Ron,
What battery config. are you using with the stumax and what kind of output are you getting with it? I was curious to compare it with the turbax 9s , 10s setup that John has been using.
Chris I'm running 11s 30c 5000 mah in my Spark(2-4s+1-3s)... I'm getting 3600 watts with that...and the thrust is crazy. Stu's isn't the fastest fan but has really good thrust for vertical. With that said I'm still getting 170 mph at full throttle. Others are running it on 12s 30 and getting 4500+ watts
I know 9s will get you around 2700 watts....I'd guess 10s 30c will put you around 3200 watts... but this fan is lighter than the turbax
Stu Fans is about 1.8 pounds
pretty sure the turbax is around 2.2 pounds and the dyn-e-max scropion up around 2.5 maybe a bit more
Tams is the lightest I think it's 1.5 or a tad less.... so with Stu's fan or Tams your going to save close to 2 pounds of weight
Stu's sound just amazing! for a scale plane it's very hard to beat that sound, like a quite turbine... I'm a huge fan of Stu's
Tams is a light weight power house but makes more niose... he is working on a new 7 blade stator and a soft mount that may reduce the sound..
Stu's or Tams would be a great setup
Sound is very important to me... if it is to you then you have to go with Stu's Fan
Ron