RE: Carbon-Z Yak batteries
You can do either one , and it is important that no one cell gets over or undercharged.
Posted on: 5/15/2013 2:10 PM by Author "guver" in the forum "3D Electric Flying!"
http://www.rcuniverse.com/forum/fb.asp?m=11512504

RE: Carbon-Z Yak batteries
Many of us are exceeding the manufacturer's max rates on many lipos. I am not familiar with your specific batts , but many of mine are charged at 5-15 times the max rate listed on the pack. Each pack should be evaluated to see it's own specific max rate. There are a few different schools of thought on how to determine the max rate , but many are very reluctant to mention it because of liability. Unlike when using and/or discharging packs there is somewhat of a "safety net" when charging (the cv routine of most all lipo chargers)
Posted on: 5/15/2013 5:00 AM by Author "guver" in the forum "3D Electric Flying!"
http://www.rcuniverse.com/forum/fb.asp?m=11512048

RE: Educate me on charging Lipos
Many are now being sold with a 2,3,5,8,10,12 C charge recommended Max.
Posted on: 9/18/2012 2:28 PM by Author "guver" in the forum "Electric General Discussion"
http://www.rcuniverse.com/forum/fb.asp?m=11232733

RE: why are the motors SO far forward?
Thanks guys. I'll not worry any about it. I'll just continue to put my CG where I want it (never adding wight)
Posted on: 9/18/2012 2:18 PM by Author "guver" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=11232724

RE: why are the motors SO far forward?
It's that simple then? For my particular electro-stik I am getting a slightly lighter motor and will be forced to mount it the same far forward position because I will be able to move the battery a bit forward. Thanks for your response. It is simpler than I expected. Leadershobby has WAY too many motors to choose form. [:D]
Posted on: 9/17/2012 2:40 PM by Author "guver" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=11231483

RE: Abused LiPos
I charge on demand and almost NEVER charge or discharge to a storage value. Theoretically this is what I shoot for: packs I use regularly. Pack sets at 3.7 volts/cell until I decide to use it. Charge as fast as possible and use it immediately.
Posted on: 9/17/2012 2:32 PM by Author "guver" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11231473

RE: squealing BL motor when snapping throttle
Update on the electro-stik RXR. I find out that the factory is aware of a timing issue with the supplied motor and esc. The esc is fixed timing at 20 deg. I'm not completely convinced it is "just a timing" issue , but I also haven't re done the connections either yet. It may be cheaper to just replace the esc or the motor. ESC is pretty cheap , but so are motors too. The motor to me is PLENTY big. It is always very cool when finished flying , but I don;t push it because this plane is plenty big and fast for me right now.
Posted on: 9/17/2012 2:07 PM by Author "guver" in the forum "Brushed/Brushless motors, speed controls, gear drives"
http://www.rcuniverse.com/forum/fb.asp?m=11231438

why are the motors SO far forward?
It has always intrigued me why motors/props were so far forward on many of my planes. Engines for that matter too. I realise that we need to get a good CG balance , but many of mine seem to really be hanging further forward than they need to. I've not had much experience moving them , maybe only moving props a few mm forward or backward. Although one mount I installed on a nexstar mini-ep wound up being way further forward than stock. It crashed. What started this was my e-stik may need a new motor and I like using lightest stuff available. Well it is one that actually hangs the motor out front with nothing else there. Given that I want to keep the same CG and motor weight I could conceivably mount the motor BEHIND the mount (instead of ahead of it) thus moving the prop back a few inches. I could then move the battery forward to keep same CG. I guess being a car/truck nut convinces me that all weight should be concentrated in the lowest center of vehicle for a good polar moment of inertia and handling. Is it not the same with planes? (other than ability to be in many various orientations) Is there a significance to having the prop far away from LE of wing? I do have a couple of props behind the wing planes. I notice that many of my planes have the battery exactly on the CG , yet some of them are very much forward of that point. Let's say I needed to install a heavier motor instead of a lighter one. Would I then be ok to move it far back? AND the prop? Hope you kinda get what I'm asking and why. It doesn;t have to be very scientific.
Posted on: 9/17/2012 2:02 PM by Author "guver" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=11231434

RE: Turnigy 9x programming
Could you tell us what esc and plane you have exactly? I think it is the problem. Please also check the "display" on the 9x while working the throttle.
Posted on: 9/16/2012 5:00 PM by Author "guver" in the forum "RC Radios, Transmitters, Receivers, Servos, gyros"
http://www.rcuniverse.com/forum/fb.asp?m=11230289

RE: offer
I'm not sure about all of that. I make very few offers , but if I remember correctly Do we get an e-mail that contains the text that you typed? I can't remember the last offer I made.
Posted on: 9/12/2012 8:04 PM by Author "guver" in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=11226813

RE: PZ Corsair - Hot Battery after Motor Upgrade
Well, the only thing you are "doing wrong" is overtaxxing the battery probably due to a slightly higher kv and thus higher rpm and thus current. If the motor and esc are ok then perhaps just a battery change will make it "fly" I'd sure like to see you try a new haiyin pack http://www.haiyinstore.com/products_mwh.asp?p_id=173&PID=174+&PID=175+&PID=176+&PID=177+&PID=178+&PID=232+&PID=179+&PID=180+&PID=181+&PID=182+&PID=183+&PID=184+&PID=185+&PID=186+&PID=187+&PID=231+&PID=189+&PID=127+&PID=190+&PID=191+#
Posted on: 9/12/2012 6:57 PM by Author "guver" in the forum "Electric General Discussion"
http://www.rcuniverse.com/forum/fb.asp?m=11226751

RE: offer
You are really supposed to ask all questions first , then make an official offer. Go to "my market" home and then "my offers" tab.
Posted on: 9/12/2012 6:37 PM by Author "guver" in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=11226731

RE: Using flyzone Cessna batteries in Super cub
If it's the 48" model (scale select) then yes. It fits and is fine to use. I been using an even bigger one the 3sx2100 in mine. I did remove all the front weight and have the batt pushed all way forward.
Posted on: 9/12/2012 6:35 PM by Author "guver" in the forum "Electric General Discussion"
http://www.rcuniverse.com/forum/fb.asp?m=11226727

RE: Returning to the hobby, want electric to hand launch
Flyzone Sensei
Posted on: 9/12/2012 11:19 AM by Author "guver" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11226300

RE: Can't get to the Buy and Sell Ads
Work ok for me. http://www.rcuniverse.com/market/category.cfm?powertype=3&catID=1 What does it do (or not do) for you?
Posted on: 9/12/2012 9:51 AM by Author "guver" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=11226201

RE: Multiple Pack LiPos
The end result should be the same. Single pack is simpler, less connections. May be cheaper. Double pack is more versatile for placement and balance and can also be used in other seperate apps. May be even cheaper and/or cheaper to replace (just one)
Posted on: 9/12/2012 6:32 AM by Author "guver" in the forum "E-Flight Power Sources"
http://www.rcuniverse.com/forum/fb.asp?m=11226006

RE: A beginner's plan, need suggestion
I think you'd have better luck with this plane than the yak54. It will be much easier. I started with the flylite and never crashed it till 100th flight. http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXZYT6&P=7
Posted on: 9/12/2012 6:21 AM by Author "guver" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=11225992

RE: Hobbyking experience a positive
Nice to hear it. Mark down about 3-4 + experiences for me and HK.
Posted on: 9/11/2012 12:25 PM by Author "guver" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=11225261

RE: Running lipo batteries in series
Yes. http://www.rcuniverse.com/forum/m_9218203/anchors_9218203/mpage_1/key_/anchor/tm.htm#9218203 http://www.scriptasylum.com/rc_speed/wiring.html
Posted on: 9/11/2012 8:08 AM by Author "guver" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11224999

RE: 1st time airborne with my HZ Super Cub
Nice job Bill. Congrats. Now try to wipe that grin off your face and give it another toss up in the air tomorrow if calm. ps. All my Cubs seem to nose over when landing in my back grass. My biggest is a foam 4 ft wingspan and after putting bigger wheels and removing the pants if I do it right it will land ok , but won't take off at all.
Posted on: 9/10/2012 4:58 PM by Author "guver" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11224290

RE: Running lipo batteries in series
[quote]ORIGINAL: Robert1977 Doesn't the cell count determine the volts? I was under the impression that a 2 cell lipo is a 7.4V and a 3 cell is a 11.1.  I am fairly new to this, so I am still learning. The plane I have is actually a Goldberg Eagle 63. It looks almost identical to the Nexstar which I almost bought till I found this kit on craigslist NIB. Pretty proud of the build, just haven't flown it yet. [/quote] Yes, it does. You are correct. The voltage is something that doesn't have to be equal when series running packs. We can series a 7.4 , a 3.7 , a 11.1 and a pair of 14.8 packs all at the same time as long as they use the same capacity cells. They do however have to be in the same state of charge. The nominal voltage of the pack (number of series cells) does need to be the same for doing parallel packs.
Posted on: 9/10/2012 1:06 PM by Author "guver" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11224026

RE: Running lipo batteries in series
Well, they just have to have identical cells. You can series a 7.4 with a 11.1 just fine. You might have the plane I've been eyeing up. The nexstar EP. [;)]
Posted on: 9/10/2012 11:24 AM by Author "guver" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11223916

RE: Running lipo batteries in series
Welcome to RCU. The only rule for series packs is that they have identical capacity. Secondary rules are that they be same age,brand,"C" rating,ect. They of course have to be identical state of charge.
Posted on: 9/10/2012 8:49 AM by Author "guver" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11223739

RE: What brand do you prefer that is made in china when it comes to lipo?
I buy all mine because they're cheap and I can get away with it.
Posted on: 9/10/2012 8:16 AM by Author "guver" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11223696

RE: Which (chinese) facctories make various brands of ESC ..?
A few that Flyzone sells. The models are made by ST models , but I don't know who makes the esc. They all look similar with a square hole in the shrinkwrap exposing a blue heat sink. One I know has a LVC of 8.77 volts with reduced power to motor and then at 8.72 it cuts power off to motor. Another I know has a fixed LVC below 10 volts and may be actually 8.77 volt. They seem to have very long servo plug AND a blue round (resistor)? at the battery end. Super Cub 18 amp esc http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXCLBE&P=7 FW-190 was originally listed as a 40 amp http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXCKZC&P=7 Cessna Corvalis 350 a 30 amp esc http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXCLAR&P=7 Sensei looks identical and is a 30 amp esc http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXCKZB&P=7 Acro-Wot (my next plane) 40 amp http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXCMZW&P=7 I'll see if it's identical plane may be made or sold by RipMax also. I use a lot of these esc and they all are armed as soon as they are plugged in. They are simple and work well. I've only had one go bad during a prop strike. I appreciate the help and research you've done.
Posted on: 9/10/2012 7:49 AM by Author "guver" in the forum "Brushed/Brushless motors, speed controls, gear drives"
http://www.rcuniverse.com/forum/fb.asp?m=11222927

RE: Which (chinese) facctories make various brands of ESC ..?
I hope you didn't mind me responding in your thread (cluttering it up) http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXAZTV&P=7 GP super sportster 18 amp http://pics.towerhobbies.com/imagel/h/lhcaa3994.jpg Skyfly Max 25 amp http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXCLCV&P=Z Millenium Master 30 amp I'm pretty sure these 3 look like Aeolian or XQ http://www.xqcontrol.com/en_Product2.asp , right?
Posted on: 9/8/2012 6:52 PM by Author "guver" in the forum "Brushed/Brushless motors, speed controls, gear drives"
http://www.rcuniverse.com/forum/fb.asp?m=11222272

RE: Which (chinese) facctories make various brands of ESC ..?
[quote]ORIGINAL: DrMotor Electrifly Silver Series Brushless ESC's,  8A to 45A Which company might make these Electrifly ESC's, is an interesting question:   I have discovered it is:  INGS Bee's Electronics - <a href=''http://www.ings-cn.com/ESC/esc.htm''>http://www.ings-cn.com/ESC/esc.htm Main points: 1. The Electrifly ESC's look different from any other ESC's  -they have (what appears to be) 2 different length capacitors on the battery input side   -most ESCs have 2 identical capacitors on this side   <a href=''http://www.electrifly.com/escs/silverseries.html''>http://www.electrifly.com/escs/silverseries.html 2.  Electrifly ESC's are identical in configuration with Super Tigre ESC's (see pics) - <a href=''http://www.supertigre.com/electric-power/speed-controls.html''>http://www.supertigre.com/electric-power/speed-controls.html   The Super Tigre ESC's are available in 20A and 30A rating,  whereas Electrifly Silver Series ESC's are available  in 8, 12, 25, 35, 45A rating.  Nevertheless, Super Tigre ESC's are clearly identical in format, and obviously come from the same factory as these Electrifly ESC's. 3.  A targeted search showed that these ESC's are made by INGS Bee's Electronics, in China - <a href=''http://www.ings-cn.com/ESC/esc.htm''>http://www.ings-cn.com/ESC/esc.htm   The configuration of the Bee ESC's is clearly identical to the Electrifly and Super Tigre ESC's (see pic).  The INGS Bee ESC's are available in 15, 30, 40 and 50A  ratings (and soon 60A, so they say). 4.  The specs of the Bee 30A ESC are identical to the Super Tigre 30A ESC;  and even the parameters are listed in an identical order. The specs of the Bee 40A ESC are identical in almost all respects to the Electrifly 35A ESC. There really cannot be any doubt that  INGS Bee, Electrifly and Super Tigre ESC's  are identical,  and come from the same source. 5.  These ESC's are not really programmable -they are more ''Plug and Play''    <a href=''http://www.rcuniverse.com/magazine/article_display.cfm?article_id=615''>http://www.rcuniverse.com/magazine/article_display.cfm?article_id=615 The only thing which can be altered is brake on / off,  using the Tx.  They have a useful ''safe start'' feature. 6.  There seems to be no other supplier besides Hobbico (of which Great Planes, Tower Hobbies, Electrifly are a part; they distribute Super Tigre) which sell these somewhat unique ESC's. 7.  The larger Electrifly 60A and 80A ESC's  come from a different manufacturer  (see next post). [/quote] Wow, Thank you. I did over 3 hrs of research and found out 1 and 2. You are absolutely correct. I just couldn't find any more info and that link to the manufacturer must've been the only one I hadn't visited. [:)] Too bad I won;t be able to program anything. I know they are cheap ones. I had it narrowed down by wire color and those 2 different sized caps. I have lots of them, they work good and have been reliable for me. What do you think is meant by "set by PC" under the LVC. I do know what 67% is , that's pretty easy.
Posted on: 9/8/2012 6:08 PM by Author "guver" in the forum "Brushed/Brushless motors, speed controls, gear drives"
http://www.rcuniverse.com/forum/fb.asp?m=11222223

RE: Which (chinese) facctories make various brands of ESC ..?
Did I overlook them or would you have any of these info? GP electrifly 8-45 amp? http://www.electrifly.com/escs/silverseries.html Flyzone has a number of different ones and many of the models are made by ST models and sold with various brands. Here's a few of them. http://www3.towerhobbies.com/cgi-bin/wti0097p?CATEGORY=&MANUFACTURER=FLZ&FVSEARCH=ESC+++ They all look different to me. A GP one here I'd like to know. http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXAZTV&P=7 A Hobbico http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXZCP1&P=7 Lots of Hobbico products use supertigre http://www.supertigre.com/electric-power/speed-controls.html I have lots of them and like them. Tactic another in house brand fro Hobbico http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXVZZ1&P=7 I bet you recognise some of these , right? I'd appreciate knowing who makes them or which ones are identical. Maybe they have programming that I'm unaware af too.
Posted on: 9/7/2012 5:48 PM by Author "guver" in the forum "Brushed/Brushless motors, speed controls, gear drives"
http://www.rcuniverse.com/forum/fb.asp?m=11221110

RE: IMAX B6 confusing me, I need to measure amps
I'm not sure what it is you're asking now. I have seen this over and over again , but it is always the same process to figure out what's going on.
Posted on: 9/6/2012 7:59 PM by Author "guver" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11220158

RE: IMAX B6 confusing me, I need to measure amps
I'm sorry if I confused you rather than helped you. The two key voltage readings we need aren't necessarily those two. We need a "resting" voltage at each end (top and bottom) The charger is capable of keeping a track on the capacity added and I have no reason to distrust the 726 mah that it lists. I've seen many inaccurate chargers and most of them have been off the other way due to inaccurate current. They are always perfect for time. They use current and time to get that number as you probably know. I can understand your concern with having an accurate way to measure capacity replaced with a-123 packs. As far as the discharge current goes you were up against your discharge wattage limit even though you set it for 5 amps. How about trying to get a total or static reading on the voltage at rest , and then discharge OR charge to get to the other end. Note the voltages and the capacity listed by the display and then another resting voltage. Balance is very important when running capacity tests. Realistically your pack might be around 1500 or so and your charger is probably very close. You could also verify the time and the current if you have the tools.
Posted on: 9/6/2012 6:13 PM by Author "guver" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11220120