🚀 go-pugleaf

In article <1993Jan5.015534.19691@rtsg.mot.com> svoboda@rtsg.mot.com (David Svoboda) writes:
>In article <42995@sdcc12.ucsd.edu> dlou@ece.ucsd.edu writes:
>|
>|
>|Anyone have any experience with the Estes Astro Blaster?
>
>Well, no, but I wanted to clear up some things about .049's.
>
>|3> the .049 pusher configuration means you can't use a clunk tank (the
>|clunk will be facing the wrong way) 
>
>Okay, here's what you do.  Use a normal tank with a balloon inside.
>The idea is to have the balloon fill the interior of the tank without
>inflating.  The balloon is held in place by the tank cork.  Then 
>instead of clunk and vent lines, you use a straight tube going to the 
>lower back of the tank, with notches cut through it (and smoothed so 
>as to not cut the rubber).  You just cut a small hole in the outside 
>of the tank for a vent.  When you fill the tank, first suck the air
>out from inside the balloon, then fill away.  It really works.

This is a variant on what Doc Passen calls the "Limpy Bladder" that was
popular for a while in Slow Combat. I used them because I couldn't afford
$10 chicken hopper tanks. They worked really well too. Haven't tried it 
with an .049 though.

>|and the QRC/Texaco/Black Widow
>|engines won't go inverted which, 

>I've never had a QRC or Texaco, but I assure you that a Black Widow
>has an inverted fuel system.

Sort of. Out of the box its set up for control-line, with the fuel pick-
up shoved over to the right side of the tank. It will therefore fly in-
verted but the engine will only use half the tank. For other uses one 
usually opens up the tank and puts the end of the tubing at the bottom 
of the tank. 

>You can also buy tank mounts for TD 049s that handle inverted flight.
>That will give you more power than a Black Widow.

Or do what I did.. use a bladder tank on a Tee Dee! I got ridiculous 
altitudes using a Tee Dee on a HOB Two Tee with about an ounce and a 
half of fuel in a bladder tank in the fuselage bay under the wing.

For a pusher though you will either need a pusher prop or a left hand 
crankshaft (I think Kustom Kraftsmanship carries them). The reed valve
engines turn either way with ease.. quite a pain sometimes when start-
ing! 9-)

What about the Queen Bee .074? I've heard it wasn't designed to have more 
power than a Tee Dee .049, just better adapted to throttling. You use the 
same 6x3 prop.





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Iskandar Taib                          | The only thing worse than Peach ala
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