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Peak Models 32% Extra 330 SC

Discussion in 'Giant / Scale ARF Build Threads' started by 49dimes, Apr 8, 2015.

   
  1. Xpress

    Xpress GSN Sponsor Tier 1

    The closer to the ground you are the less distance the airplane has to fall :oblong::banana-dance:
     
    Snoopy1, pawnshopmike and 49dimes like this.
  2. Snoopy1

    Snoopy1 640cc Uber Pimp

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    With the 72 up front what do you expect the weight to be with that engine.
     
  3. 49dimes

    49dimes Damn I'm hungry

    Overall the same. Will lose the additional weight (custom battery tray) that is over the engine now. Batteries will get strapped back to the sides of the motor box. The 72 is about 3/4 pound heavier than the 50.
     
    Snoopy1, pawnshopmike and Alky6 like this.
  4. 49dimes

    49dimes Damn I'm hungry

    Alien performance upgrade showed up today :). I like the new smaller footprint and wide voltage range of the RCAME ignition too! The HV lead has a smaller diameter as well and is much easier to manipulate around tight spots. The plug cap is 10mm so a nice snug fit with a CM-6 plug.

    0417181314-00.jpg 0417181322-00.jpg 0417181345-00.jpg 0417181345-01.jpg
     
    Luchnia, Snoopy1, Alky6 and 2 others like this.
  5. 49dimes

    49dimes Damn I'm hungry

    So I finally got off me duff and started the engine change out. Been talking with a friend via email who has two of the 72's. He is currently flying one of the two in an EF91 Extra. Reports are positive but the second engines ignition was faulty (RCAME). DJ has come out with a new ignition for this engine. Had a picture of it but I forgot to save to my computer :ugh:. Looks similar to the MSR ignitions made for MVVS.
    So looking forward.....I'm looking at going from 5.5hp to 7.5hp to haul a 20 pound plane :big-grin:. Looks as if it will be "Drop In" ease :).

    Oh! The 72 will be getting the same filter / velocity stack treatment as the 50 has. This has been a great asset keeping the internals of the plane nice and clean and keeping the internals of the engine from wear due to dust and debris. To date the Alien has 32 flights of about 7 minutes each.

    0630181250-00.jpg 0630181252-00.jpg 0630181254-00.jpg 0630181250-01.jpg 0630181335-00.jpg
     
  6. stangflyer

    stangflyer I like 'em "BIG"!

    A little extra power never hurt anyone, right?
     
    49dimes likes this.
  7. 49dimes

    49dimes Damn I'm hungry

    Nope. Not that I'm aware of :cool:. A 70cc class engine is best suited for this plane and to be honest the cowl was designed for a 70cc twin.
    I'm very pleased with the DL50 however and am really looking forward to getting it mounted back up to the Pilot Extra. That plane is going to have "Insane" power at tap. Sould fly like my 3D foamies :). From the reports I have read the 72 should get the Alien very close to that as well :happy:.
     
    HRRC Flyer and stangflyer like this.
  8. stangflyer

    stangflyer I like 'em "BIG"!

    Yee ha! It's good to go vroom vroom with foamy performance in a dino juice powered 'frame. Bring it on.
    double-thumbs-up-smiley-emoticon.gif
     
    49dimes likes this.
  9. Snoopy1

    Snoopy1 640cc Uber Pimp

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    Power wise you are going in the right direction. From my experience which is not a lot in 3D but but have done a lot building and changing. The following rules for 50cc apply 16 lbs ok but no more 14.5 lbs great and 12 lbs way to light. My next 50cc hopefully will be around 13.5 to 14 lbs I belive that will be just right for all round 3D flying.
     
    49dimes likes this.
  10. 49dimes

    49dimes Damn I'm hungry

    Got as far as getting the 50 off the airframe and installing 3/4" inch stand offs. This will put the spinner back plate about 1/8" off the cowl.
    The difference in weight of the two engines is 6.8 oz.

    0701181522-00.jpg


    The battery tray I made weighed 5.2 oz. Putting both batteries back to the left side of the motor box should make it a wash as far as CG goes :). I also got some side by side shots of the two engines for those who may be interested. Fit and foot print are " drop in". Will have to re configure choke and throttle control rods. The up down position of these controls on the new engine are reversed ie...Choke rod on top, throttle rod on bottom.

    0701181451-00.jpg 0701181349-01.jpg 0701181451-02.jpg 0701181452-00.jpg 0701181457-00.jpg





    0701181453-00.jpg 0701181454-00.jpg 0701181454-01.jpg 0701181455-00.jpg 0701181455-01.jpg
     
    Snoopy1, Luchnia, Jetpainter and 2 others like this.
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