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Aim for the sky and try not to miss!
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Marauder
By: Kevin Tmimins
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Kevin's entry sports a two stage appearance although it is a single stage rocket.  Designed for 18mm motors simulations show it to be a great performer with a modification to 24mm.

Kevin's entry provides this information:

Hi,

attached is my entry for the Design of the Month Contest May 2003 Pics are from Rocksim, and the parts list is below.  Designed for B / C Engines although with the modification to a 24mm mount, The Simulations are great on D size

I havent built this yet.

Thanks
Kevin Timmins


Parts List

Sustainer parts
Nose cone Estes - Estes - BNC-50Y, Material: Balsa
Nose shape: Hollow Ogive, Len: 4.350 In., Dia: 0.976 In.
Wall thickness: 0.125 In.
Body insert: OD: 0.851 In., Len: 0.500 In.
CG: 2.425 In. , Mass: 0.160 oz.
Radius of gyration: 0.041730145408 (m) , 4.173015 (cm)
Moment of inertia: 0.000007898880 (kgm^2) , 78.988803 (gcm^2)

Body tube Estes - EST 3086 - BT-50, Material: Paper
OD: 0.976 In. , ID: 0.950 In. , Len: 4.000 In.
CG: 2.000 In. , Mass: 0.102 oz.
Radius of gyration: 0.030612420491 (m) , 3.061242 (cm)
Moment of inertia: 0.000002708912 (kgm^2) , 27.089119 (gcm^2)

Parachute - Custom, Material: Polyethylene LDPE
1 parachute, Shape: 6 sided
Dia: 12.000 In., Spill hole: 0.000 In.
CG: 1.000 In. , Mass: 0.050 oz.
Radius of gyration: 0.015455754887 (m) , 1.545575 (cm)
Moment of inertia: 0.000000338402 (kgm^2) , 3.384018 (gcm^2)

Transition - Custom, Material: Cardboard
Solid transition: Fwd. Dia: 0.976 In., Len: 2.000 In., Rear Dia: 1.595 In.
Font body insert: Len: 0.500 In., OD: 0.940 In.,
Rear body insert: Len: 0.500 In., OD: 1.585 In.,
CG: 0.940 In. , Mass: 0.059 oz.
Radius of gyration: 0.038100729605 (m) , 3.810073 (cm)
Moment of inertia: 0.000002412040 (kgm^2) , 24.120396 (gcm^2)

Body tube Estes - EST 3089 - BT-60, Material: Paper
OD: 1.637 In. , ID: 1.595 In. , Len: 12.250 In.
CG: 6.125 In. , Mass: 0.846 oz.
Radius of gyration: 0.091088637142 (m) , 9.108864 (cm)
Moment of inertia: 0.000199110908 (kgm^2) , 1991.109083 (gcm^2)

Fin set - Custom, Material: Balsa
Planform: trapezoidal, Root chord: 2.750 In., Tip chord: 1.500 In., Semi-span: 2.000 In., Sweep: 4.250 In., Mid-Chord: 4.140 In.
Misc:
Location: 0.625 In. From the front of Body tube
Thickness: 0.125 In.
Profile: rounded
CG: 3.010 In. , Mass: 0.118 oz.
Radius of gyration: 0.040496610356 (m) , 4.049661 (cm)
Moment of inertia: 0.000005488700 (kgm^2) , 54.887004 (gcm^2)

Fin set - Custom, Material: Balsa
Planform: trapezoidal, Root chord: 2.375 In., Tip chord: 0.750 In., Semi-span: 3.125 In., Sweep: 2.599 In., Mid-Chord: 3.600 In.
Misc:
Location: 9.500 In. From the front of Body tube
Thickness: 0.125 In.
Profile: rounded
CG: 1.926 In. , Mass: 0.136 oz.
Radius of gyration: 0.036936893580 (m) , 3.693689 (cm)
Moment of inertia: 0.000005246069 (kgm^2) , 52.460694 (gcm^2)

Body tube - Custom, Material: Cardboard
OD: 0.748 In. , ID: 0.709 In. , Len: 2.400 In.
Location: 0.000 In. From the base of Body tube
CG: 1.200 In. , Mass: 0.043 oz.
Radius of gyration: 0.018796292184 (m) , 1.879629 (cm)
Moment of inertia: 0.000000427130 (kgm^2) , 4.271300 (gcm^2)

Ring - Custom, Material: Cardboard
Centering ringOD: 1.595 In., ID: 0.748 In., Len: 0.080 In.
Location: 9.875 In. From the front of Body tube
CG: 0.040 In. , Mass: 0.050 oz.
Radius of gyration: 0.011214665764 (m) , 1.121467 (cm)
Moment of inertia: 0.000000177010 (kgm^2) , 1.770104 (gcm^2)

Ring - Custom, Material: Cardboard
Centering ringOD: 1.595 In., ID: 0.748 In., Len: 0.080 In.
Location: 0.000 In. From the base of Body tube
CG: 0.040 In. , Mass: 0.050 oz.
Radius of gyration: 0.011214665764 (m) , 1.121467 (cm)
Moment of inertia: 0.000000177010 (kgm^2) , 1.770104 (gcm^2)

Launch lug Estes - ESTES 2321 - LL-1/8, Material: Paper
OD: 0.125 In., ID: 0.113 In., Len: 1.250 In., Loc: 5.125 In.
CG: 0.625 In. , Mass: 0.002 oz.
Radius of gyration: 0.009238067086 (m) , 0.923807 (cm)
Moment of inertia: 0.000000004397 (kgm^2) , 0.043968 (gcm^2)

The links below will lead you to Kevin's documentation for this design.  These links will open a new window.


 

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