Really Cool Toy (aviation, and a tiny bit of metal, content)

"Kingfish" wrote

To avoid another TWA 800 tragedy, you'd need a fuel cell inerting
device. Then again, without any lives at risk it'd make an impressive
aerial flamethrower...

Why not put a collector on the exhaust, and a small combustion chamber with
igniter. Jet power, anyone? g
--
Jim in NC

On Tue, 2 May 2006 16:05:41 -0400, "Morgans"
wrote:


"Kingfish" wrote

To avoid another TWA 800 tragedy, you'd need a fuel cell inerting
device. Then again, without any lives at risk it'd make an impressive
aerial flamethrower...

Why not put a collector on the exhaust, and a small combustion chamber with
igniter. Jet power, anyone? g

Same inquisitive kid as the Air Hog Guppy. He runs a fireworks stand
so he has a supply of rockets. He bought one of the foam gliders with
about a 30" span. We completely covered it with metallic HVAC tape.
Made it amazingly strong and stiff.

We cut the explosive charge off of 3 of the large rockets. The
propulsion motors were joined into a three stage and mounted on the
belly of the glider.

Two lengths of pvc pipe were cantilevered at the guesstimated proper
angle for a launch rail. After the requisite countdown, the fuse was
lit. That thing took off like a...rocket.

The second stage kicked in on the vertical side of a perfect loop. It
completed a 3/4 loop and rolled upright just as the third stage
touched off. I've seen RC jets at 200mph and this thing must have been
doing at least half that when it came over us...headed straight for my
pickup. Luckily, I had been checking the oil and the hood was up or it
would have gone right through the windshield. No fire but there was an
explosion of foam from the impact.

Any use of "we" instead of "he" in this story is inadvertent.

--Andy Asberry recommends NewsGuy--

"Morgans" wrote in message
news

"Kingfish" wrote

To avoid another TWA 800 tragedy, you'd need a fuel cell inerting
device. Then again, without any lives at risk it'd make an impressive
aerial flamethrower...

Why not put a collector on the exhaust, and a small combustion chamber
with igniter. Jet power, anyone? g
--
Jim in NC

Hmmm, I wonder if there is enough pressure there for a glow-plug to do the
ignition??

"Ron Wanttaja" wrote in message
...
Coupla guys at work are goofing with the four-electric-engined version of
these.... the "Air Hog RC Titan." They found them at Costco for about
$60.

The scary thing about these is that there is no aerodynamic control of
these
planes. Nothing moves except the propellers. All the joystick does is
adjust
the speed of the engines.... push the lever to the right, and the
left-side
engines turn faster. Pull back on the stick and all the engines rev up.

Needless to say, this results in some highly erratic...yet highly
entertaining...flights. The planes themselves are light but incredibly
impact
resistant. They haven't actually broken one yet, even with some fairly
nasty
crashes.

Ron Wanttaja

There is a fair amount of information on the web about the Aero Ace.
Because it flies so well out of the box, it has developed quite a fan club.
There are some mods that can be done to the controller that improve the
controllability.
The three or four I've seen have all been a little light in the nose.
Shifting the battery pack forward definitely helps.
If you're going to fly outside, removing the lower wing lets it fly a little
faster.

Tim Ward

In article ,
"Bob Chilcoat" wrote:

You airplane geeks will love this. My son bought his three-year-old an Air
Hogs "Twin Fury" plane at Toys-R-Us on sale for $12.95 Saturday. This is a
twin-engined pneumatically powered toy airplane that is very, very clever.
Here's a link to a picture of it.

http://www.amazon.com/exec/obidos/tg...3414-1923819?v
=glance&s=toys&n=1162224&vi=pictures&img=14#more-pictures

What is really clever is the design of the motors. These are tiny little
pneumatic motors with only three moving parts each, designed for them by a
consulting firm: http://www.rehkemper.com/airmotor.html The original Air
Hogs pneumatic motor apparently cost 50 cents to make. These new motors are
more efficient and cost 8 cents (!) to make.

When pumped up to the recommended pressure (50 strokes on the supplied pump)
the motors run for roughly 10-15 seconds, initially giving enough thrust to
almost lift the plane on its props. Amazing amount of thrust. Gareth set
his off the first time and claims that it climbed to nearly 300 feet and
flew around for a couple of minutes. The second time it ended up in a high
tree and could not be recovered. No problem; at @ $12.95 he bought another
one. Now that he knows how far it can fly, he's going to be more careful
about where he launches it.

Yesterday I bought one too, only for me.

So you're the marketing director for Rehkemper, Bob? Could your firm
design a spam-powered motor?