Personally, I'd go much bigger for the 29mm version. If a F21 takes the 24mm version up to 3100 feet, that's way too high for my "normal" flying field. I'd probably never get it back.
It would be more expensive, but to me the 29mm would need to be pretty big. Otherwise, with a BT60, you'd be stuck using the smaller engines in the 29mm range. (There are a lot of choices for 29mm motors).
I'd vote for a BT80H (Heavy Wall) 29mm version. Then you could fly it with an E16...all the way up to some G's if you really wanted to ring it out. I've been thinking about building a BT80 sized Sprint for a while. TTW fins would be nice if you decide on a bigger one.
I don't think a "kit" of the larger sizes would be practical for me to make. How about just the important stuff?
The major parts only for a 1.88" Sprint would cost anyone $30 a set for just a nose cone and tail cone.
A 2.6" set for the TT-T-80 heavy wall tube would be $38 a set.
You supply the main body tube and motor tube from Totally Tubular.
I only mention Totally tubular because I have easy access to the tube and I want some consistancy in my product. There are a LOT of companies out there that make a 2.6" tube...BUT...!!!
Totally Tubular T-80....2.60" O.D.
Vaughn Bros. BT-2.58...2.684" O.D.
Public Missles PT-2.5...2.56" O.D.
LOC BT-2.56...............2.63" O.D.
See my problem...Otherwise all the parts woukld have to be custom made for each set.
You guys have to understand what is involved in putting together a limited run of 10 or so kits...
Order all the parts
cut all the tubes to length
bag up all the "little parts" (centering rings, launch lugs, shock cords...etc)
It's a LOT of work.
And not to complain 'cause you guys always seem to "clean me out" but sometimes I get a little nervous when 16 people want one of my kits I get parts for 16 kits and you guys only order...5 kits...well like I said...eventually you will clean me out but in the meantime...I have a conciderable investment in time, money and labor tied up.
These are my current "stock". If the demand is there I will make more!
I have the following kit ready to ship;
Quantity of 8 (eight)
Saturn 1B's with paper wraps. (complete) $13.50 each
Quantity of 4 (four)
Mini BT-20 sized Sprints (13mm powered). $12.00 each
Quantity of 2 (two)
BT-50 sized Sprints (18mm powered) $16.00 each
Quantity of 4 (four)
BT-56 sized Sprints (24mm powered) $26.00 each
(Decals should be in my hands by Wensday or Thursday)
Quantity of 3 (three)
BT-80 sized Sprint (29mm powered) Nose cones and tail cones. These are not kits! but they do include a cardstock fin pattern.
You have to provide the BT-80 heavy walled body tube (2.64" O.D.) 25.5" long or longer if desired. $38.00 for the set.
Shipping is $2.50 for parcel post and $4 for priority mail.