ZDZ 80 B2, high altitude and prop

[Eric H]

Hi,

I have a new ZDZ 80 B2 mounted on an airframe that I'll use for free style. I fly at 5500ft.

I have not flown it yet but I tested 2 Menz on ground. The 24/10 gives me 6350 RPM, the 26/8 6150. The 26/8 has slower acceleration but according to my thrust calculator produces more static thrust.

Does anyone have experience w/ this engine at high altitude who could recomend a prop? I would like to chose a suitable mejzlik or similar.

Thanks,

Eric

[dick hanson]

you are on the right track-- keep rpms in mid 6000 NOT lower.
I fly at 4500 ft elevation
the prop must turn faster to deliver same thrust as at low altitude
a Mejzlic or similar shape 26x10 (actually 25.5x10) is largest I would use.
Also narrow and sweep blades of MensS to match the Mejzlic. Done carefully, these props can work well for you

[TeamFlatout]

Meizlic makes a perfect prop for the ZDZ80 26x10n. Its a narrow prop and works very well for the 80. Had one on my ZDZ80.

[Eric H]

Hi,

Thanks a lot for your input.

Eric

[Flyinrazrback]

What about a PT Models 25x10? I know the PT props in all other sizes outperform the mejzliks, great props!