RE: Shockflyer Acc??????  
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    • All Forums >> Electric Aircraft Universe >> 3D Electric Flying! >> RE: Shockflyer Acc??????
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    RE: Shockflyer Acc?????? - 4/25/2004 2:40:14 AM   
    wind junkie



    Posts: 964
    Joined: 11/16/2002
    From: N. Syracuse, NY, USA
    Status: offline     		Hey, that's a good story. I think if I tried that, with my luck, and lack of style sense, I'd end up either in prison or detention.

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           Post #: 76

    RE: Shockflyer Acc?????? - 4/25/2004 3:22:37 AM   
    Sky Brother


     

    Posts: 10
    Joined: 8/16/2003
    From: USAF Academy, CO, USA
    Status: offline     		Hey Fellas,
    I have some questions about batteries for the shockflyer. I plan on getting the nippy 0808, Phoenix 10, and using an APC 10x4.7. I have heard of people using lipos from 340 2 cell up to 1500 3 cell. What does more mah give you exactly, just more flight time? I understand that the extra cell gives more power, but how should I choose my mah exactly. Another consideration is that I am in Colorado, at about 7200 feet, I don't think it will make any difference, but not sure. I will probably go with Kokams, they seem like the best value. Anybody tried the new electriflys? Thanks for any help.

    (in reply to wind junkie)
           Post #: 77

    RE: Shockflyer Acc?????? - 4/25/2004 3:27:03 AM   
    plane crash


     

    Posts: 12
    Joined: 1/20/2003
    From: Sylacauga, AL, USA
    Status: offline     		I just bought the shocky 540 and I,m going to order the axi 2208 and jeti 08 monday. What is the best battery pack to buy with it for long flights and good 3d?

    (in reply to Sky Brother)
           Post #: 78

    bigger batteries (mAH) - 4/25/2004 4:40:59 AM   
    wind junkie



    Posts: 964
    Joined: 11/16/2002
    From: N. Syracuse, NY, USA
    Status: offline     		Hi SkyBro,

    Lipo's are getting better all the time, and there are a few larger capacity ones that boast high discharge capability and light weight. It's a little complicated in just saying more mAH will always be better, because a lot depends on the cell's ability to hold a voltage under the load you want to run.

    Right now, the king of the hill is still the Kokam 340 for weight and amps. You can get an honest continuous 7 amps from these. They are the logical choice for shockies and 3D, as this plane won't fly well when it gets heavy (ie, over 8 oz).

    Other new generation cells to compare in the larger sizes are the Irate, Tanic and new Apogee cells. If you want longer times, these seem to have high discharge capability and relatively light weights which mean more flying time. You wil note these combos are in high demand and prices are high also

    Crash, "The Best" battery depends on how long you want to fly, and what draw you'll need. If you're satisfied with 5-7 minute runs on an AXI 2208/34, then the Kokam 340s are good. If you want more time, you may consider the other cells I mentioned.

    BTW, I learned most of this by studying rcgroups, and measuring some of my own bench tests for motors and props I own.

    _____________________________

    Arguing with an engineer is like wrestling a pig. Everyone gets dirty and the pig likes it.

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           Post #: 79

    RE: Shockflyer Acc?????? - 4/25/2004 4:46:29 AM   
    whackinski



    Posts: 260
    Joined: 3/31/2004
    From: Middletown, NJ, USA
    Status: offline     		Brother and Sky Crash. You should use a 2s or 3s LiPo pack 340mAh. I like my Nippy but finally got to see the AXI 2208/34 in action tonight. Depending on the prop/battery combination this rated pack should not exceed the 10 amp rating of the speed control. I say if you dont mind paying a few extra bucks get the AXI with the pheonix speed controller.
    I will be using this combination on my next Shocky!!!
    Check with some other dudes but for this setup try and keep the mAh rating of the pacs to under 800

    I do not think altitude will effect your performance.

    WIND very clever, Detention, he he he

    Can you imagine the headlines... Man arrested for tresspassing and for unauthorized model airplane flying in school.

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           Post #: 80

    RE: Shockflyer Acc?????? - 4/25/2004 4:53:27 AM   
    wind junkie



    Posts: 964
    Joined: 11/16/2002
    From: N. Syracuse, NY, USA
    Status: offline     		Yea, the Axi's are too good to dismiss outright. They arn't that light, but they do have power and efficiency. One came in the mail today. I think Billy Hell's Hobby Lobby barrage of advertiseing worked on me.

    I've been "Axi-Fied"!

    Now I gotta figure out how to mount this thing. I should have a few weeks to think it over, as other projects are intervening.

    _____________________________

    Arguing with an engineer is like wrestling a pig. Everyone gets dirty and the pig likes it.

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           Post #: 81

    RE: Shockflyer Acc?????? - 4/25/2004 5:03:14 AM   
    whackinski



    Posts: 260
    Joined: 3/31/2004
    From: Middletown, NJ, USA
    Status: offline     		Dude I will have to hold out till late June to do another foam 3D but Vertical had the next plane for me. It is classified at this point but boy that guy is a depron master craftsman. He has the AXI set up, it is outstanding. The wind messed things up tonight Vertical had the worst wind but broke a LG axel.
    My goal will be to find a good local indoor facility, the gym I flew in was okay but too small for more than one dude at a time.
    There is an Expo center not too far from me I am going to check it out on Monday.

    I flew my nippy on a 9x7 GWS prop tonight it was okay, with vertical performance and manageble power outside. My next purchase will be a Tanic 3s pac.

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           Post #: 82

    RE: Shockflyer Acc?????? - 4/25/2004 7:06:04 AM   
    Sky Brother


     

    Posts: 10
    Joined: 8/16/2003
    From: USAF Academy, CO, USA
    Status: offline     		Thanks Whack and Wind, yeah I will go with the 340 pack to start off with, and I will probably try some of those other cells you mentioned for some more flight time, something up toward 550 or so. I will probably get the AXI then, but like Wind said a good mount for it is another story.

    If it takes over an hour to charge these lipos, do you guys just buy a bunch and have them all charged up when you go fly, and always keep one on charge or what? It just seems like a lot of down time if you only have one or two. Yeah im excited to get the shocky, it will have to be the Edge.

    (in reply to whackinski)
           Post #: 83

    RE: Shockflyer Acc?????? - 4/25/2004 1:37:34 PM   
    wind junkie



    Posts: 964
    Joined: 11/16/2002
    From: N. Syracuse, NY, USA
    Status: offline     		Seb, How did you like the 9x7? Was it on your shocky? How does it compare with a 10x4.7?

    Sky Bro, I elected to spend a good chunk of change in cells, to have the luxury of not needing to field charge. As you say, it takes about an hour to charge any lipo pack (1C, by definition, as all charger and battery manufacturers recommend). So, no matter how many flights I take, to re-use a pack will always kill the rest of my lunch hour.

    _____________________________

    Arguing with an engineer is like wrestling a pig. Everyone gets dirty and the pig likes it.

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           Post #: 84

    RE: Shockflyer Acc?????? - 4/25/2004 1:40:21 PM   
    whackinski



    Posts: 260
    Joined: 3/31/2004
    From: Middletown, NJ, USA
    Status: offline     		SkyBrother
    You will be thrilled with the ShockFlyer, whether you use the Nippy 0808 or the AXI. I have 4 battery pacs for my Shocky, no 3s pacs yet. I'm going to get 2 of them.
    You can fast charge LiPo's with the right charger, just run some normal cycles on them first.
    Don't cheap out on your charger, get one that reads batery data back while charging. I have been keeping detailed record on charging and discharging my packs. You may want to put some kind of Identification on each pack, I use white Velcro and write a number on it with a Sharpee

    I'm glad to read that you are working a mount for the AXI, I will be looking for a cheaper solution to mounting that motor. Hobby-Lobby just raised their prices, the AXI mount use to be $17 buck now its over $22! I have enough aluminum to make 6 nippy mounts which cost me $2.50.

    Michael Schumacher is dominating at Imola
    Go Ferrari!!!

    _____________________________

    Dont worry your going to WHACK IT!

    (in reply to Sky Brother)
           Post #: 85

    RE: Shockflyer Acc?????? - 4/25/2004 1:52:15 PM   
    whackinski



    Posts: 260
    Joined: 3/31/2004
    From: Middletown, NJ, USA
    Status: offline     		Wind
    I have been flying on the 10.4.7 from the begining on my ShockFlyer. Trying the smaller prop made the plane fly more like a .40 size gas plane. It brought the thrust to weight ratio down closer to realistic but there was still some vertical performance. I am going to try this prop in the forbidden gym.


    Are you watching the F-1 race?

    < Message edited by whackinski -- 4/25/2004 9:00:21 AM >

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           Post #: 86

    AXI mount - 4/25/2004 3:40:14 PM   
    wind junkie



    Posts: 964
    Joined: 11/16/2002
    From: N. Syracuse, NY, USA
    Status: offline     		The "Forbidden Gym" -- LOL.

    Hey, good news I think, I found this thread again over on RC Groups:

    http://www.rcgroups.com/forums/showthread.php?t=217772&highlight=axi+abs+mount

    It's an ABS front edge mount and kit for the shocky. The kit has some carbon reinforcements that stiffen up the foam at the front and towards the back. The designer lives in Portland Oregon and is charging $7 per kit. Seems like a good deal to me and I'm going to try one on my next shocky with the axi. I wish there was a good way to reinforce the center back to the wing with a lightweight ply or similar firewall type mount. There are some post crash pics on that thread, so I guess it's fairly sturdy.

    The best I've seen is John V's axi mount with some light tri stock on the fuse bottom running up to the mount (like the top of the tail). This way the nose wont crumple up. I bet the trick is in wood selection and lightly mounting the motor to the plate.

    No, I'm not watching the F1 race. Just going through mail and getting ready for he day's projects.

    _____________________________

    Arguing with an engineer is like wrestling a pig. Everyone gets dirty and the pig likes it.

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           Post #: 87

    RE: AXI mount - 4/25/2004 4:31:24 PM   
    YNOT



    Posts: 2062
    Joined: 11/29/2001
    From: Lake Jackson, TX, USA
    Status: offline     		A lot of tips in this thread. However did not see my question.

    What about the gear? I really don't want to put it on. 1) I travel for work, ALOT, so it will travel in a case. 2) I intend to catch the plane, but is there a structure reason for the gear/stuts?

    I can run some strip CF down the bottom of the plane so it doesn't get boogied up and I have the prop saver.

    Any thoughts?

    _____________________________

    YNOT, Snap, Flip & Hover,
    Tony D

    (in reply to wind junkie)