Airtech
Published

Boat builder Lyman-Morse creates aerospace composite prototype

Prototypes for such clients as the Department of Defense and other government and private sector businesses has become an increasingly important segment of the the company’s business plan.

Share

Lyman-Morse Technologies (LMT, Thomaston, ME, US), a division of Lyman-Morse, has recently manufactured a composite aerospace component for a manufacturer of advanced jet aircraft. The component manufactured is a prototype Radome, a thin fiberglass dome that protects and provides aerodynamic fairing over the aircraft’s primary radar usually located in the nose of the aircraft. The LMT Radome was manufactured to extremely rigorous manufacturing standards and tolerances. LMT designed and manufactured the pattern, mold tooling, and fixtures all in-house with existing staff and equipment.

Prototypes for such clients as the Department of Defense and other government and private sector businesses has become an increasingly important segment of the the company’s business plan. Lyman-Morse Boatbuilding is a custom and semi-custom builder of and service provider for sailing and motor yachts. A family run, father and son business, Lyman-Morse specializes in composites, advanced composites and aluminum construction.

Here are the details on the aerospace prototype:

The pattern for the composite mold was machined by Lyman-Morse’s Haas GR 712 precision CNC router. The pattern was machined from stacked and bonded epoxy tooling board which is geometrically stable at the curing temperature of the fiberglass epoxy pre-preg system. The pattern was designed to compensate for thermal growth of the epoxy board as well as the cross link shrinkage of the tooling system. The Haas GR 712 router machined the pattern with minimal offset to compensate for hand finishing. When all was said and done, the pattern was measured to within .001” of the design target, a challenging task for a 19” diameter article.

Cytec’s LTM-16 fiberglass tooling system was selected to fabricate the all composite mold tool. LTM-16 was selected for its low initial cure temperature of 140°F and its ability to remain dimensionally stable at the 280°F (the processing temperature of Park Electro-Chemical’s E-765 7781 fiberglass prepreg system).

E-765 7781 fiberglass prepreg is qualified under AGATE Aerospace Material Qualification Standards for both primary and secondary flight structure components via the FAA. The fiberglass prepreg was laid up in the mold tool utilizing ply patterns and overlaps developed by LMT and approved by the customer. LMT’s laser placement guide was used to ensure all 40 individual plies were placed in exact sequence and position. Environment conditions were monitored and tracked electronically to ensure both temperature and humidity were within prescribed guidelines.

The layup was then cured for 14 hours per the prepreg manufacturer’s recommendations. During that time, four locations on the part and mold tool were tracked and electronically recorded along with the vacuum within the vacuum bag with LMT custom-built temperature/vacuum data recorder. This step was necessary to ensure processing parameters were meet for the AGATE qualified fiberglass prepreg.

The cured part was machined and drilled to the customer’s specifications, with tolerances of +.005”/-.000”. Final quality checks were completed and found within the customer’s requirements. The part was then painted using Aerospace Certified Paints and Primers. The client will use the prototype as a basis for design and manufacturing refinements.

“We have the know-how and experience with the materials, the manufacturing procedures, the brainpower to trouble shoot and problem solve with these companies. A truly satisfying endeavor for all involved,” said Drew Lyman, president of Lyman-Morse.

Airtech
Eliminate Quality Escapes  With LASERVISION AI
HyperX Software for Composite Structural Analysis
Smart Tooling
Alpha’s Premier ESR®
Airtech
IRIS Ai-enabled Camera
CompositesWorld
Large Scale Additive Manufacturing
Release agents and process chemical specialties
NewStar Adhesives - Nautical Adhesives
Visual of lab with a yellow line

Related Content

Application

Optimized rib-reinforced hollow composites via printed molds

Addyx topology optimization and water-soluble mandrel enables simultaneous rib and skin layup for one-shot, high-strength, lightweight structures.

Read More
Feature

Metal AM advances in composite tooling, Part 2

Toolmakers and molders continue to realize the benefits of additive versus conventional/subtractive manufacturing of molds and mold components.  

Read More
Molds/Tools

Addyx carbon exoskeleton technology enables molded ribs inside hollow composite structures

Using a water-soluble mandrel, carbon exoskeleton opens paradigm for topology-optimized composites, cutting weight, manufacturing time and scrap rate.

Read More
Aerospace

Jamco America partners with Airtech for 3DP tool recycling

Aerospace manufacturer joins forces with composite materials company to achieve sustainable manufacturing practices that overcome traditional composite layup tooling. 

Read More

Read Next

Aerospace

VIDEO: High-rate composites production for aerospace

Westlake Epoxy’s process on display at CAMX 2024 reduces cycle time from hours to just 15 minutes.

Read More
Defense

“Structured air” TPS safeguards composite structures

Powered by an 85% air/15% pure polyimide aerogel, Blueshift’s novel material system protects structures during transient thermal events from -200°C to beyond 2400°C for rockets, battery boxes and more.

Read More
Automotive

Plant tour: A&P, Cincinnati, OH

A&P has made a name for itself as a braider, but the depth and breadth of its technical aptitude comes into sharp focus with a peek behind usually closed doors.

Read More
Airtech International Inc.