"Wee bit" would be the correct term. Single stage, centrifugal compressor.
The best ones don't offer close to 4:1 in those designs. A tad better than
3:1 is typical without VSV.
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
-----Original Message-----
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On
Behalf Of qbert@xxxxxxxxxxxxxxx
Sent: Thursday, November 05, 2015 2:49 PM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Almost a rocket and I want one..
I'd bet those are a wee bit more than typical RC turbine in both design and
thrust. There are bigger ones used in gliders and small aircraft like the
Jet Beetle's, They have the H250 at 275lb max thrust at sea level and about
120lb at 10,000m, again fly it up there and then let her go using parachutes
to bring the turbines home. With a price point of 11K per, that's a pretty
cheap reusable first stage for an amateur rocket. BTW, I have actually been
tinkering with this idea since Paul mentioned his Air Launch light plane
idea. I would bet that Jet beetle could tweak their H250 to get better power
and altitude if that's what you wanted as each one of the engines are hand
made. Just think of the advantage of starting the rocket portion of the
flight at 15000m at .75 mach.
Robert
At 09:03 AM 11/5/2015, you wrote:
Yeah they suck fuel and have a very limited altitude range.
Otherwise they would make a very good first stage without any wings at
all. They develop about 150lbs thrust > -------- Original Message
-------- > Subject: [AR] Re: Almost a rocket and I want one.. >
From: "Anthony Cesaroni" <acesaroni@xxxxxxxxxxx> > Date: Thu, November
05, 2015 8:43 am > To: <arocket@xxxxxxxxxxxxx> > > > They also have a
BSFC from hell primarily due to the low compressor ratio. > > Anthony
J. Cesaroni > President/CEO > Cesaroni Technology/Cesaroni Aerospace >
http://www.cesaronitech.com/ > (941)
360-3100 x101 Sarasota > (905) 887-2370 x222 Toronto > > -----Original
Message----- > From: arocket-bounce@xxxxxxxxxxxxx
[mailto:arocket-bounce@xxxxxxxxxxxxx] On Behalf Of Monroe L. King Jr. >
Sent: Thursday, November 05, 2015 6:34 AM > To:
arocket@xxxxxxxxxxxxx > Subject: [AR] Re: Almost a rocket and I want
one.. > > Those turbines don't have VSV's so they don't do very well
with altitude changes. > > > -------- Original Message -------- > >
Subject: [AR] Re: Almost a rocket and I want one.. > > From:
qbert@xxxxxxxxxxxxxxx > > Date: Wed, November 04, 2015 10:23 pm > >
To: arocket@xxxxxxxxxxxxx > > > > > > I never considered that as I've
always been convinced that mixing the > > two systems is just way more
difficult. Dropping the turbines with a > > chute attached makes part
of the system reusable with out having to > > make the rocket part come
home. > > > > Robert > > > > At 09:58 PM 11/4/2015, you wrote: > > > >
I assume because you want to drop the turbines and wings when you're >5/11/2015 5:55
done with them and then you may as well make them into a re-usable >
'aircraft' type device... > > >On
pm, > > ><<mailto:qbert@xxxxxxxxxxxxxxx>qbert@xxxxxxxxxxxxxxx>
wrote: > > >mmmm Gives me an idea Paul. You mentioned awhile back
taking your > > >peroxide rocket to 25k using a light airplane to do an
air launch. > > >why not just strap a pair of turbines on with a set of
wings, "cruise > > >missile style" and presto a poor mans air launch. >
wrote: > > >><https://www.youtube.com/watch?v=gCYSWyHDpfU>https://wwwRobert > > > > > > > > >At 08:45 PM 11/4/2015, you
.youtube.com > > >>/watch?v=gCYSWyHDpfU > > >> > > >>or > > >> > > >>
<http://jetpackaviation.com/>http://jetpackaviation.com/
