JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 84

filament winding

Development of full composite propulsion systems for UAV take-off
Unmanned Aerial Vehicles (UAV) often need propulsion systems to reach cruising altitude before the automatic pilot system is activated. Low weight is a fundamental prerequisite for successful launches. In this project, the design, prototyping and testing phases of an innovative propulsion system for UAVs are illustrated.
Obviously, the propulsion force generated by the expansion of the gases (and, therefore, the acceleration of the UAV) is parallel to the booster’s axis (red arrow in Figure 1). This description focuses on the design and prototyping of the vessels and booster, produced with composite materials using the filament winding technology.
Fig. 1: Layout of the propulsion system on the UAV

84

jec composites magazine / No68 October 2011

By

1

2

3

4

5

T

The correct definition of the loads supported by the system during the launching phase is of utmost importance for the subsequent design phase. We will distinguish between the loads acting on the vessels and those acting on the booster, as they are of a different nature. To determine the design loads on the vessel, we need to consider that the vessel is filled to a pressure of 50 bar and that the rocket has a maximum acceleration during the initial launching phase (about 6 he system, entirely made of composite materials, is g), which then decreases to 4 g within the following 5 seconds. composed of storage vessels for the oxidising fluid, as well as During this phase, the pressure in the vessel decreases from 50 bar a booster in which the combustion and, subsequently, the to about 35 bar. Therefore, the following three load conditions propulsion generation for the UAV occur. were considered: • Condition 1 Description of the system - Internal pressure: 50 bar The propulsion system developed in this project is composed of - Rocket acceleration: 0 two 16-litre vessels designed to store the oxidising gas, and a • Condition 2: booster in which a convergent-divergent nozzle is located. The - Internal pressure: 50 bar expansion of the combustion gases that generate the propulsion - Rocket acceleration: 6 g = 58.8 m/s² force for the UAV takes place in the nozzle. • Condition 3: Figure 1 illustrates the layout of the vessels and booster on the - Internal pressure: 35 bar UAV, which form a relative angle of 165°. The vessels are - Rocket acceleration: 4 g = 39.2 m/s² connected to the booster by a system of distribution collectors. The above conditions will be used for the dimensioning and

FABIO FRACASSO (1) BUSINESS UNIT MANAGER, SIMONE FRACASSO (2), PROCESS DEVELOPMENT AND PROTOTYPES OFFICE, ANTONIO SPONZIELLO (3) DESIGNER AND PROJECT MANAGER, SEPMA SRL DINO PETRONIO (4), PROJECT MANAGER SELEX GALILEO SPA MIRKO MANCA (5), R&D DEPARTMENT VEM SPA

Definition of the design loads



JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011

Cover
Edito
Point of view: Manufacturing in India
Contents
Agenda of Events
COMPANY & BUSINESS
- In Brief
- Carbon - Melbourne establishes its position in the carbon fibre sector
- Pipes - Amiantit Technology, next-level GRP pipe technology
- Marine - Beachcomber, the marine product specialist
APPLICATIONS
- Construction - New architectural hotel facade designed in GRP
- Automotive - New Pilot Super Sport tyre reinforced with para-aramid fibre
- Pipes - Microtunneling jacking pipes for a combined sewage collector in France
MARKET
- Canada - Canadian Advanced Composites R&D centre continues to grow
- Basalt - Continuous basalt fibre (CBF): a natural fibre for composite applications
- Sustainability - Bilan carbon inventory: factor of competitiveness
Special JEC Asia 2011: the place to be!
FEATURE BI-ANGLE NCF
- The amazing bi-angle thin-ply NCF
- C-PLY™, a new structural approach to multiaxials in composites
- Characterization of the equivalent unidirectional thin ply from NCF
- First prepreg of bi-angle NCF and their mechanical properties
- Pultrusion and Resin Film Infusion (RFI) of bi-angle thin-ply NCF
- Representative test data on bi-angle thin-ply NCF
- Processing bi-angle non-crimp fabrics
- Thin-ply NCF: design for deformation through anisotropy
- Performance enhancement by using a bi-angle composite sandwich beam
- Homogenization made easy with biangle thin-ply NCF
- First and last ply failure predictions by homogenized strength parameters
- Equivalent properties for finite element analysis in composite design
- Predicting the OHT strength of NCF composites
- Thin-ply NCF: design for deformation through anisotropy
RESEARCH & DEVELOPMENT
- Thin-ply NCF: design for deformation through anisotropy
- Filament winding - Development of full composite propulsion systems for UAV take-off
TECHNOLOGY & INNOVATIONS
- Aeronautics - Managing EMI grounding & lightning strike protection
- Sustainability - Natural-fibre pultruded composites – a revolutionary new wood substitute
- LFT-PP - New coloured, nonhalogenated flame-retardant LFT-PP products
Index
In the world
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - Cover
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 2
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - Edito
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - Point of view: Manufacturing in India
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 5
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - Contents
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 7
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - Ad1
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - Ad2
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - Agenda of Events
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 9
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - In Brief
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Carbon - Melbourne establishes its position in the carbon fibre sector
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Pipes - Amiantit Technology, next-level GRP pipe technology
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 13
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Marine - Beachcomber, the marine product specialist
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 15
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Construction - New architectural hotel facade designed in GRP
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 17
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Automotive - New Pilot Super Sport tyre reinforced with para-aramid fibre
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Pipes - Microtunneling jacking pipes for a combined sewage collector in France
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 20
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Canada - Canadian Advanced Composites R&D centre continues to grow
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Basalt - Continuous basalt fibre (CBF): a natural fibre for composite applications
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 23
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 24
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 25
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Sustainability - Bilan carbon inventory: factor of competitiveness
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 27
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 28
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 29
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JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 31
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 32
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - Special JEC Asia 2011: the place to be!
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 34
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 35
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 36
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JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - BGCover
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - BGAd1
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - BG1
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JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - BG74
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - The amazing bi-angle thin-ply NCF
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 52
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - C-PLY™, a new structural approach to multiaxials in composites
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 54
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Characterization of the equivalent unidirectional thin ply from NCF
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 56
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - First prepreg of bi-angle NCF and their mechanical properties
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 58
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Pultrusion and Resin Film Infusion (RFI) of bi-angle thin-ply NCF
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 60
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Representative test data on bi-angle thin-ply NCF
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 62
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 63
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Processing bi-angle non-crimp fabrics
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 65
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Thin-ply NCF: design for deformation through anisotropy
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 67
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Performance enhancement by using a bi-angle composite sandwich beam
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 69
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Homogenization made easy with biangle thin-ply NCF
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 71
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - First and last ply failure predictions by homogenized strength parameters
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 73
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Equivalent properties for finite element analysis in composite design
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 75
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Predicting the OHT strength of NCF composites
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 77
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Thin-ply NCF: design for deformation through anisotropy
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 79
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 80
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Thin-ply NCF: design for deformation through anisotropy
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 82
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 83
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Filament winding - Development of full composite propulsion systems for UAV take-off
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 85
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 86
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 87
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 88
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Aeronautics - Managing EMI grounding & lightning strike protection
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 90
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 91
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - Sustainability - Natural-fibre pultruded composites – a revolutionary new wood substitute
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - - LFT-PP - New coloured, nonhalogenated flame-retardant LFT-PP products
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 94
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 95
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - Index
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 97
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - In the world
JEC COMPOSITES MAGAZINE - Issue #68 Special JEC Asia - October 2011 - 99
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