Mikel-T ,
The US41 would be the weakest engine ever installed in this plane.
If your wanting to enjoy the performance the plane was designed for, you
should get a engine in the 1 to 1.5 HP/Lbs area.
Any light 50cc to 62cc engine will do the job well.
The plus of getting a 50cc over the 62cc is that many more planes are being
designed for this size engine now.
Most popular engines for the 28% Wild Hares;


1. DA 50
2. ZDZ 50
3. Brison 3.2
4. BME 50
5. FPE 3.2
6. Taurus 52
7. MVVS 58 (evo 58)
8. 3W 50
9. Zenoa G-62

At only 3HP & 4.5 lbs. the US 41 will be a big disappointment.
Hope this helps,