RE: LiPo fire mid-flight
I've had troubles when one cell did not charge properly, but showed close to 4.2V when charged. When flying it pretty quickly got below 3.0V. ESC did not notice (since total pack voltage is still well above 30V), but I felt less performance so I landed. That one cell inflated big time but no fire. Can't imagine otherwise why a pack would fail unless a short developed somehow. Volkert
Posted on: 5/20/2013 10:18 AM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11517241

RE: YGE 90HV F3A
Original YGE-90 is a great controller and for sale. On an expensive plane I also would be hesitant. Although specs and software can be the same you cannot be sure on component sourcing and build quality. I just bought a YEP45 to test. Volkert
Posted on: 5/20/2013 4:50 AM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11516877

RE: YGE 90HV F3A
This looks a lot like a 80HV: http://www.hobbyking.com/hobbyking/store/__28372__Hobbyking_YEP_80A_HV_4_12S_Brushless_Speed_Controller_OPTO_.html Anybody tried it yet? Volkert YGE 90 HV electronic speed controller 90A continuous with good cooling 4 bis 12s LiPos with automatic detection, undervoltage feedback. 12 to 36 cells NiMh Undervoltage feedback disableable. Opto coupler Governor-Mode Soft start Infinitely adjustable F3A brake Active freewheel, for efficient partial load handling Automatic Timing or in 6 setting choices Electronic brake with 3 settings 8-16 kHz Max RPM: 240.000 (2-Pole) Over temp notification Integrated anti-spark Dimensions: 67 x 31 x 19 mm Weight 53g without cables, 79g with Programming with ProgCard II HK spec: Features: • HV capability for use with up to 12S (44.4V) Lipoly • Optional programming card for convenient setup • ESC had separate programming lead built-in so there is no need to unplug from RX • Super fine throttle resolution provides first-rate and highly accurate linearity • Super smooth adjustable start-up mode • Constant RPM mode (governor mode) • Adjustable F3A brake. • 3 steps adjustable normal EMF brake • High anti-interference capability • Low voltage cut-off protection with automatic adjustment for NiCd/NiMH/Li-Ion/LiPo/LiFePO4 • Soft cut-off option at low voltage, slows motor RPM gradual rather than hard cutoff (LVC) • Low voltage cut-off can be disabled • Variable cut-off voltage / cell • Active free-wheeling circuit allows for unlimited "partial load" capability • LED status display • Adjustable motor timing from 0° to 30° • Blocked rotation protection (senses a jammed motor and stops motor rotation) • Motor reversing from ESC (no need to change ESC/motor wires) • Over-temperature protection and overload alarm • Anti sparking circuit: reduces connection sparks • Throttle signal lose protection. If the signal is lost for 3 seconds, the power will automatically cut-off. • Safe power-on. (Motor will not start until throttle is returned to lowest position) ***This ESC is compatible with both helicopter and airplane models.*** Specification: Max Cont Current: 80A Max Burst Current: 100A for 10 seconds Input Voltage: 4-12 cells li-XX or 12-42 Ni-MH/Ni-Cd battery BEC: None (OPTO) PWM: 8~16 KHz Max RPM: 240,000rpm for 2 Poles Brushless Motor PCB Size: 50x30x17mm Weight: 84g (including wires)
Posted on: 5/19/2013 11:53 AM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11516172

RE: Batteries running-in and swollen batteries
[quote]ORIGINAL: serious power [quote]ORIGINAL: wagen017 Don't know, and I also wonder about the statement. Is it really about running in of packs or more of a safety approach where you observe if packs are stable? Volkert [/quote] Hi Volkert, I don't really know much about the internal workings of lipos or what is going on with them when new. I do know that there is something
Posted on: 9/17/2012 3:45 AM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11230806

RE: Batteries running-in and swollen batteries
Don't know, and I also wonder about the statement. Is it really about running in of packs or more of a safety approach where you observe if packs are stable? Volkert
Posted on: 9/17/2012 12:37 AM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11230711

RE: Batteries running-in and swollen batteries
Anybody with long time experience charging at 5 C by now? I have one Thunderpower 4400mAh G6 ProLite 25C pack with 120 cycles which seems to be holding up well until now. Volkert EDIT: this is btw what is found at the TP website on running in new packs: First few Flights Thunder Power recommends no more than 3-5C average discharge for breaking in new packs. Also be extremely careful not to over discharge new packs (Packs should NEVER be over discharged at any time, but over discharging on the first flight will ruin the battery permanently before you are able to enjoy it.
Posted on: 9/16/2012 12:08 PM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11230125

RE: Batteries running-in and swollen batteries
I really wonder about this "running in" story. I think it depends on the failure mode. I recognise at least three different ones: - indivudual cell unbalance versus the rest of the pack. This effect will be greater when reaching maximum discharge (<3V). - increase of internal resistance over time resulting in reduced Max C delivery - reduction of capacity over time Running in packs IMHO has the effect that you take more care the first few runs in charging/discharging which will help in detecting failure mode #1. I have had other packs that i never run in, actually were discharged fullu serveral times to the max and still ran fine upto 300 cycles, only with some reduced total capacity. I've had other packs I really carefully ran in which I retired after 100+ flights due to increased Ir. The link provided gives some great insights in what influences actual pack build quality. That initial quality will have much greater influence that the running in methodology used. Volkert
Posted on: 9/15/2012 11:15 PM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11229748

RE: KMP / YT FW-190 Build Thread
Thanks, good tips! Volkert
Posted on: 9/7/2012 9:49 AM by Author "wagen017" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11220752

RE: YGE 90HV F3A
I dont think the brake settings have any influence on the misfiring. Volkert
Posted on: 9/6/2012 3:40 PM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11219981

RE: KMP / YT FW-190 Build Thread
Hi guys, I am about to finish building my FW-190. I redid it a bit, making it a replica of the famous ace Heinz Bar, who typically flew the red 13 (and not a yellow 11 like this model). Unfortunately I have not been able to figure out how to post pictures from iPad on this forum so I can only provide a link to a small buildthread I am doing on a Dutch forum: http://www.modelbouwforum.nl/forums/vliegende-schaalmodellen/161987-kmp-esm-fw-190-a-6.html She's going to be powered by a Laser twin 200v with 18-8 prop. Retracts are ESM electrics. OK, now a question: for mounting the engine did you just follow instructions (just 6mm below centerline) or did you build in some side/down thrust? Also, on my firewall ESM put a sort of centerline horizontal and vertical. However, they don't seem to be very specific. Volkert
Posted on: 9/5/2012 1:22 PM by Author "wagen017" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11218551

RE: New pattern ship recomendation
So to clarify the rules are that the airplane is less then 5 kg, and the maximum size is 2 meters long, 2 meters wingspan. You can compete today if you want to with your Angel 30, it does not have to be a 2meter ship. Volkert
Posted on: 8/21/2012 2:28 PM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11201262

RE: New pattern ship recomendation
Why would the Sebart Wind 110 not be "legal"? Great replacement in my opinion would be the Mythos. Volkert
Posted on: 8/21/2012 1:47 PM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11201209

RE: YGE 90HV F3A
The YGE90 worked perfectly. I do recognize the issue of misfire after downline. However, i would still recommend this controller. I also find it more efficient then the jeti opto-99. About 5-10%, which is notable. I flew mine with Plettenberg 30-10 and Advance. Volkert
Posted on: 7/26/2012 3:55 AM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11169750

RE: KMP / YT FW-190 Build Thread
Yep, takes some getting used to however once done running high expo helps to manage bigger throws. Volkert
Posted on: 6/12/2012 7:01 AM by Author "wagen017" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11115456

RE: KMP / YT FW-190 Build Thread
How much expo are you guys running? I am now flying pattern and 60% or even more is not uncommon. This normally fixes problems with excessive throws. Volkert
Posted on: 6/11/2012 2:37 PM by Author "wagen017" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11114759

RE: KMP / YT FW-190 Build Thread
Roger, she looks beautiful, good luck on the maiden! Doug, you mention full flaps. What is that, 60 degrees? Volkert
Posted on: 6/5/2012 9:39 PM by Author "wagen017" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11108207

RE: Ordered new batteries . . . we'll see . . .
I've got a new solution. I only fly now with one set of batteries (TP4400 25 C) which I can charge at the field with 5C (we now have solar powered battery station at 24-30VDC) with my iCharger 3010. Thus i charge the set in 8-10 minutes. I now fly a Spark with C50. Power consumption in this combo is really low so I fly 8 minutes using no more then 3000 mAh (so I could fly even longer but by now my mind is so used to flying these 8 minutes I sortof automatically land (-: ). Joe, I still have one of my original Rhinos (one was in a crash and burned out, the other I gave away to a fellow flyer who needed a good pack). This Rhino now has done >>250 flights but refuses to quit! It is still good, balance is fine and Ir good (25mOhm for the pack). Only capacity is reduced to ~4500mAh. They are incredible! Volkert
Posted on: 5/24/2012 12:32 AM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11092669

RE: Spark Eliminator
Same with YGE-90. Spark eliminated, no problem! Volkert
Posted on: 5/8/2012 1:50 PM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11073342

RE: Newbie to Electric Pattern
Ifyou choose to go with hobby city take the Rhino's. Scott's suggestions are very good though. Volkert
Posted on: 3/23/2012 11:06 PM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11012664

RE: Experience of using high LiPo charge rates
[quote]ORIGINAL: klhoard . I use FMA PL8 chargers and charged my HobbyKing Blue ($40) 5S-5000 LiPo's all last year at 10 amps (2C) at the field and 20 amps (4C) at home.  I would have charged at the higher rate at the field, but my poor generator would ''dance'' at the higher rate. . I'm convinced that it is more important for battery longevity to store / keep your batteries at 50% charge rate (3.8V per cell) as much as possible.  Every time you fully charge your LiPo it is the same as winding up a rubber band to its limit.  The longer you make it hold that potential, the more damage you're doing to the cell.  Also, every time you discharge it past 20%, you're doing the same thing.  That's why they come from the factory at 50% charge. . . . I am adamant about finishing the flying day with a storage charge, preferably at the field, but definitely at home.  Then I don't charge them back up until I am either at the field or until I've committed to go to the flying field for the day.  It doesn't take long to bring a battery up to full charge from 50% at 20 amps. . . also my field just got connected to ''the grid'' . . . (yay!!) . [/quote] Amen to that; charge tour batteries not too long before flying and store them at 50%. Another, even better solution is to go flying everyday! :-) unfortunately i have not been able to get to that point yet! Volkert
Posted on: 3/19/2012 10:25 AM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11007010

RE: Experience of using high LiPo charge rates
I have been charging my old&faithful Rhino packs already for a long time at first 1.5C and now 2C. These are the old ones, later makes were 2C charge by the manufacturer, but I don't believe they really changed anything beside the spec. These have run 250 cycles now and are still good. I have also used 3 sets of Xcell lipos which i charged from the start with 1.5C but I never liked them much. I sold them after app. 80 cycles. They were always showing somewhat high (4-6ohm/cell) Ir. I now run one TP 4400 25C which I charge with 11amp (the max I get out of my current power supply/charger combo). Combined with the low power usage I see on the Hacker C50 (2500-2700 per flight) my recharge time is about 20 minutes. Effectively i now only use this one battery with the old Rhino as backup. The TP is doing great and i see no adverse effects of the higher charge rates. Volkert
Posted on: 3/17/2012 10:34 PM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11005002

RE: New Plettenberg F3A motor
You can use the same settings as on a Pletty 30-10evo. Hope this helps! Otherwise check with mdjohnson. Volkert
Posted on: 3/16/2012 11:40 AM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11002774

RE: Contra Rotating Propeller Drive for f3a 2m Pattern Planes
[quote]ORIGINAL: TonyF And what I really like about the Contra is that it has a ''Made in the USA'' stamp on it. How much high tech pattern stuff out there has that on it these days? [/quote] Unfortunately, very little. Of course CA-models has a strong US influence. It is still unfortunate Mike Hester had to throw the towel. The work Brenner is doing is really great! Volkert
Posted on: 3/9/2012 10:45 AM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=10993088

RE: What to do? 2m Patternship
Maybe should be a new thread, good question. Here is mine: 1. Krill Spark Evo 2 2. Nuance 3. CA Visa 4. Sebart Wind S with contradrive 5. Nice Oxai, but which one? Volkert
Posted on: 2/26/2012 11:21 PM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=10977737

RE: What to do? 2m Patternship
the usual suspects I presume..... Volkert
Posted on: 2/26/2012 1:02 PM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=10976902

RE: Plettenberg maintenance?
[quote]ORIGINAL: dando Aussie_Knife_Edge, I may try the heating or freezing method. I don't have a Dremel ;) [/quote] hahaha!!! Dutchie says put it in the freezer, Aussie says heat it! I guess it has been a long winter here and a long summer there!! cheers! volkert
Posted on: 2/26/2012 12:54 PM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=10976886

RE: Plettenberg maintenance?
Interesting. On my 30-10, it just fell off. Can't imagine on the 30-09 it is a different design. You might want to check with Plettenberg if they can send you a spare one. It can't be a very expensive part. It might actually be that if you heat it, the ring will expand more then the bearing, because it is not a very hard metal. So, following that logic you might want to put it in the freezer. Maybe then it comes out easy. Volkert
Posted on: 2/26/2012 12:25 PM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=10976843

RE: Plettenberg maintenance?
You mean the big bearing is stuck in the can? Would not use a torch! Volkert
Posted on: 2/26/2012 8:53 AM by Author "wagen017" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=10976588

RE: Futaba 10CAG or 8FGA
I had the 9 and the 10. They are almost identical for programming with exception of a 7-point throttle curve for the 10. I think you need a 12fg for what you want. Volkert
Posted on: 2/23/2012 1:46 PM by Author "wagen017" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=10972604

RE: Radiance F3A - new pattern kit
Hi Alex and Tommie, congrats on release of this new plane! Question: on the website you mention the plane is electric only. Is this correct? Volkert
Posted on: 2/23/2012 1:41 PM by Author "wagen017" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=10972599