for a major boost by moving up to 4s.

Thanks!!
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Old Oct 20, 2008, 09:56 AM
Crash - Rebuild - Repeat
efether's Avatar
Atlanta, GA
Joined Aug 2007
500 Posts
Quote:
Originally Posted by Smokescreen38
Hey, guys... how will the Arc 28-47-2 perform on 3s with a 5x5 prop?

I'm itching to get started on a Funjet...looking for a setup that will run fast on 3s but have room for a major boost by moving up to 4s.

Thanks!!
That motor...with a 6x5 prop on a 3S will push the Funjet up to about 110 MPH; 127 MPH on 4S, and the 140+ range on 5S. You'll be pulling up to about 60 amps as the size of the pack grows. Just be careful...over 130 MPH, smaller servos (like the HS-55) can't move the control surfaces. Built it with Servos that can do 30+ oz-inch of torque if you're going to push it...and also re-enforce the elevons...the foam bends a that speed too.

Be safe...and have fun

-Eric
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Old Oct 20, 2008, 11:00 AM
Registered User
California
Joined Mar 2008
262 Posts
Quote:
Originally Posted by Aio_1
Where do you fly?
Anything but a very lightweight Funjet doesn't seem like a suitable plane to be flying near houses and roads.
i fly at a local school. really a bas space but i havent crashed a plane in two years. I think i had some interfearance... idk my 3s 2500 blew up into flames. i wish i had a camera to folm the whole thing.
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Old Oct 20, 2008, 12:30 PM
Checking CG is for NERDS!
Smokescreen38's Avatar
Joined Jun 2005
5,347 Posts
Quote:
Originally Posted by efether
That motor...with a 6x5 prop on a 3S will push the Funjet up to about 110 MPH; 127 MPH on 4S, and the 140+ range on 5S. You'll be pulling up to about 60 amps as the size of the pack grows. Just be careful...over 130 MPH, smaller servos (like the HS-55) can't move the control surfaces. Built it with Servos that can do 30+ oz-inch of torque if you're going to push it...and also re-enforce the elevons...the foam bends a that speed too.

Be safe...and have fun

-Eric
Great info!! Thanks, efether.
Good to know that the HS-55s will work above 100...but I think its good advice to just start with stronger ones.
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Old Oct 20, 2008, 02:05 PM
Checking CG is for NERDS!
Smokescreen38's Avatar
Joined Jun 2005
5,347 Posts
I ordered up my Arc 28-47-2 motor!! I hope to get some flights on this thing before the snow flies.

I am hoping that I don't slit my wrist on the fist launch.
It looks dangeous to launch one of these pusher prop planes.
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Old Oct 20, 2008, 03:37 PM
Registered User
gwong's Avatar
Vancouver, B.C., Canada
Joined Sep 2003
935 Posts
Quote:
Originally Posted by Zeta30
I have never had problems with torque rolling with mine. Granted I don't have a real powerful set up, I'm only pulling about 400 watts but torque rolling has never even been close to a problem.
Yes you are right, on closer inspection my port side servo failed in flight. It was working as I always do a preflight check.

I just check them as I was going to put the servos into another plane and the starboard side servo is dead. The servo is a HS65.

Cheers,

Gord.
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Old Oct 20, 2008, 03:49 PM
Pesky Landings!
bigandy's Avatar
Abergele, North Wales, UK
Joined Apr 2004
1,113 Posts
Hi Folks,

I've had a good search through this thread, and so far drawn a blank. I was wondeirng if anyone knew of a scaled up Funjet at all? I'm looking at something a little different as a quick build winter project, and I was thinking that my Funjet flies great, it would be really cool as a x2 scale version (Obviously with a more powerful motor!)

Cheers
Andy
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Old Oct 20, 2008, 06:25 PM
The Kid
Thekid3418's Avatar
Detroit, MI
Joined Dec 2007
2,587 Posts
you could do a twinjet with a single motor. Or better yet a twin jet with TWO motors
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Old Oct 20, 2008, 06:53 PM
LOVE MAIDEN'S : >
neiloneil's Avatar
norfolk va
Joined Aug 2007
1,480 Posts
all hell ..i got that suppo 70A esc as a combo with the motor from lightflight...is this esc crap??...i hate to keep ordering from hong kong every week..doesnt hobby city have a us warehouse?
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Old Oct 20, 2008, 08:26 PM
I buy, I fly, I buy....
Wingwrecker's Avatar
United States, OH, Toledo
Joined Feb 2008
1,969 Posts
Quote:
Originally Posted by bigandy
... it would be really cool as a x2 scale version (Obviously with a more powerful motor!)

Did you say x2 ???

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Old Oct 20, 2008, 08:29 PM
I buy, I fly, I buy....
Wingwrecker's Avatar
United States, OH, Toledo
Joined Feb 2008
1,969 Posts
Quote:
Originally Posted by Smokescreen38
I ordered up my Arc 28-47-2 motor!! I hope to get some flights on this thing before the snow flies.

I am hoping that I don't slit my wrist on the fist launch.
It looks dangeous to launch one of these pusher prop planes.

I'll give you the same advice I've given others, as it works great for me. Learn to launch left-handed so that you can keep your right hand on the elevator during launch. This wont stop your wrist from gushing but it sure helps to keep the plane from skiffing the ground...
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Old Oct 20, 2008, 08:31 PM
LOVE MAIDEN'S : >
neiloneil's Avatar
norfolk va
Joined Aug 2007
1,480 Posts
Quote:
Originally Posted by Wingwrecker
Did you say x2 ???





sweeta!
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Old Oct 20, 2008, 09:32 PM
Ook!
skaffen's Avatar
New Zealand
Joined Aug 2007
1,496 Posts
Hiya. I'm planning a Funjet with an Arc 28-47-2 and a Plush 60A ESC on 4S. Just wondering what's the best C and mAh to balance batt life/weight/power?

I have some 18C 4S 2200mAh batts already, will 18C cope?
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Old Oct 20, 2008, 09:48 PM
LOVE MAIDEN'S : >
neiloneil's Avatar
norfolk va
Joined Aug 2007
1,480 Posts
Quote:
Originally Posted by skaffen
Hiya. I'm planning a Funjet with an Arc 28-47-2 and a Plush 60A ESC on 4S. Just wondering what's the best C and mAh to balance batt life/weight/power?

I have some 18C 4S 2200mAh batts already, will 18C cope?

what size prop are you planning
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Old Oct 20, 2008, 09:52 PM
Fast Foamer
pcliftonjr's Avatar
Phoenix, AZ
Joined Jan 2006
100 Posts
Quote:
Originally Posted by skaffen
Hiya. I'm planning a Funjet with an Arc 28-47-2 and a Plush 60A ESC on 4S. Just wondering what's the best C and mAh to balance batt life/weight/power?

I have some 18C 4S 2200mAh batts already, will 18C cope?
It depends on what prop you use...I'd suggest using at least 20C 2200 packs. Mine runs around 45A WOT with a 6x4 sport prop.

Paul
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