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MH 32 airfoil

What is the MH 32 airfoil used for? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio

Also called: mh32, mh32 coordinates, hepperle mh32, f3b airfoil, f3j airfoil, mh32 dat, rc glider airfoil, mh32 flap

Exact dimensions. True size, with no printing tolerance added.

sizes
6 in table

Notes

  • Martin Hepperle designed the MH 32 as a flapped airfoil for F3B and F3E models, intended to run negative flap for speed (MH-AeroTools).
  • UIUC tests at Re 200,000-300,000 matched predictions for the upper laminar bucket; at Re above 100,000 drag rises below CL about 0.25, and Stuttgart tests extended useful range below zero lift with flap (MH-AeroTools).
  • It remains a reference section: Model Aviation's soaring column compared newer F3J airfoils against the MH32 and SD7037 at Re 100k.

MH 32 airfoil size chart

parametervalue or rangesource
Design useflapped F3B / F3EMH-AeroTools
UIUC test Re200,000 and 300,000MH-AeroTools
Stuttgart (IAG) test Re100,000 and 200,000; flap -3, 0, 5, 10 degMH-AeroTools
Lower bucket limit (Re > 1e5)CL about 0.25MH-AeroTools
LE geometry sensitivity0.25% chord deviation shifted bucket ~0.1-0.2 CLMH-AeroTools
Coordinates sourceMH-AeroTools airfoil pagesMH-AeroTools

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

MH-AeroTools (M. Hepperle)MH 32: Some Wind Tunnel ResultswebPublisher's page; dimensions are facts
Model Aviation (AMA)Radio Control Soaring column, July 2002webPublisher's page; dimensions are facts

Xem scan

File coming

No downloadable true-size file yet: the published figures do not fix the whole shape, and Xem never guesses a number. A measured scan is planned; request it and it moves up.

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Plain text: sheet.txt · JSON: /api/geometry?object=mh32-airfoil

Schematic, not to scale.

Fits with

Clark Y airfoil4 sizes★ sheet
Selig S1223 airfoil7 sizes★ sheet
Eppler E387 airfoil3 sizes★ sheet
AG35 airfoil (Drela AG series)5 sizes★ sheet

Questions

Does MH 32 need flaps?

It was designed as a flapped section, using negative flap for speed runs (MH-AeroTools).