On Behalf Of Kimberly Harms
Tuesday, August 24, 2004 5:51 AM
Project for BlackRock
Hello Rocket Comrades!
There has been some talk about the project that the Community Space Program
is doing for BALLS. I have not commented much because I wanted to hold
comments until I was sure that the project will be done and ready for launch
at that event.
I can now say, unless something unforeseen happens, we will be ready for
BALLS with our project:
It is a FULL SCALE HONEST JOHN
Yes that is correct!
Statistics:
Length: 27 feet 3 inches
Diameter: 24 inches body and 30 includes at the nose bulge
Weight: Our latest estimate of the pad weight is 675 pounds. We have actual
weights on all parts but final weights will be taken after final finish
work.
Propulsion: Four O4800. Each is 38,000 Ns (by static test measurement).
Total Ns in the project is 152,000 (less spin motors). This makes it about
86% Q. Initial thrust of each motor is just over 1000 pounds rising to a
peak of 1250 pounds. Total burn time 7 seconds. Propellant and motor
hardware was made by team members John Lyngdal and Matt Rupert. Thrust
curve:
https://www.hcatech.com/csp/o4800.jpg
Construction of the airframe was made using 24" sono-tube for the main body.
The lower part of the nose below the "bulge" is also the same sono-tube,
just built up on the outside with structure to achieve the conical shape.
The nose part (above the bulge) is built of standard "insulation panel foam"
using a "stacked disk" approach, filled and fiberglassed. A central core in
this part joins it to the "below the bulge" part of the nose. This joint is
fixed and is not intended to separate.
The project separates at a point in the main body section 6' above the fins
(modified Stu Barrett anti-zipper design). Recovery will be a single event
using three 28 foot "man rated" mil surplus C9 chutes. The main section
will descend under 2 and the nose section under the other.
The fins were constructed with approximately the same method used in a
number of our projects. . A root, tip, and spar (a wood - G10 - wood
laminate) forms the basic shape. On to this is built a structure using
rigid closed-cell polyurethane foam shaped to the airfoil needed and covered
with thin plywood. This achieves a "stressed skin" structure similar to an
aircraft wing. We have used this same approach on the fins for our last
years O - N BALLS project, and the XPRS 4 L1120 cluster project and the fins
performed as designed. The fins are, of course, removable and the mounting
system we are using is the same as in the real M31 - a front and rear pin
and a though the wall bolt anchoring the bolt into a constructed "pocket" in
the airframe. The fins are wider at the root that the M31. Since we are not
using metal, we need the extra strength. Each fin weights about 13 pounds.
And YES, there will be eight spin motors and we will be using them. However
we are not canting the fins as in the real M31 so the spin will not be as
pronounced. The real M13 has a 2 rps rate - way faster than we will go. The
airframe separation joint is keyed to hold the parts in alignment with the
anticipated spin.
How high and how fast? I'm not sure I trust any of the simulation programs
with this but we should do around 15k and approach mach.
Since this is an operational flight the full OD green paint job with white
markings is used.
The team members for this project are:
Kimberly Harms
6206, L3, TAP
John Lyngdal
9257, L3, NAR L3CC
Christopher Scott
7903, L3, Prefect TRA Puget Sound, NAR L3CC, NAR Trained Safety Officer
Andy Casillas
6550, L2
Steve Bayer, 1538, L2
Steve Bloom, NAR 71920, L2
Stu Barrett, 1277, L3, TAP
Rick Clapp, 8579, L3
Gwynn Daniels, NAR 71291, L3
Greg Deputy, 2911, L3
Pat Floyd, 5595, L3
Ellen Gonser, 3901, L3
Tom Gonser, 2171, L3
Ed Jacoby, 5876, L3, TAP
Kent Newman, 10097, L3
Matt Rupert, 6607, L2
Traci Scott, NAR 73816, L3
Jim Wilkerson, 2733, L3
At the event just look for the people in the green T-Shirts with dog tags
and it will be one of us!
During the time this project has been in the works I have received email and
calls from many people. Some thought that the project was very cool.
Others were fortunate enough to see a real Honest John launch. And some
remember building the Estes kit and it was their favorite. Estes did
reissue it, so it must have been a favorite for a lot of people.
Enjoy!
John Lyngdal - HoJo Team Member
Tuesday, August 24, 2004 5:51 AM
Project for BlackRock
Hello Rocket Comrades!
There has been some talk about the project that the Community Space Program
is doing for BALLS. I have not commented much because I wanted to hold
comments until I was sure that the project will be done and ready for launch
at that event.
I can now say, unless something unforeseen happens, we will be ready for
BALLS with our project:
It is a FULL SCALE HONEST JOHN
Yes that is correct!
Statistics:
Length: 27 feet 3 inches
Diameter: 24 inches body and 30 includes at the nose bulge
Weight: Our latest estimate of the pad weight is 675 pounds. We have actual
weights on all parts but final weights will be taken after final finish
work.
Propulsion: Four O4800. Each is 38,000 Ns (by static test measurement).
Total Ns in the project is 152,000 (less spin motors). This makes it about
86% Q. Initial thrust of each motor is just over 1000 pounds rising to a
peak of 1250 pounds. Total burn time 7 seconds. Propellant and motor
hardware was made by team members John Lyngdal and Matt Rupert. Thrust
curve:
https://www.hcatech.com/csp/o4800.jpg
Construction of the airframe was made using 24" sono-tube for the main body.
The lower part of the nose below the "bulge" is also the same sono-tube,
just built up on the outside with structure to achieve the conical shape.
The nose part (above the bulge) is built of standard "insulation panel foam"
using a "stacked disk" approach, filled and fiberglassed. A central core in
this part joins it to the "below the bulge" part of the nose. This joint is
fixed and is not intended to separate.
The project separates at a point in the main body section 6' above the fins
(modified Stu Barrett anti-zipper design). Recovery will be a single event
using three 28 foot "man rated" mil surplus C9 chutes. The main section
will descend under 2 and the nose section under the other.
The fins were constructed with approximately the same method used in a
number of our projects. . A root, tip, and spar (a wood - G10 - wood
laminate) forms the basic shape. On to this is built a structure using
rigid closed-cell polyurethane foam shaped to the airfoil needed and covered
with thin plywood. This achieves a "stressed skin" structure similar to an
aircraft wing. We have used this same approach on the fins for our last
years O - N BALLS project, and the XPRS 4 L1120 cluster project and the fins
performed as designed. The fins are, of course, removable and the mounting
system we are using is the same as in the real M31 - a front and rear pin
and a though the wall bolt anchoring the bolt into a constructed "pocket" in
the airframe. The fins are wider at the root that the M31. Since we are not
using metal, we need the extra strength. Each fin weights about 13 pounds.
And YES, there will be eight spin motors and we will be using them. However
we are not canting the fins as in the real M31 so the spin will not be as
pronounced. The real M13 has a 2 rps rate - way faster than we will go. The
airframe separation joint is keyed to hold the parts in alignment with the
anticipated spin.
How high and how fast? I'm not sure I trust any of the simulation programs
with this but we should do around 15k and approach mach.
Since this is an operational flight the full OD green paint job with white
markings is used.
The team members for this project are:
Kimberly Harms
6206, L3, TAP
John Lyngdal
9257, L3, NAR L3CC
Christopher Scott
7903, L3, Prefect TRA Puget Sound, NAR L3CC, NAR Trained Safety Officer
Andy Casillas
6550, L2
Steve Bayer, 1538, L2
Steve Bloom, NAR 71920, L2
Stu Barrett, 1277, L3, TAP
Rick Clapp, 8579, L3
Gwynn Daniels, NAR 71291, L3
Greg Deputy, 2911, L3
Pat Floyd, 5595, L3
Ellen Gonser, 3901, L3
Tom Gonser, 2171, L3
Ed Jacoby, 5876, L3, TAP
Kent Newman, 10097, L3
Matt Rupert, 6607, L2
Traci Scott, NAR 73816, L3
Jim Wilkerson, 2733, L3
At the event just look for the people in the green T-Shirts with dog tags
and it will be one of us!
During the time this project has been in the works I have received email and
calls from many people. Some thought that the project was very cool.
Others were fortunate enough to see a real Honest John launch. And some
remember building the Estes kit and it was their favorite. Estes did
reissue it, so it must have been a favorite for a lot of people.
Enjoy!
John Lyngdal - HoJo Team Member
