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  1. #1

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    36 inch Profile plane Going Glow

    Hay guys could use some help never used a glow yet what would be a good 3D engine and size. Something with quick throttle response and power for a 36 Balsa Profile.

  2. #2

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    Which plane do you have?
    McDDD
    ProBro 415

  3. #3

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    A scratch built , I built it similar to a Primo but a mojo .25 size and weight. 34oz

  4. #4

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    3D profile planes the size and weight of a Mojo 25 end up flying a LOT better with electric power instead of glow power. There is no glow engine available at any price to compete with electric power in that size range.

    The problem is that if you use a glow engine that gives a Mojo 25 a good power to weight ratio for 3D, then the engine weight raises the wing loading to an unacceptable high level for 3D flying. If you use an engine light enough to keep the wing loading to an acceptable level, then it won't have enough power for 3D flying.

    If you absolutely insist on using a glow engine in your plane, then look for an old Norvel bushing 25. It still won't be able to compete with an electric power system, but the Norvel 25 will give you the best overall performance with a glow engine.
    McDDD
    ProBro 415

  5. #5

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    Thank You I have been watching your videos on U Tube I will go with your advise and drop the glow power until I move up to a larger plane. I have a NTM 3536/1400kv motor ,10x5 apc prop, Hobby wing 60amp ESC and Nano Tech 2200 3s lipo. I had this in my 41 inch 3DHS Extra 540 with 4 12gr Corona servos. What are your thoughts about this set up on this plane.Motor puts out 510 on 3s w-10x5 and 540 w 11x5 on 3s. Weight on this package is ( Electronics) 445gr/16oz. Reweighed flying weight is 36.68 oz.Would greatly value your opinion on this.Click image for larger version. 

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  6. #6

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    I'm not an expert on electric power systems for 3D planes. You will need to go to the probro site to find those guys. But since your electric setup came out of a 41" 3DHS Extra, it should work even better in a Mojo 25 size plane, including the servos. If you can run the 11x5 prop without over amping any part of your power system, then that prop should work best. You will need a wattmeter to find that out for sure.

    Keep in mind that the Mojo 25 is an old design that came out before electric power was an option. Back then we flew those planes with OS 25FP, Norvel 25, and similar engines. Today it just doesn't make sense to use those engines in a 3D plane, or nearly any other plane for that matter.

    If you watched my video of the Sabre 35, it is almost exactly the same size as a Mojo 25. But the Sabre 35 only weighs 24 ounces ready to fly including a 3S 1500 lipo. At 24 ounces it only needs a Super Tigre .10 electric motor to make it a great flying 3D profile. If the Sabre 35 was 12 ounces heavier, a lot of that great 3D performance would disappear.

    If you watched my Wild Tiger videos, I would consider that plane to be the smallest plane where glow power is still an option. (The new Primo 25 is basically the same plane but with a "Primo" style fuselage and tail.) As of today, I'd consider an engine such as an OS 40FP or a Thunder Tiger 42GP to be the smallest glow engines worth putting in a 3D profile.......and that's only if you use a Mousse Can Pipe to boost the power to an acceptable level. Any plane smaller or heavier than the Wild Tiger will perform better with electric power.
    McDDD
    ProBro 415

  7. #7

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    Thank You I will stick to the electrics. The Pro Bros site is where I will take it. Ya Looking for a great 3D performance with that extra power to weight ratio. Mine always seen to be more on the heavy side. With a mid power range. Thanks again and happy flying. Oh one last thing tried to register at probros and can't get past that confirmation question. Is their some sort of catch to that. Nothing seems to work. Have a great evening I have a much better understanding of it all now. I'll keep trying on the brotherhood site.


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