I understand not having unlimited funds. Good to have nice machining
equipment! I can't wait to see how you do! I don't think the holes alone
will be enough to balance out all the thrust but that's just an opinion
until we do some testing. The devil will be in the details but once
someone is successful getting proper flow and longevity from a pump I'm
sure others will build them.
If there's anything I can do to help you I will, just don't give up! I
want to see you do this!
-------- Original Message --------
Subject: [AR] Re: Turbopump
From: Anthony Graziani <tjgraz11@xxxxxxxxx>
Date: Thu, October 15, 2015 12:16 pm
To: arocket@xxxxxxxxxxxxx
Monroe,
The axial thrust is balanced by the holes in between the blades.
You can read about that here
http://turbolab.tamu.edu/proc/pumpproc/P6/P631-37.pdf
I have access to a HAAS VF3 through my local hackerspace. It's really
overkill for this small impeller, very nice machine though.
My budget for a motor, esc, and batteries is very small. I'm still a
student so my funds are limited...
On Thu, Oct 15, 2015 at 2:49 PM, Monroe L. King Jr. <
monroe@xxxxxxxxxxxxxxxxxx> wrote:
John
Source? Price?
-------- Original Message --------On Behalf Of rclague@xxxxxxxxx
Subject: [AR] Re: Turbopump
From: "John Dom" <johndom@xxxxxxxxx>
Date: Thu, October 15, 2015 11:38 am
To: <arocket@xxxxxxxxxxxxx>
This is going on and on. Why not simply buy a turbopump?
jd
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx]
Sent: donderdag 15 oktober 2015 19:15monroe@xxxxxxxxxxxxxxxxxx> wrote:
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Turbopump
30 horses for 3 kg? Cool. What's it cost?
-R
Sent from my Verizon Wireless BlackBerry
_____
From: Robert Steinke <robert.steinke@xxxxxxxxx>
Sender: arocket-bounce@xxxxxxxxxxxxx
Date: Thu, 15 Oct 2015 10:42:32 -0600
To: <arocket@xxxxxxxxxxxxx>
ReplyTo: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Turbopump
On Wed, Oct 14, 2015 at 3:39 PM, Monroe L. King Jr. <
Watts = 30.66 horsepower. It weighs 3 kg and costs $600. I doubt any
So what's the pumps specs? It will take nearly 30 hp to drive just one
of the pumps to full capacity I'm working on so we can run some test on
electric but to go all the way will take a turbine.
Take a look at this page:
http://finedesignrc.com/motorstp.asp
Scroll all of the way to the bottom. The TP100 motor is rated at 23,000
amateur effort will beat that with a turbine.
wrote:
On Thu, Oct 15, 2015 at 9:01 AM, Anthony Graziani <tjgraz11@xxxxxxxxx>
That's about 1000psi at 1kg/s flowrate for kerosene. Chamber pressure at
Well, assuming about 60% pump efficiency I'll need about 15hp per pump.
about 700 psi should net at least 100N of thrust.
with this size pump is too low. At 700 psi chamber pressure even an
I think Anthony's estimate for the engine thrust that can be produced
amateur built biprop engine should get above 200 s Isp. That means a flow
rate of 1 kg/s would produce a thrust of 200 kgf or ~2000 N. If he is just
pumping fuel and pressure feeding oxidizer then the total flow rate and
thrust will be even higher.
