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Mark Allen 1

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Posts posted by Mark Allen 1

    Has anyone tried these new Molicell P45B Li-Ion batteries?

    in Batteries and Chargers

    Posted

    As Ron mentioned my battery pack project took a back seat for a while.

    I can report that a Molicel P45B pack configured to 7S2P (7s 9000mah) flies fantastic in a 90mm EDF when we tested it yesterday.

     

    I chose 7 cells because the ESC can handle it and I wasn't sure how the lithiums would sag under load. The lithium pack gave me more power and a longer flight time, I landed after 9 minutes of mixed flying and used 6000mah so could squeeze more out of it if I wanted.

     

    Telemetry shows the pack temperature reached about 35c in flight, they're rated to 60c

     

    Field charged at 20 amps using a lipo profile.

     

    A very successful outcome.

    Ron may have a flight video 😀

    IMG20240102182510.jpg

    IMG20240113145425.jpg

    liion amps.png

    liion voltage.png

    liion mph.png

    • Like 1

    Ever wanted to get into or improve your aerobatics?

    in In The Air

    Posted

    Graeme, that sounds like an exhilarating flight, well done saving the model.

    Have you considered using perspex or similar to draw your visual adds onto instead of foam board? At the right scale and arms length you will be able to visualise it at the field. Better still ask a helper to review your shapes and give you some feedback.

    Mark

    The 2010 Photographic Competition

    in All Things Model Flying

    Posted

    Not sure if these are competition quality but thought you might like to see some photos from this weekends Rougham 2010 air show, all taken from the spectator line.
     
    Tony Nijhuis B-50, wheel failure on take off.
     
    Extra 500cc
     
    Vector thrust, just hanging around.
     
    Flanker turbine with decoy flares
     
    Dawn Patrol
     
    Warbirds
     
    Tony Nijhuis Hurricane
     
    Dawn Patrol - Ali Machinchy



     
    Extra 500cc

     

    Edited By Mark Allen 1 on 03/05/2010 21:55:57

    Intro-vert

    in RCM&E Plan Builders

    Posted

    Andy, I ordered the 5g motor but should have probably gone for the 10g as I will only be flying outdoors.  I will finish the build then consider the upgrade!
     
    When you say "full fuse" do you mean box section build like the intro-vert?

    Intro-vert

    in RCM&E Plan Builders

    Posted

    Andy, thanks for the build info and video.  My electrics are in the post, hope to get them soon so I can get into the air.
    From your video this looks like a great aircraft to take on our summer holidays and fly in the evening sun!
    Mark

    Intro-vert

    in RCM&E Plan Builders

    Posted

    Hi, I have started to build one too, planning to go with the outdoor wing.  Never built from a plan before so it's all new to me.  Bought three sheets of depron as required and will have loads left over, I even wondered about scaling the intro-vert up.
     
    Tail plane and fin is currently at the glue stage.
     
    Electrics next,  need to do some web shopping.

    Contra rotating helicopters and beyond

    in Helicopters

    Posted

    Hi Roy, like yourself I wanted to move on from my CX2. Looking at reviews I decided to get a Mini Titan E325 or Trex 450.  In the end I bought a Trex500CF! !  Like previous aircraft models I have bought, I thought why buy something only to buy a larger version later on.
     
    I took a couple of months building it following lots of tips and advice on the web there is a lot to learn moving from up the contra heli. Following lots of tail in hovering (the noise was fantastic) and one crash after losing orientation, I bought the Phoenix Sumulator and practiced like mad.  The Sim has allowed me to progress to fast forward flight which is fantastic fun. 
     
    All in, this has taken me twelve months but I have been in no rush and really enjoyed each stage of progression.
     
    It handles the breeze better than my electric fixed wing machine getting between 5 and 8 minutes of sport(ish) flying per battery, I have 2200mah, 2500mah and 3000mah batteries. 
     
    I cannot claim to be anexperienced flyer but wanted to show that jumping from a contra to a 500 is very achievable. Quite an initial investment though, batteries, charger, radio, gyro etc but they are all items I use for my aicraft too.
     
    Mark
     
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