my fav distructo was when we took a F4 phantom model and 2 A-6 or A-12's i dont remember witch and a quart jar of smokeless powder ... packed the whole front end of the F4  ... packed in the motors and launched it off a dock out into the lake .... it was way cool  .. it shot out up our ramp and across the lake then took to burning for id guess around 75-100 feet befor  the double skip  sizzle into the water ...  
we sacrifed several models to the cause ,,, but none of them performed the way that poor F4 did . 
Now for your 3000 + footers  didnt you guys use streamers instead of chutes ??  thats what we did ..and we still had to go fetch them outta the center of town ,about 1/2 mile away and down the hill . (insert race of the schwinns here ) 
