Summary of October 8, 2026 CAD Review

Under review: Foundation 1, Iteration 37


Objectives:
	Validate key dimensions on injector assembly
	Validate tolerances on injector assembly
	Validate machined throat and combustion chamber
	Perform risk analysis on engine assembly

Classifications for mechanical evaluation:
	GREAT = Low risk of part failure
	GOOD = Low-moderate risk of part failure
	ACCEPTABLE = Moderate risk of part failure, lowest acceptable level of risk
	UNACCEPTABLE = High risk of part failure, cannot be flown
	BAD = Very high risk of part failure, cannot be flown



1: Validating key injector assembly dimensions
	Fuel injection shim holes diameter: GREAT 
	Fuel injection shim thickness: GREAT
	Film cooling injection shim hole diameter: ACCEPTABLE
	Segmented pintle segmented length: GREAT
	Segmented pintle segmented width: GREAT
	Fuel injection plenums dimensions: GOOD
	Pintle plenum dimensions: GREAT

2: Validating tolerances on injector assembly:
	Fuel injection shim fuel hole tolerances: GOOD
	Fuel injection shim film cooling hole tolerances: ACCEPTABLE
	Fuel injection plate outer tolerances: GREAT
	Segmented pintle segment tolerances: GOOD
	Pintle tolerances to sliding section: ACCEPTABLE
	Pintle tolerances to plenum inner wall: BAD
	
3: Validate machined throat and combustion chamber:
	Throat dimension: GOOD * What I have documented is [REDACTED], but machined parts measure to be [REDACTED], which is actually mathematically correct.
	Chamber length: BAD * Expected to be [REDACTED], so we are [REDACTED] mm short
	Chamber width: ACCEPTABLE * Can be helped with changing length
	Nozzle length: GOOD
	Nozzle angle: ACCEPTABLE

4: Risk analysis:
	Key injector dimensions overall risk: LOW
	Injector tolerance overall risk: HIGH
	Mchined throat and combustion chamber risk: VERY HIGH

OVERALL VERDICT: REDESIGN NECCESSARY