Wattflyer RC Network: RC Universe :: RCU Magazine :: RCU Forums :: RCU Classifieds :: RCU User Reviews :: RCU YouTube
Home Who's Online Calendar Today's Posts RealTime Post Spy Mark Forums Read
Go Back   WattFlyer RC Electric Flight Forums - Discuss radio control eflight > Electric R/C Airplanes > Beginners
Register Members List Wattflyer Extras Articles Search Today's Posts Mark Forums Read Social Groups

Beginners New to e-power flying? Get the low down in here from experienced e-power RC pilots!

Thank you for your support (hide ads)
Reply
 
Thread Tools Display Modes
Old 12-15-2013, 06:31 PM   #1
staticdave
New Member
 
Join Date: Dec 2013
Location: stirling
Posts: 3
Thanked 0 Times in 0 Posts
Club: none yet
iTrader: (0)
Friends: (0)
Default new to rc electric

Hi a ive been away from the hobby 10 years now. I use to fly ic back in the day. But now coming back to the hobby electric power seems to be the way foward. Am looking at getting the eflight dch beaver as my first plane.

My concern is about how togo about charging batteries on site were there is no mains..

Thanks dave
staticdave is offline  
  Reply With Quote
Old 12-15-2013, 06:37 PM   #2
JetPlaneFlyer
Super Contributor
 
Join Date: Mar 2009
Location: Aberdeen, Scotland
Posts: 3,995
Thanked 455 Times in 423 Posts
Awards Showcase

5kW  Outstanding Contributor Award  1kW 
iTrader: (0)
Friends: (7)
Default

Personally I get around that issue by buying enough batteries to keep me going for as long as I need. I just charge them at home before going flying.

You can charge off your car battery if only using small flight batteries, but do it with care if you want to avoid walking home. If charging larger batteries then you need a large deep cycle lead acid battery or even a generator for the really big stuff.
JetPlaneFlyer is online now  
  Reply With Quote
Old 12-15-2013, 07:18 PM   #3
hayofstacks
Super Contributor
 
hayofstacks's Avatar
 
Join Date: Jan 2012
Location: Utah
Posts: 1,470
Thanked 109 Times in 108 Posts
iTrader: (0)
Friends: (4)
Default

in my opinion, the recommended power system will be marginal with that setup. I run a monster 32 on 3 cells with a 12" prop on my ultra stick that weighs up to 2.5lbs less then that beaver. its pretty asthmatic at 350 watts (100 watts a pound). with 4 cells on the same prop, it pulls over 800 watts.

to get 100 watts a pound, you would need between 450 and 600 watts for marginal performance, which would about max out the power 32 motor. e-flight motors are under rated and of good quality, so you can push them a bit past max.

in y opinion you'll be looking at 5-6 minute flight times. if your really careful, maybe 15 absolute maximum. batteries in that size are a bit expensive and take a while to charge.

if your just getting back into the hobby, id recommend going with a park flyer setup, and a 450-480 sized motor. this setup should run between a 1500-2200 mah battery, and batteries of this size cost $5-10 a piece through hobby king vs $25-30 for a larger 3300 mah battery like this plane uses. later down the road, you can y these smaller batteries together and re use them for larger models.


included. brand new the plane is $120

slow stock prop reversal. it flies! easily! 543 watt dual motor bipe slow stick. push-me-pull-you. 242 watt 3 channel slow stick. 365 watt mini ultra stick. 415 watt mini contender. 810 watt ultra stick .25e. 220 watt alpha 450 sport (retired).
hayofstacks is offline  
  Reply With Quote
Old 12-15-2013, 07:40 PM   #4
JetPlaneFlyer
Super Contributor
 
Join Date: Mar 2009
Location: Aberdeen, Scotland
Posts: 3,995
Thanked 455 Times in 423 Posts
Awards Showcase

5kW  Outstanding Contributor Award  1kW 
iTrader: (0)
Friends: (7)
Default

The Beaver in the efite video seems to fly very nicely, presumably that's running the stock efite set up. There are several videos of them on youtube and they seem to go nice on the stock set up too.
Sure it aint no rocket ship, but hey, it's a DHC Beaver not an F-16!

If you were an experienced flyer 'back in the day' then it should come back to you pretty quick, it's like riding a bike.
JetPlaneFlyer is online now  
  Reply With Quote
Old 12-15-2013, 08:39 PM   #5
staticdave
New Member
 
Join Date: Dec 2013
Location: stirling
Posts: 3
Thanked 0 Times in 0 Posts
Club: none yet
iTrader: (0)
Friends: (0)
Default

Yeh. Not looking for a rocket ship yet. I was upto bronze standard bk then. So an easy flier to start of with..

Its mainly scale planes am interested in not really into the small park fly models.
staticdave is offline  
  Reply With Quote
Old 12-16-2013, 12:02 AM   #6
hayofstacks
Super Contributor
 
hayofstacks's Avatar
 
Join Date: Jan 2012
Location: Utah
Posts: 1,470
Thanked 109 Times in 108 Posts
iTrader: (0)
Friends: (4)
Default

I was mainly trying to think about it in a cost effectiveness area. could get a decent ready to fly setup for around $200 if you still had an old radio.

scale planes also fly like crap compared to a similar sized regular rc plane. for instance, the ultra stick is close to the same size, but weighs 1.6-2.5 lbs less with the same power system and battery, giving you more performance, flight times, and.easier to repair. I suggested the mini ultra stick.because I get 20 mins a battery and it flies just as good as the ultra stick(actually better, and I own and fly both) and on a $10 battery.

but I do understand that some of us like different styles of planes, and I simply have no interest or draw to some types of planes.

as far as charging batteries, i personally have a b6 that I love, but batteries charged at 1c balanced take 1-1.5 hours each. to fly more then a couple of flights, your looking at 3-5 batteries if you want that many flights.

slow stock prop reversal. it flies! easily! 543 watt dual motor bipe slow stick. push-me-pull-you. 242 watt 3 channel slow stick. 365 watt mini ultra stick. 415 watt mini contender. 810 watt ultra stick .25e. 220 watt alpha 450 sport (retired).
hayofstacks is offline  
  Reply With Quote
Old 12-16-2013, 01:20 AM   #7
kyleservicetech
Dennis V
 
kyleservicetech's Avatar
 
Join Date: Apr 2008
Location: Wisconsin, USA
Posts: 7,381
Thanked 654 Times in 637 Posts
Club: www.racinercclub.com (I'm the newsletter editor)
Awards Showcase

Outstanding Contributor Award  3kW  2kW  100mph Speed Demon 
iTrader: (1)
Friends: (18)
Default

Originally Posted by staticdave View Post
Hi a ive been away from the hobby 10 years now. I use to fly ic back in the day. But now coming back to the hobby electric power seems to be the way foward. Am looking at getting the eflight dch beaver as my first plane.

My concern is about how togo about charging batteries on site were there is no mains..

Thanks dave
Here is a whole bunch of threads for models of this size.

For the most part, you'd want a minimum of about 100 watts per pound of airplane, so that would require about a 600 watt motor up front. Running 600 watts off of a three cell LiPo would be pulling about 60 Amps out of your battery. That's a bit steep for a smaller sized LiPo. I'd be inclined to go to a 4S or a 5S LiPo battery for this size model.

What will help you in your power selection is one of those computer programs. The one I use is www.motocalc.com, which allows you to input your models wingspan, wing area, type of model airplane (Fast, real fast, streamlined, boat anchor), a variety of motors, props and battery packs. The motocalc program will spit out how the model will fly, rate of climb, stalling speed, and a whole bunch of other stuff. The program is free for 30 days, then $39.

I've been using the $$$$ Hacker motors now for 6 years. They work very well. There is also a lot of other motors available in this power range. Some are very good, some are not worth the shipping cost to get them to your house. Even at that, most of the bottom of the line brushless motors are still a lot better than the brush type motors I, along with many other modelers used 15 years ago.

Field charging is always an issue. Buying a pile of LiPo batteries gets expensive in this battery size. Best to pick up a few good batteries, and field charge them in rotation. For that, you'll need a deep cycle battery, along with a quality LiPo charger.

I use those A123 cells. These type cells are heavier, larger, and have lower voltage output than the LiPos. On the other hand, they can be repeatedly recharged in 15 minutes, can be stored at full charge, half charge, don't matter. I'm charging mine at 10 Amps per cell with a Cellpro Powerlab 8 charger. My various 6S2P A123 battery packs are being charged at 20 Amps. Plus, these batteries have absolutely zero fire hazard.

You have to build your own battery pack to save $$$ over commercial units. Individual cells run $12 each. And, they'll pretty much last the life of your model.

Thread on 70 size glow engine conversion to electric
http://www.wattflyer.com/forums/showthread.php?t=45222

Hacker 6S2P A123 powered Models
http://www.wattflyer.com/forums/showthread.php?t=44686

Hangar 9 Kantana Model
http://www.wattflyer.com/forums/showthread.php?t=68844

Hanger 9 Twist 40 Model
http://www.wattflyer.com/forums/showthread.php?t=70548

AEAJR's Site on Electric Power
http://www.wattflyer.com/forums/showthread.php?t=18521

BEC Linear Current Rating
http://www.wattflyer.com/forums/showthread.php?t=63779

DennyV
Retired and the days are just too short, busier than ever!
kyleservicetech is offline  
  Reply With Quote
Old 12-16-2013, 06:12 AM   #8
mclarkson
Super Contributor
 
mclarkson's Avatar
 
Join Date: May 2010
Location: Wichita, KS
Posts: 2,638
View mclarkson's Gallery4
Thanked 162 Times in 160 Posts
Awards Showcase

Scratchbuilders Award  Outstanding Contributor Award 
iTrader: (0)
Friends: (7)
Default

As Jetplaneflyer said, I mainly buy multiple batteries. But I rarely fly more than an hour or so. If I was at the field all day long, I'd want to be able to charge.

In the field, I charge from my car battery, but most of my batteries are 800 - 1300mAh 3-cells.

mclarkson is offline  
  Reply With Quote
Old 12-16-2013, 06:19 AM   #9
kyleservicetech
Dennis V
 
kyleservicetech's Avatar
 
Join Date: Apr 2008
Location: Wisconsin, USA
Posts: 7,381
Thanked 654 Times in 637 Posts
Club: www.racinercclub.com (I'm the newsletter editor)
Awards Showcase

Outstanding Contributor Award  3kW  2kW  100mph Speed Demon 
iTrader: (1)
Friends: (18)
Default

Originally Posted by mclarkson View Post
As Jetplaneflyer said, I mainly buy multiple batteries. But I rarely fly more than an hour or so. If I was at the field all day long, I'd want to be able to charge.

In the field, I charge from my car battery, but most of my batteries are 800 - 1300mAh 3-cells.

IMHO, working with batteries of this size wouldn't be a problem with your car battery as a power source. Charging a 3S 1.3 Amp Hour LiPo would be pulling about an amp and a half out of your car battery, about what your radio might pull.

Going to the larger 6S 5000 Mah batteries though, and you might have to take along a spare battery to start your car after you kill its battery!

DennyV
Retired and the days are just too short, busier than ever!
kyleservicetech is offline  
  Reply With Quote
Reply

  WattFlyer RC Electric Flight Forums - Discuss radio control eflight > Electric R/C Airplanes > Beginners

« Previous Thread | Next Thread »

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Everything You Wanted To Know About Electric Powered Flight AEAJR General Electric Discussions 268 Yesterday 04:31 AM
Everything You Wanted To Know About Electric Powered Flight AEAJR Beginners 148 04-09-2014 11:31 PM
Long Island Foam Flyers - new electric RC airplane club in Suffolk & Nassau County NY liff New York 10 09-01-2013 04:28 AM
Getting back into RC. Electric ARF recommendations? C_Watkins General Electric Discussions 24 07-11-2011 02:46 AM
12 Texoma RC Electric Extravaganza May 7 jed1d Events, Shows and Fun Fly's - Electric Airplanes 0 04-22-2011 11:44 PM


All times are GMT +1. The time now is 07:30 PM.


Powered by: vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2005 WattfFlyer.com
RCU Eflight HQ

Charities we support Select: Yorkie Rescue  ::  Crohn's & Colitis Foundation



Page generated in 0.20609 seconds with 35 queries