You are currently viewing A mini indoor Potez 58. Specifications.

A mini indoor Potez 58. Specifications.

Too frustrating to be confined to the house with this damn COVID19. Do not give up, stay at home and above all continue to build.

I am embarking on a new challenge. Make a mini Potez 58 to fly indoors and why not in my living room …. For this second objective, not so confident, but let’s try.

First objective, define the size and mass and therefore calculate the wing loading. If we take in comparison a click from RC factory, we have a wing of 80 cm (31 In) for an average rope of 24 cm (9.4 In), which makes a wing load of 6.25g / dm² (1.5 oz/In²)for an aircraft weight of 120 g (4.23 Ounces) (battery included ) and 7.3g / dm² (1.7 oz/in²) if the mass is 140 g (4.94 ounces). Indoor it can fly really slowly. See the example below of the flight of my click 21. It’s good for a gymnasium, but far too big and fast for a smaller space

My osiris weighs a little less than 100 g (3.5 Ounces) and a wing load of 5.2 g / dm² (1.18 oz/In². See below the video of the flight and the speed difference due to a decrease of few wing loading points. The flight becomes slower. Much slower.

Vol de l’Osiris

So if you want to fly in a small space, you have to gain both weight and size, but by reducing the wing load. Which means, lighten everything and the heaviest, the on-board electronics.

So I took the plans of the initial Potez 58 and I increased the wing chord by 75%.

It is printed in 3 sizes, eg. 35, 41 and 50 cm (13.8, 16.14 and 19.7 In) wingspan. It is the 40 cm (16.14 In) one that I will make first. 27-30 g (0.95 to 1.5 once) is the maximum mass to be obtained so as not to exceed 5 to 5.5 g / dm² (1.14 to 1.25oz/In²)


Scientific and passionate about aviation and aeromodelling for 45 years, I am here to share with you my models, my techniques, my achievements and what I have learned over the years.

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