Paul Morris

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Viewing 15 posts - 1 through 15 (of 15 total)
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  • in reply to: "Upcycling" Tiger Trainer 40 kit #4943
    Paul Morris
    Participant

    Hi Graham

    Overlander do a motor 4240/10 890kv this will run on 3s-7s but requires a 12×6 prop and gives 540 watts and you would need a 60amp speed controller.
    (you need a larger prop with less cells)

    Regards

    Paul

    in reply to: "Upcycling" Tiger Trainer 40 kit #4941
    Paul Morris
    Participant

    Hi Graham

    This seems to be the norm at the moment as a lot of equipment is out of stock, yes you are on the right track you used the same calculator as me which is the one I used.
    The other suggestion is to ring and speak to robotbirds (01753694171) as they do combo’s (motor & esc) and they will be able to help much better than I can as they have been in the business of electric flight for as many years as I can remember.

    Regards

    Paul

    in reply to: "Upcycling" Tiger Trainer 40 kit #4939
    Paul Morris
    Participant

    Hi Graham
    Have a look at hobbyking web site for turnigy aerodrive motors sk3-3542 1000kv (£32-04) this is 670 watts a bit more than you want but that is on 4s so will be less on 3s. you can also throttle back when in the air and you never know when the extra power will be required. You may have to get a 60amp speed controller but once again look on hobbyking website.
    There is also ripmax quantum 11 40 brushless motors M-Q2-40 (£39-99) with a 60amp speed controller but this is on 4s .
    I suggest you have a search on the various web sites
    Electric wingman
    Nexus model supplies
    Als hobbies
    ETC

    Regards

    Paul

    in reply to: Dihedral #4903
    Paul Morris
    Participant

    I believe that when conversion takes place dihedral is reduced by 50% but it depends on whether the model is high wing or low wing.
    The dihedral of a wing determines the amount of self-correction capability an aircraft has in the roll axis.
    More dihedral allows more self-correction at the expense of less lift, more drag and less axial rolls. Nevertheless, dihedral is sometimes necessary and is especially important for trainer aircraft.
    Aircraft designs having no ailerons need dihedral in order to turn using only the rudder.
    An aircraft that has no ailerons and no dihedral will tend to yaw and skid through rudder turns. Some dihedral is always required for rudder only aircraft models.
    It is sometimes necessary to change the dihedral of an aerobatic design to rid the aircraft of undesirable traits such as rolling when rudder is applied (roll coupling)

    in reply to: Dihedral #4902
    Paul Morris
    Participant

    Hi Ian

    I believe that when conversion takes place dihedral is reduced by 50% but it depends on whether the model is high wing or low wing.
    The dihedral of a wing determines the amount of self-correction capability an aircraft has in the roll axis.
    More dihedral allows more self-correction at the expense of less lift, more drag and less axial rolls. Nevertheless, dihedral is sometimes necessary and is especially important for trainer aircraft.
    Aircraft designs having no ailerons need dihedral in order to turn using only the rudder.
    An aircraft that has no ailerons and no dihedral will tend to yaw and skid through rudder turns. Some dihedral is always required for rudder only aircraft models.
    It is sometimes necessary to change the dihedral of an aerobatic design to rid the aircraft of undesirable traits such as rolling when rudder is applied (roll coupling)

    in reply to: Engine Mounts – self tappers or proper bolts? #4855
    Paul Morris
    Participant

    What I do is drill and tap the engine mount and bolt the engine to the mount using the tapped holes and cap head bolts then put a nyloc nut on as an extra security measure.

    • This reply was modified 9 months, 4 weeks ago by Paul Morris.
    in reply to: "Upcycling" Tiger Trainer 40 kit #4515
    Paul Morris
    Participant

    If you have the RG411 in your parkzone glider and its been in thermals then perhaps the info about that receiver is a bit miss leading
    but in a bigger heavier model i would still go with the RG631 as it has basically dual receivers eg: main and satellite

    Regards

    Paul

    in reply to: "Upcycling" Tiger Trainer 40 kit #4513
    Paul Morris
    Participant

    As for the electric motor work on 100 watts per pound and you will not be far out
    eg 4lb model requires 400 watt motor and then you can work out what esc you need I would suspect about 60 amps
    Regards
    Paul

    in reply to: "Upcycling" Tiger Trainer 40 kit #4511
    Paul Morris
    Participant

    Hi Graham
    No you need the rg631b as this is full range
    The rg411b is only classed as a park flyer which is not full range
    Electric motor and esc you need the equivalent of an sc40 which you should be able to find on the interwebby thing

    Regards

    Paul

    in reply to: "Upcycling" Tiger Trainer 40 kit #4509
    Paul Morris
    Participant

    Hi Graham
    The rg631b receiver has a satellite receiver connected to it and is full range with telemetry that’s why 2 antenna’s on the main receiver and only one on the satellite
    The rg411b has telemetry but is classed as a park flyer receiver hence no antenna
    As for servo’s like you say those are 20 years old so new would be the best bet at that price

    Regards

    Paul

    in reply to: "Upcycling" Tiger Trainer 40 kit #4507
    Paul Morris
    Participant

    Those servo’s should be ok
    With regard to the two voltages those servo’s run on both what you normally find is at 4.8v they have a slower time and less torque than if they are running on 6.0v
    How old are these servo’s???
    If in doubt change them for hitec HS311 as they are £37-00 for 4 from the servo shop
    maybe cheaper at other retailers???
    Regards

    Paul

    in reply to: "Upcycling" Tiger Trainer 40 kit #4505
    Paul Morris
    Participant

    What are the servos eg futaba, hitec, sanwa etc
    Ordinary hitec servo’s HS311 should be ample for that model
    why not get another receiver for your jr set
    most glow plug engines sell for a pittance on ebay so try the BMFA web site
    regards
    Paul M

    in reply to: Electric Twin. #4298
    Paul Morris
    Participant

    Hi Ian

    Ian is correct as you only want one ESC feeding your Rx make sure all plugs are orientated correctly and there should be no reason why it should not work.

    in reply to: Control line circle at the National centre. #3839
    Paul Morris
    Participant

    I agree with what others have written, £28,000 is nothing compared to what was spent buying and setting up the national centre at buckminster. Should all aspects of our hobby be catered for ? not just one or two

    Paul Morris

    in reply to: Website – Problems Logging In #3225
    Paul Morris
    Participant

    Hi Paul
    Having no problems logging in either the web site or the forums maybe at club night this could be explained before the talk.
    Regards
    Paul

Viewing 15 posts - 1 through 15 (of 15 total)