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Skippers Walker

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Posts posted by Skippers Walker

     Free flight Indoor Model Microfilm Plans and complete Kits (rubber powered)

    in All Things Model Flying

    Posted

    Thanks for the information Robin. I've recently made contact with Josh Finn of J&H Aerospace USA and they may be a possible supplier of the required materials/modern plans. I also checked your suggestions on the Outerzone site and found them interesting too.

     

    Indoor Micofilm modelling is certainly very popular in the States with many of the disiplines taught and encouraged through school science activities.

    Thanks again for your input.

    SW

    Discharging LiPos to Storage Charge Level

    in All Things Model Flying

    Posted

    On 13/10/2023 at 16:41, Tosh McCaber said:

    Don't know if anyone can help.

    I've just bought an FD-200 discharger, on the advice of club-mates, who tell me that it is essential to store batteries at storage charge. 

    https://www.amazon.co.uk/ISDT-Control-Battery-Balance-Discharger/dp/B07VW7HZLJ/ref=asc_df_B07VW7HZLJ/?tag=googshopuk-21&linkCode=df0&hvadid=501156581681&hvpos=&hvnetw=g&hvrand=5368442662330318663&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9046836&hvtargid=pla-823020257985&psc=1

    I'm having problems (as several reviewers have pointed out) with the left hand button, which is somewhat non reactive and temperamental, not allowing various rates of discharge. However, I think that working it from the App for it will be OK.   I'll persevere a little before a decision to send it back to Amazon.

    The instructions are not very clear.  To clarify a major confusion for a novice to batteries (me!), the discharger has, firstly, a selection of 2S up to 8S batteries (controlled by the temperamental button).  It also has various rates of discharge- ranging from 5 to 25 amps on the other button. (As well, there is obviously the C rating for the battery in the computation.) I don't want to discharge at a rate too high for the battery voltage and amp-hour rating 

    To my question! 

    Will I be safe to set a battery discharge rate to whatever the voltage (S Rating) the battery is, and then calculate the rate of discharge to make sure that it is below the Amp Hour rating x C rating for the pack?  For example, if I have a 2200mah 3S battery pack rated at 40-50C, I assume that, so long as the discharge rate is less than 2.2x40 = 80amps, I could select any of the discharge. But what safety margin should I use?

     

    Corona Servos

    in All Things Model Flying

    Posted

    I've purchased and used a number of Corona Servos in recent years with absolutely no operating issues. I always trawl the market to check for a seemingly reliable supplier and prices before ordering. UK and Chinese suppliers are numerous on the internet.

    Good luck

    SW

    • Like 1

    Corona Servos

    in All Things Model Flying

    Posted

    On 11/10/2023 at 10:11, Nigel Heather said:

    Apologies I have asked this question before but buried in another thread and not very directly.

     

    Are Corona servos any good?

     

    They have been suggested by a kit manufacturer but before that I'd never heard of them - I now understand that they are predominantly a HobbyKing brand.

     

    Anyone with any experience of them.  In particular do they centre well, what is the accuracy like, durability (do the metal gears wear well). 

     

    Compared with the likes of Hitec and Savox they are significantly cheaper and, on paper. better specified.

     

    But are they great, okay or best avoided?

     

    The ones I would be considering are the 22g Mini DS-238MG and the 32g Mini-Standard DS-339MG

     

    Many thanks,

     

    Nigel

     

    Futaba T6K Flap-Elevator Mixing? Arrows Bigfoot electric model

    in Futaba

    Posted

    You are right Matty, at last the penny has dropped in my rather tired brain. I used your suggestion of setting a high value in flap switch position 2 (fully down).  When moving the switch to flap down position 1 (half flap), the corresponding elevator movement does appear to be 1/2 the value at position 2. A straight line! 

     

    I'll certainly look at using P.MIX 4 programme (preferred by Dave Greer), at some stage and experiment with the results from various inputs. For simplicity's sake for now, I'll fine tune the achievable settings using the FLP-ELE MIX and carefully fly the model at height and try to find a happy medium for the two Flap down positions.

    Thanks again for your guidance, very helpful

    Happy flights

    SW

    • Like 2

    Futaba T6K Flap-Elevator Mixing? Arrows Bigfoot electric model

    in Futaba

    Posted

    Thanks again Matty.

    Re the current mix response that I've achieved; with a 'Rate' set at 15% I appear to get a small elevator down movement in flaps down Pos 1 (about 1/2 flap) and at full flap Position 2, the elevator down movement has incrementally increased ...possibly to 15%?. I'll have to experiment more. 

    The folk that I fly with are predominately Spektrum users and therefore the programming on their TX's is quite different to Futaba's approach. I do find the manual for my R/C kit written in a tad Chinese/English at times. The old and limited Fleet system mixes were all achieved with manual slider switches in the rear of the TX  

    Such is progress.

    SW

    Futaba T6K Flap-Elevator Mixing? Arrows Bigfoot electric model

    in Futaba

    Posted

    I now begin to understand Matty. I've just tried your suggestion, setting 15% as a nominal down elevator mix to Flap down position 1. Without touching the 'OFFSET' setting I appear to be getting a slightly increased down elevator mix when selecting full down on the Flaps. I haven't quite figured out what effect changing the 'OFFSET will have. At present the values in offset visually change from -100% (-100%) when the flaps are fully raised, -100% (0%) at flap down 1 and 100% (+100%) when flaps 2 are fully down. I apologise for appearing rather dumb about all this but the T6K is my first modern TX since graduating from a Fleet 35MHz system from the 1970's! I'm approaching 80 now and a bit slow in absorbing the modern tech but very willing to keep trying.

    Thanks for your patient explanation about the issue. Thanks also to the other folk for their well intentioned offerings about my question😁

    SW

    • Like 1

    Futaba T6K Flap-Elevator Mixing? Arrows Bigfoot electric model

    in Futaba

    Posted

    I have the flaps set up to operate on a 3 position switch (C) Channel 5 on my Futaba T6K TX. Please is there anyone that can provide a simple to understand method of mixing the Flap/Elevator to prevent 'ballooning' when the flaps are lowered incrementally? I have a manual but I'm getting a bit confused as to how to set the required values during the two down flap positions.

    Thanks SW 

    Soldering/binding piano wire.

    in Building from Traditional Kits and Plans

    Posted

    I certainly endorse Tom Gaskin's comment about rigorous cleaning to ensure a good solder joint. For the heavier gauge wire I often use silver solder, flux and a gas torch to make a really strong 'bind'. Again cleaning the materials is absolutely paramount for success.

    Good luck Basil, try a few practice joints too before attempting the real thing?

    SW

    Propeller Reaming

    in All Things Model Flying

    Posted

    Thanks for all the comments, I've eventually ordered a stepped reamer, there appears to be quite a supply problem around the model shops?. Plenty of 'Great Planes' reamers in the US but the cost is transport costs are prohibitive!

    Cheers for now SW

    Keil kraft Falcon Electric Power Supply set up

    in Building from Traditional Kits and Plans

    Posted

    The chosen power unit for this model is a Surpass C5055 600Kv with a 4S 3300 Lithium battery. My issue is which sensible ESC unit should be used with this motor? Confusion has arisen because when researching suitable information about  ESCs to use, one source suggested a 60 mah, another 80 mah and a third 100 mah!

    Considering that gentle flight characteristics of this large model can any one solve my dilemma based upon practical experience please?

    KK Falcon Electric Power Conversion. Motor Thrust Line(s)

    in Building from Traditional Kits and Plans

    Posted

    Hi Mike

    I started building F/F models in the 1950's so I do agree with you that we then powered up, put a bit of left or right trim on the rudder tab and launched! With a bit of luck the model would assume a gentle circling flight pattern and stay within sight for recovery down wind.

    If I could have afforded a Falcon in those days I guess that it would have had a 10cc petrol or diesel up front. I think that I'll start off with zero/zero and as it's a gentle model see what happens from that point. I did electrify a Junior 60 a couple of years ago and eventually found that a trifle of down thrust certainly helped.

    Trial and small error I hope.

    The Falcon has been a very long build for me but I'm really hoping to finish it within the next couple of months and to fly it during the coming summer. I'll keep you posted with progress.

    Cheers for now

    SW (Chris)

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