Discussion Overview
The discussion explores the feasibility of using an elliptical trammel design for an opposed combustion engine configuration, specifically with two vertical and two horizontal cylinders. Participants consider the implications of such a design on engine performance and mechanics.
Discussion Character
- Exploratory, Technical explanation, Debate/contested
Main Points Raised
- One participant questions why an elliptical trammel has not been used in opposed combustion engines, suggesting it could function similarly if pressure is fed in a loop.
- Another participant acknowledges the possibility of using an elliptical trammel but cites potential bearing lubrication issues due to high surface velocity as a reason for its lack of implementation.
- Concerns are raised about balancing the assembly at high speeds, with suggestions that offset cylinders or multiple trammels might be necessary for balance.
- A comparison is made to radial engines, noting that the proposed design could resemble a radial engine with fewer pins needed for operation.
- It is mentioned that a four-piston engine would likely require a two-stroke design without a closely coupled flywheel, as four-stroke radial engines typically need an odd number of cylinders, usually more than six.
Areas of Agreement / Disagreement
Participants express differing views on the practicality and challenges of the elliptical trammel design, indicating that multiple competing perspectives remain without a clear consensus.
Contextual Notes
Participants note potential limitations such as lubrication challenges, balancing issues at high speeds, and the design requirements for two-stroke versus four-stroke configurations, which remain unresolved.