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Old Jan 13, 2013, 11:49 AM
Purples a fruit
punkrockd's Avatar
Walnut Creek
Joined Aug 2006
1,279 Posts
I recently jumped back into flying again. Still have the IYF you built. Still never finished it. Needs elevons and minimal work. What was the cg?

Couple friends decided to buy planes and fly them with out ever doing so. I pulled out my old wldwing I bashed super super light and tail heavy. Adam knows how I like em'. Low and behold they both can fly that pig. I don't have much as well. Some foam, micro servos bunch of 72mhz rxs and my eclipse. Bought a Spektrum.

Where did you buy the nylon tube stick mounts? I can't find them. I'd like a bunch. I'm scratch building a delta right now.
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Old Jan 14, 2013, 08:42 PM
UH60 Pilot
E1Allen's Avatar
United States, KY, Fort Campbell
Joined Jan 2010
273 Posts
Hey guys, I got a couple quick questions I hope to get answered instead of digging through 822 pages I've got a 61" Deep Reaper XL from Crashtesthobby setup for FPV that I have currently fitted with the following setup. It weighs 6.5lbs or 2.95kg

2 - 8000mah 3s 30-40c batteries in parallel. I know 16,000mah on the wing...

Hobbyking 3536-1800kv motor Supposed 700w on 3s

APC 9x6 Prop

80a esc


What I would like to do is run the batteries in series instead of parallel to get 6s power.

It seems like a lot more people over here are running 6s and higher setups on their Ritewings. I would guess my wing right now will fly 80-90mph and what I am looking for on 6s is 120-130mph if that is possible?

I was reading some of the posts where you guys were trying to go crazy fast but I think my wing is heavy enough I still need some low end power as well as some high end speed. Anyone have a setup anywhere around this area they could throw out their equipment?

Eric
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Old Jan 14, 2013, 10:30 PM
Victim of C.D.O.
murdnunoc's Avatar
United States, TX, Lubbock
Joined Oct 2007
4,057 Posts
Allen, is your motor getting warm/hot on the 3S and 9x6 prop you're running now?
Also, if you have any measurement of your amps and watts, that will help too.
Do you fly at full power for long, long flights?

Any measurement on amps and watts?
What size ESC are you running now?

6S is pretty high on the RPM side for that big 61" wing.
6S will put the motor/prop at over 30K RPM. That's great on a 40" plane and 6" prop, but the larger plane needs a 7" prop or larger. And to turn a 7" prop over 30K takes some serious power not available from your motor.

EDIT:
Looking at it again, that 3536 outrunner may just be able to run a 7x5 on 6S for around 2000W.
It won't be a top speed 7" prop, but may make a good sport flyer.

3S and 1800kv puts you around 16K RPM. You may be able to still get some good speed on the 3S setup with just a prop change.

An 8x8 prop should pull close to the same power as your 9x6. It'll get higher top speed but sacrifice climbing and make launch tougher. So if you're on the edge with launch now, it may make it too risky. But if launches are a breeze now, the decreased static thrust of the 8x8 may still be fine.

If you fly long flights now on the 9x6, you may be able to run a 9x9 prop with shorter flights to get more power and speed, but not overwork the motor and batteries.

I bet there's some more speed in that plane nearly the way it sets!
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Last edited by murdnunoc; Jan 15, 2013 at 09:12 PM. Reason: reconsidered prop options
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Old Jan 15, 2013, 06:05 AM
UH60 Pilot
E1Allen's Avatar
United States, KY, Fort Campbell
Joined Jan 2010
273 Posts
Not sure on the watts or amps, don't have the measuring tools. Motor does get warm, esc, no. I would opt for a larger motor on 6s.

thanks for the response
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Old Jan 15, 2013, 01:07 PM
Registered User
United States, CA, Thousand Oaks
Joined Oct 2009
53 Posts
Quote:
Originally Posted by E1Allen View Post
Hey guys, I got a couple quick questions I hope to get answered instead of digging through 822 pages I've got a 61" Deep Reaper XL from Crashtesthobby setup for FPV that I have currently fitted with the following setup. It weighs 6.5lbs or 2.95kg

2 - 8000mah 3s 30-40c batteries in parallel. I know 16,000mah on the wing...

Hobbyking 3536-1800kv motor Supposed 700w on 3s

APC 9x6 Prop

80a esc


What I would like to do is run the batteries in series instead of parallel to get 6s power.

It seems like a lot more people over here are running 6s and higher setups on their Ritewings. I would guess my wing right now will fly 80-90mph and what I am looking for on 6s is 120-130mph if that is possible?

I was reading some of the posts where you guys were trying to go crazy fast but I think my wing is heavy enough I still need some low end power as well as some high end speed. Anyone have a setup anywhere around this area they could throw out their equipment?

Eric
I think your endeavor is insane, but here you go:
- first picture shows your current setup.
- second picture is 6S on the same motor. Since it is a 1800kv, the only way to make that work and not burn the motor is using a small diameter prop. It'll work. But forget about launching it by hand, though; you'll probably need a rocket-driven catapult or something. Bring a heat sink: the motor will have to dissipate about 350W in heat.
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Old Jan 15, 2013, 02:16 PM
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Canada, BC, Vancouver
Joined Feb 2012
637 Posts
Nice calculator which one is that
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Old Jan 15, 2013, 03:08 PM
UH60 Pilot
E1Allen's Avatar
United States, KY, Fort Campbell
Joined Jan 2010
273 Posts
For running 6s, I was hoping for someone's motor/prop combo since I can't run 6s on my motor.
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Old Jan 15, 2013, 03:32 PM
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United States, CA, Thousand Oaks
Joined Oct 2009
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Quote:
Originally Posted by elliott000 View Post
Nice calculator which one is that
www.drivecalc.de
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Old Jan 15, 2013, 08:06 PM
never mind the boll⁣⁣⁣ocks
brosius85's Avatar
Australia, NSW
Joined Dec 2010
1,256 Posts
use a big mega in runner or scorpion outrunner

CK also has a new outrunner range that would be good for 6s

keep in mind that plane will probably fold at 120mph unless you reinforce it with more sparring and thick lam.
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Old Jan 15, 2013, 08:56 PM
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murdnunoc's Avatar
United States, TX, Lubbock
Joined Oct 2007
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130mph on a 61" wing should take around 1500-2000W on an 8" prop.
Smaller prop than that and you'll likely be very inefficient, making a lot of noise but not doing much with it.

I think an 8x7 prop would be the best target prop to design a power system around, based on the wing's size and target speed.
An 8x7 at 2000W will be turning around 22,000 RPM on a motor that's running pretty efficiently.

So to get 22K on a 6S setup, you'll need a 1200-1250kv motor.

The 500 size outrunners like the Scorpion 3026-1190 can make that kind of power.
So can a good 36mm inrunner like a Mega 22/35/2E at 1215kv.
Either of those motors will run about $125.

I don't know that I'd put 2000W through a Turnigy 500 size outrunner, though, or any of the Hobby-partz type motors.
You could still run those lines, but it would take a larger motor to handle the power to get 130mph.

EDIT:

But then, IF YOU'RE FEELING VERY ADVENTUROUS You could hook up your present 1800kv Hobbyking motor on 6S and a 7x4 APC Sport prop.
It should be safe for your motor on 6S.
It will make a unholy racket.
Static thrust won't be too bad. Hand launching should be OK.
Don't know how fast it'll go. But it'll be a fun experience!
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Last edited by murdnunoc; Jan 15, 2013 at 09:18 PM.
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Old Jan 15, 2013, 09:11 PM
Registered User
Canada, BC, Vancouver
Joined Feb 2012
637 Posts
On the topic of motors and 6s, i have a spare align 600mx that was in my 550, replaced it with kde..... Its 1120 kv and has an assload of tourqe, little heavy buy the 6s might help balance... Anyone ever seen one on a zeph
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Old Jan 16, 2013, 01:47 PM
UH60 Pilot
E1Allen's Avatar
United States, KY, Fort Campbell
Joined Jan 2010
273 Posts
Quote:
Originally Posted by murdnunoc View Post
130mph on a 61" wing should take around 1500-2000W on an 8" prop.
Smaller prop than that and you'll likely be very inefficient, making a lot of noise but not doing much with it.

I think an 8x7 prop would be the best target prop to design a power system around, based on the wing's size and target speed.
An 8x7 at 2000W will be turning around 22,000 RPM on a motor that's running pretty efficiently.

So to get 22K on a 6S setup, you'll need a 1200-1250kv motor.

The 500 size outrunners like the Scorpion 3026-1190 can make that kind of power.
So can a good 36mm inrunner like a Mega 22/35/2E at 1215kv.
Either of those motors will run about $125.

I don't know that I'd put 2000W through a Turnigy 500 size outrunner, though, or any of the Hobby-partz type motors.
You could still run those lines, but it would take a larger motor to handle the power to get 130mph.

EDIT:

But then, IF YOU'RE FEELING VERY ADVENTUROUS You could hook up your present 1800kv Hobbyking motor on 6S and a 7x4 APC Sport prop.
It should be safe for your motor on 6S.
It will make a unholy racket.
Static thrust won't be too bad. Hand launching should be OK.
Don't know how fast it'll go. But it'll be a fun experience!
Sweet, thanks for the response
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Old Feb 01, 2013, 10:03 AM
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Vtrockin's Avatar
United States, VT, Burlington
Joined Jan 2012
70 Posts
Alright, I finally got back to finishing/sanding and prepping my TL50 for paint, but I'm concerned about the weight.

Specs are 2s 2650 x2 (4S)
Mega 16/15/4 on 6x4


28oz (tl50 so far)
4oz (engine)
3oz (control surface)
35oz (batteries)
================
=60oz (no paint or laminate weight included)

It's fully glassed, but that seems HEAVY compared to previous TL50 builds I've read about. Is it because I glassed it?

Should I have any concerns about hand launching or fly-ability?

http://www.rcgroups.com/forums/showt...highlight=tl50
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Last edited by Vtrockin; Feb 01, 2013 at 10:23 AM.
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Old Feb 03, 2013, 11:26 AM
Fly me to the moon...
Atom1025's Avatar
Sacramento
Joined Jun 2005
4,140 Posts
They fly fantastic when heavy. You may lose a little top end when going up but its gonna carve like a dream.

Launching may be a problem if your not athletically inclined. However I've seen 70oz twin tl50 do a vertical take off. So full throttle hard toss and lay off the elevator till its moving and you'll be fine.
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Old Feb 03, 2013, 11:32 AM
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Vtrockin's Avatar
United States, VT, Burlington
Joined Jan 2012
70 Posts
Perfect - reassuring words :-). Thnx


Quote:
Originally Posted by Atom1025 View Post
They fly fantastic when heavy. You may lose a little top end when going up but its gonna carve like a dream.

Launching may be a problem if your not athletically inclined. However I've seen 70oz twin tl50 do a vertical take off. So full throttle hard toss and lay off the elevator till its moving and you'll be fine.
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