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Simon UK

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Posts posted by Simon UK

    Blackhorse Cap 232 40 size

    in Power System Selection

    Posted

    A mate just handed me a Cap 232 that has seen better days, i have stripped all the covering from it and intend to electrify it.
    My buddy says it originaly ran on a 46 2 stroke, but that was later changed to a 60 2 stroke as power was lacking.
     
    I am considering the XYH50-55 580kv Brushless Outrunner from Rob at Giant Cod, seems to get good reviews from folks that have bought it. My dilema is the number of cells to use with the motor. I would like to get the same 60 size 2 stroke performance from the plane if possible (to prove a point). I reckon the 60 2 stroker would have spun a 13" prop so i think 14" should be  possible regarding ground clearance.
     
    So 5 cell lipo or 6 cell lipo is the question? I have ruled out a123's as they are only 2300mah and duration would suck!
     
    Thanks for any advice guys
    SImon

    SC 52fs

    in IC Engines

    Posted

    I think i will pick up a 13x4 prop from my lhs this week. Thanks for all the advice guys, and especially thanks Peter for the tips including the way of thinking about prop pitch as car gears. That actually makes things much clearer in my tiny brain.
     
    As you correctly state top speed is unimportant to my cub, i would much prefer better acceleration

    SC 52fs

    in IC Engines

    Posted

    Thanks for the fast reply Peter

    So you don't think that the engine needs a new set of piston rings then, good news as it saves me a few quid and some time. A tacho is a piece of equipment i will have to pick up in the next few weeks. Should i be looking for specific numbers from the tacho, i'm currently on an 11x6 prop but i may go to a 12x5/6 or a 13x4 to try to get a stighlty more scale appearance.
     
    I don't need exact numbers just a ballpark for me to use as a guide.

    SC 52fs

    in IC Engines

    Posted


    Hi guys i'm not a nitro head so when i recently bought a 2nd hand sc 52fs i was really suprised to find i had absolutley no problems in getting it started, i even manageed to set up the idle so it ticks over nicely.
     
    My concerns are these, firstly there is virtually no compression when turining it over by hand, and thats with the trottle fully open. Secondly the final 1/3rd of the throttle band does not provide a noticeable increase in rpm. I am also not convinced that i am getting full power from the engine. Although it's fitted in a H9 Cub and it's plenty powerfull enough for the model.
     
    So my questions are these, is it a worn piston ring/s? and if so are these easily replaced and aquired? I am not sure how old the engine is but it was a bargain and it runs so i'm not complaining, just trying to get the best from it
     
    Cheers
    Simon

    Blackburn Monoplane

    in RCM&E Plan Builders

    Posted

    Thanks David, i have found the plan and article here
     
    http://www.myhobbystore.co.uk/product/18106/blackburn-1912-monoplane-plan-mag1523
     
    One last question please, is there any reason to buy the plan if i have the old magazine plan? Are the seperate plans the same or better quality?
     
    Thanks Again
    Simon

    Blackburn Monoplane

    in RCM&E Plan Builders

    Posted

    Hi guys
     
    I wonder if one of you could help me, a friend has talked me into building (in truth it didn't take much effort)  the Blackburn Monoplane from the November 2002 issue of RCM&E. 
     
    My problem is this, he has the plan as he removes them from the magazines when he gets them, but has long since had `she who must be obeyed` throw the magazine out (in her deffence - i suppose a mag thats 8 years old getting thrown out is understandable).
     
    Anyway my question is this, sadly the Electronic back issues only go as far back a Jan 2007, so if anyone has the accompanying article that came with the plan, i would love a copy of it. Looking at the plan there are a few areas that are not 100% clear and i was hoping the article would clear things up.
     
    So any help wuold be greatly appreciated.
     
    Cheers
    Simon

     
     
     

    Arising Star Power Issue

    in General Electric Flight Chat

    Posted

    Hmmm not ideal then Timbo, i have a Turnigy accucel 6 at the moment but it cap's out at about 3 amps for 6 A123 cells. Which leaves me not taking advantage of the batteries as you are well aware.
     
    As i am not asking for an endorsement :P but some advice is there a Hoby King or Giant Cod charger you would buy yourself (if limited cash was in the equation).
     
    I have no problem plodding away at 45-50 minute recharges until i get a new one, so if there is an all singing all dancing must have charger i could save for a wee while and plump for that if it was highly recommended.
     
    Cheers
    Simon

    Arising Star Power Issue

    in General Electric Flight Chat

    Posted

    Just a bit of an update on the Arising Star
     
    I tried my new 6s1p A123 pack on Saturday, i set my timer for a conservative 4:30 minutes and took off. Great news as the plane could fly on 1/3rd throttle and when i landed after time was up, the pack only took 730 mah to re-fill to capacity. Yipee! I have now set my Timer for 8 minutes and i should have plenty of juice in the battery pack for extra go around if needed.
     
    Thanks for the advice guys
     
     

    Arming switch

    in General Electric Flight Chat

    Posted

    Thanks for taking the time to answer guys, Peevie i am just looking a way to easily recharge my A123's in situ, the plane is a H9 Cub 40 and it's quite an old kit so no nice battery hatch like the new model has - and to be honest i don't think the new model would take a 6s a123 pack anyway. So mine will sit where the fuel tank should go, i have allready made the hatch in the top of the fuz, alas there is no way of easily opening and closing the hatch due to the windscreen having to be attached aswell.
     
    Hmmph! I reckon i can keep my wiring very short for a seperate charging plug, so i am going to go for it.
     
    Thanks for the advice

    Arming switch

    in General Electric Flight Chat

    Posted

    No Martin not really, i had read that it was bad practise to lengthen the battery cables, but to be honest i can see no other way of running 2 packs in parrallel with a seperate charging socket. Maybe you can enlighten me?
     

    Also i fail to see how it could damage the ESC surely the current having to travel a little further cannot make That much of a difference?
     

    Arming switch

    in General Electric Flight Chat

    Posted

    Hi Peevie
     
    Excellent work and thanks for taking the time to post pictures of your wiring loom, my only question is in the bottom picture, the way i figure the circut the bottom deans (male) should be flipped over in the picture, is this correct? 
     
    I need to make a loom up for my H9 Cub as i'm using A123's and your pictures have saved me a major headache
     
    Cheers
    Simon

    Wiring layout

    in General Electric Flight Chat

    Posted

    Great post Olly, now here's a question , if i wanted to leave the batteries in situ (say A123 cells) and therefore would like easy access to charging. How and where in the Wiring setup would i run a seperate charging plug say to the side of the fuzz?
     
    I hope my question makes sense, and a diagram would speak a thousand words
     
    Cheers
    Simon
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