Do able and practical -
both subjective
For whom?
13 lb 1300 sq in models with 40s are easily do able by good scratch builders .
They are not available for the BARF crowd - so not yet practical .
Having done 40 stuff at 11 lbs --and 100 stuff at almost 30 lbs (they both worked exceptionally well) the envelope of combos is still awfully subjective.
A local guy has a new 40% Cap with a 160 - and I think with pipes it is 34 lbs -
that is another "do able - but as a practical kit - no way . He likes outlandish power -
In contest work - the "best " setups show up differently than the "do able stuff .
Example
my 40 powered 11 lb model (wing loading was 19 oz ft) was tossed around to various TOC pilots for evaluation
The general concensus - Toooo much power and tooo light ---for FAI pattern.
for just plain fun tho--
-very good .
The 2200 sq in 29+ lb Extra- with a small fast revving prop -on a 100 (no tuned pipes) looked wrong -by most stds- but was a winning setup - and super quiet - many would have said -neither do able or practical
i am doing a 1750 sq model with an 80 single -weight likely (base on building 4 others) 23 lbs - as a 3D model
this one fits both do able and practical - as the kit is an ARF and the engine a inexpensive -powerful well proven design.
I would also like to hear other opinions on do able and practical - the general concensus is - -no general agreement!