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DA50 help

Discussion in 'Giant / Scale RC General Discussions' started by Travis Haney, Mar 12, 2018.

  1. So here is the back story. Had motor running great. The last landing, last time I flew it I had a dumb thumb moment and came in a little hard, landing gear spread and hit and broke the prop on the runway. I inspected everything I could think of it all looked okay minus the prop. Replaced the prop, while I was there went up on prop soze from 22a to a 23a. Went out to fly yesterday plane was extremely hard to start and once it did start the idle was way to low to keep it running even with full throttle trim and the transition to full throttle and back down was super slow. Today I pulled the front end apart checked all my linkages ect. All looked good. Tried to start it and no go! Yesterday when it ran there was no odd engine noises it sounded fine just wouldn't run right or well. I think my next move will be pull the carb and take it apart. Is there anything else anyone can think of I should be checking?
    Last edited: Mar 12, 2018
  2. HRRC Flyer

    HRRC Flyer GSN Sponsor Tier 1

    @Travis Haney

    Is it possible that when you landed hard, the impact forced the clunk to the front of the tank, possibly kinking the fuel line inside?
    Travis Haney likes this.
  3. I checked all my fuel lines the clunk and line in the tank are good. It really seems like a fuel problem though. I'm leaning towards dirt in the carb but wondering if I knocked the ignition pickup and that damaged it or something? Really at a loss till I pull the carb.
  4. Bartman

    Bartman Defender of the Noob!

    If you really drilled the nose of the plane into the ground or if the broken prop blade got pushed back into the engine then it's very possible the ignition sensor got pushed out of alignment. For starters, you can check the spark by just passing the magnet in the prop hub past the pickup and if the battery is attached it will make a spark. You don't have to spin it fast, just pass the magnet that is embedded in the hub past the sensor and the spark should happen. Do it a few times to see if it's consistently throwing a spark. Or take a picture of it and someone should be able to tell if it's out of whack.
  5. I checked spark at the field and it was bright and strong. I was thinking more like the timing shifting but looking at the mounting it doesnt look like it's shifted, plus the nose didn't hit hard just caught the edge of the prop on the runway.

  6. Bartman

    Bartman Defender of the Noob!

    What is the difference between a 22A and a 23A? I asked Dave at DA once, what's the right prop for a DA-50 and he said 22x8, so I run a 22x8 on mine.

    Nothing else happened but the prop? Did you try to fly it the same day? How much time passed between when you crashed and when you tried to fly it again?
  8. 49dimes

    49dimes Damn I'm hungry

    A bigger prop is going to load the engine a bit more. I take it your running a Vess which are higher load props any way and just increasing the diameter 1 inch will be noticed. Try putting your needles back to 1.5 turns out and re tune for the bigger prop.
    Snoopy1, Bartman and Travis Haney like this.
  9. I will try that before I pull the carb off.
    49dimes likes this.

  10. I am going to mess with the motor in the morning when I get home and I'm sitting here thinking about it! Am I right in the thinking that a larger prop with more load would cause a rich condition, slower turning not using the fuel as quickly? Or is it the opposite that the engine would go lean not enough fuel to turn the larger mass? I'm not sure why this has me so perplexed...o_O

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