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  • #1 by Cheredanine on 03 Aug 2017
  • So building a 5 inch sub250g is all well and good but I ended up buying multiple types of the same sort of parts, do for contingency I built a 4 inch racer :)

    Frame : kinetic aerial Air-Ro
    Really nice frame, light, strong and plenty of build room

    raceflight milivolt flight controller
    Raceflight spark 4in1 esc
    Yet to see how raceflight flies but very nice, simple and easy build, and ancreadibly easy to set up with rf1

    Armattan oomph 1407 3850kv
    Arrow mini (micro on the way)
    Tbs unify pro with cloverleaf antenna pigtail (that is not gonna last)
    Frsky xm+
    Forevertube over the standoff antenna mounts
    470uf 25v low esr cap

    Gonna maiden on gemfan 4045 and tattu 650mah 4s, auw about 220g, bench thrust about 3.2kg

    Also test dal 4045 tris and hq4x4.3x3v1s

    See what flight time comes in like

  • #2 by Cheredanine on 05 Aug 2017
  • Slight prop upgrade
    And 235g auw :)



  • #3 by ched999uk on 05 Aug 2017
  • Looks good, now we just need to see both your sub 250gms quads in action  ::)
  • #4 by Cheredanine on 05 Aug 2017
  • Lol blown an esc on the asguard on the 5 inch, replacement on the way
    This thing is very interesting though, it isn't expensive (frame is 38usd)
    The rf kit could be replaced with the flytower (hglrc) 20mm 25 amp esc stack for about 40quid, the motors with dys se1407 3600kv and the cam with a swift micro.

    Still running rf stock rates as getting used to flight characteristics, (only put 2 lipos through it after tuning out yaw oscillations) and it flies differently from 5 inch, it is fast but it turns on a penny, much sharper. Will try and get some fpv cam footage tomorrow, flight times off a 650mah tattu 4s are longer than I get off a 5inch racer on r-line 1300mah,
    Really like it
  • #5 by Cheredanine on 05 Aug 2017
  • Here you go mate, this one is too much fun not to fly when I have chance, family away, so teatime session
  • #6 by ched999uk on 05 Aug 2017
  • Looks good. With it being so light do you think it will be more impacted by the wind?
    I guess as it is lighter it might have less momentum and thus change direction a bit quicker too.

    Wish I had tried building a sub 250 now... Oh well just an excuse for Christmas or next birthday  :smiley:
  • #7 by Cheredanine on 05 Aug 2017
  • That is a common mate, there was some wind there, can't say I noticed, but wasn't very strong
    I didn't particularly show it on that vid but it changes direction much quicker than 5 inch.
    I would say the hq props are miles better than the others I tried (dal and gf)

    The frame is not expensive at all, and As above, I think it can be done considerably cheaper and just as effectively

    I did look at a number if the new 4 inch frames that are not just 5 inch cut downs, came down to the air-ro or the CMW superlight 4r
    But the Air-Ro is half the price and stronger
  • #8 by Cheredanine on 06 Aug 2017
  • Looks good. With it being so light do you think it will be more impacted by the wind?
    I guess as it is lighter it might have less momentum and thus change direction a bit quicker too.
    Ok mate, just got back from flying in what I would call "blustery" winds, held aspect perfectly, speed was effected but no more so than a good 5 inch racer, thinking smaller results in less wind effect
  • #9 by Cheredanine on 12 Aug 2017
  • Ok adding a bit, was at the flight line today getting some bb logs from my 5inch sub250g when a coulple of the guys turned up and set up a technical short course, 5 gates with difficult lines, 2 flags.
    I had this quad with me and had to say it definatley held its own, the course had no real long too end runs where the 5 inch quads could use top end, tight corners are easy on this thing.
    I have to say I really like it, will be building another shortly :)
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