HUMBERT AVIATION TETRAS

The TETRAS is a light aircraft classified as a ultralight, marketed since 1994, with high wings, classic or tricycle landing gear.
It is offered in 5 versions with 2 engines Rotax 912 80 hp or 912 ULS 100 hp : B - CS - CSL - CSR - CTS.

DURANDAL-3
Thank you again for the quality of your work. Our aircraft now all equipped with your propellers: Tetras, Jodel D20 and Joker J300 have never taken off, climbed, crossed and vibrated so well.
R.F. (2023-04-02)

DURANDAL-3
Perfect propeller for my TETRAS, on wheels or skis. Better than what I had before.
L.F. (2023-01-10)

DURANDAL-3
I was told that your three blade propeller was the best on the Tetras. I have tested it and I am convinced. It is a more efficient and pleasant propeller than the one I had before. I am enjoying it, thank you.
Q.D. (2022-10-02)

DURANDAL-3
I am very satisfied with my Eprops three-blade propeller. It is reactive and it pulls hard at takeoff while ensuring an excellent maximum speed. In short, the ideal compromise. Perfect for my 100 hp Tetras. Thank you for this equipment which allows me to use my ultralight to the fullest.
M.C. (2022-08-17)

DURANDAL-3
I had the Duc that Humbert recommends, but the Eprop is far superior in every way. The weight, the smothness, the reactivity, the speed and distance of takeoff and the rate of climb.
Bravo to Eprop.
C.I. (2022-04-17)

DURANDAL-3
A good propeller is essential to have good performance, at takeoff, climb and cruise.
Some pilots conduct their own comparative test campaign, as in this video => https://youtu.be/TN0_9Gs-KgI (2022-02-08)

DURANDAL-3
As I told you, I replaced the 3-blade duc winspond with your 3-blade propeller. What a difference! I gained 40% in performance. I don't recognize my Tetras anymore. It has become a racing ultralight!
I thank you for your good advice.
S.D. (2021-06-18)

DURANDAL-3
Absolutely delighted with my eprop propeller! The price is correct for a carbon propeller with titanium made in France. I am happy with the tests I did because I won on all fronts. A nice surprise because I was told that I could not have better than my original propeller.
F.A. (2021-05-15)

DURANDAL-3
I thank you again for your welcome and the visit of your facility in Vaumeilh.
I mounted the propeller on my 100 hp Tetras on Sunday and did the tests this morning. You can imagine that the performances are incredible, + 500 Ft in rise, and the speed in level is increased of more than 20 %, without speaking about the takeoff which is surprising, I did not believe my badin, so much the needle was panicking, I thought that it was the vibrations of the rolling which disturbed it, but by taking the slope of rise to 110 km / h I quickly realized that there was nothing any more to be believed but only to observe.
Another pilot arrived who has a 100 HP Trial in Les Crots, he went to see a friend who has the same Trial as him but with an 80 HP engine, who has just mounted an E Props and they have the same performance, the 80 HP with an E Props and the 100 HP with a 2-blade...
R.J. (2021-04-02)

DURANDAL-3
An excellent propeller for TETRAS. Thank you for the covers.
L.G. (2020-05-30)

DURANDAL-3
Comparative tests on ULM Tetras equipped with a 2-blade DUC Windspoon propeller then equipped with a 3-blade E-Props Durandal-3 diameter 175 propeller.
Conditions => Total take-off weight : 420 Kg / T°: about 2°C / Pressure at QNH 500 m : 1023 mb / Wind on the ground about 30 Km/h at take-off / Wind on zone : 10 Km/h from north between 3000 and 6000 ft.
The significant results are voluntarily limited between 3000 ft and 5500 ft for powers corresponding to those usually used, i.e.: 4400 to 4800 RPM.
* Rate of climb between 3000 and 5500 ft at 4400 RPM => + 200 ft at 3000 ft / + 100 ft at 4000 ft / + 50 ft at 5000 ft
* Rate of climb between 3000 and 5500 ft at 4600 rpm => + 100 ft at 3000, 4000 and 5000 ft
* Rate of climb between 3000 and 5500 ft at 4800 rpm => + 50 ft at 3000 and 4000 ft / identical at 5000 ft
Indicated speeds between 3000 and 5000 ft => between 10 and 20 Km/h at all powers and all altitudes
Conclusions:
Gain between 100 and 150 ft in rate of climb especially between 3 and 4000 ft, after 5000 ft the rates of climb are about the same with both propellers.
On the other hand the indicated speeds are very clearly higher with the E-Props propeller between 10 and 15 Km/h and sometimes even approaching 20 Km/h.
We can affirm that on the Tetras the E-Props propeller is globally a little bit better in climb and above all clearly superior in cruise.
C.B. (2019-05-15)

DURANDAL-3
I now have 250 hours with my Tetras with the E-Prop. I'm still very happy with the performance. Could you send me maintenance information?
F.K. (2019-05-08)