If you don't want to use AC engine, you can fly jet with SPEED 400 !

You must accept some conditions of course:

choice appropriate model - not all of our models can be balanced by accupack shifting, suitable model from our production is for example MiG-25 (long nose make possible shifting of less-weight accus), there is possibility to install more powerfull engin in the future

time-up the engine - don't underestimate this fact, it means about 20% of power !

choice appropriate accus - for example NiCD 1000mAh (relatively new accus with size of AR-500 and weight 165g of 8-cell pack

Let you understand that it is really econimic driving, you can fly about 8 minutes. Most suitable airscrew is Günther 125/110. Note that SPEED 400 and MEGA Acn 16/15/4 is the same weight, but power differenc is significant. Comlete model weight is about 530g.