{"schema_version":1,"research_id":"eoa_inverse_innovation_exp06_external_evaluation_20260803","source_assessment_id":"catalytic_pathway_enablement__aviation_aeronautics:P3:v0","cell_id":"catalytic_pathway_enablement__aviation_aeronautics","search_queries":["site:nasa.gov wind tunnel boundary layer transition grit roughness model testing transition strip","boundary layer transition trip dots removable insert cassette wind tunnel roughness array","FAA wind tunnel testing boundary layer transition trip roughness guidance","AIAA wind tunnel boundary layer transition trip dots roughness criteria","NASA wind tunnel model safety requirements loose parts transition grit retained model insert","wind tunnel model systems criteria handbook debris model safety NASA","roughness insert cone removable insert boundary layer transition device rod insertion method","commercial trip dots wind tunnel transition dots product","site:ntrs.nasa.gov 20160010156 Hybrid Wing Body trip dots low speed testing","\"Development of New Roughness Inserts\" Rod Insertion Method roughness insert cone","\"Boundary layer transition induced by roughness arrays over NACA 0012 airfoil\"","site:onera.fr windtunnel transition tripping visualization dots strip","CadCut trip dots wind tunnel product manufacturer transition dots","transition trip dots wind tunnel adhesive strip product 1.27 mm 2.54 mm","boundary layer trip dots commercial product wind tunnel","wind tunnel transition strip supplier trip dots CADCUT","US20180283983 remotely controlled boundary layer transition devices Boeing Google Patents","Boeing removable boundary layer transition cassette wind tunnel model patent trip dots","patent removable roughness insert wind tunnel boundary layer transition"],"sources":[{"source_id":"S1","title":"Use of grit-type boundary-layer transition trips on wind-tunnel models","publisher":"NASA Technical Reports Server","url":"https://ntrs.nasa.gov/search.jsp?R=19660026829","source_class":"PRIMARY_RESEARCH","publication_date":"1966-09-01","accessed_at":"2026-08-03","claims_supported":["Forced roughness transition on wind-tunnel models is a longstanding engineering practice.","Trip design must account for roughness size, position, Reynolds number and unwanted grit drag.","The underlying transition-control problem and conventional grit comparator predate this proposal by decades."]},{"source_id":"S2","title":"Transition tripping and visualization","publisher":"ONERA","url":"https://www.onera.fr/en/windtunnel/transition-tripping-and-visualization","source_class":"OFFICIAL_PRODUCT_DOCUMENTATION","publication_date":"n.d.","accessed_at":"2026-08-03","claims_supported":["Subscale wind-tunnel Reynolds-number limits can leave model boundary layers laminar when full-scale flow is expected to be turbulent.","ONERA routinely uses carborundum and commercial adhesive Cadcut trip dots to force transition.","Cadcut is valued for simple, fast and consistent application and monitoring of degradation.","Infrared and acenaphthene methods are mature transition-verification techniques available in ONERA tunnels."]},{"source_id":"S3","title":"An Application of CFD to Guide Forced Boundary-Layer Transition for Low-Speed Tests of a Hybrid Wing-Body Configuration","publisher":"NASA Technical Reports Server","url":"https://ntrs.nasa.gov/search.jsp?R=20160010156","source_class":"PRIMARY_RESEARCH","publication_date":"2016-06-13","accessed_at":"2026-08-03","claims_supported":["NASA developed and experimentally verified a trip-dot sizing and placement method for a subscale hybrid-wing-body test.","Infrared thermography verified trip-strip effectiveness in a low-speed wind tunnel.","Trip selection is configuration-dependent but the workflow may transfer to other configurations.","NASA Langley and Ames researchers constitute identifiable technical users of forced-transition methods."]},{"source_id":"S4","title":"A new roughness array for controlling the nonlinear breakdown of second-mode waves at Mach 6","publisher":"Purdue University Research Repository","url":"https://docs.lib.purdue.edu/dissertations/AAI1602634/","source_class":"PRIMARY_RESEARCH","publication_date":"2015","accessed_at":"2026-08-03","claims_supported":["A Roughness Insert Cone with removable, controlled roughness inserts was fabricated and tested before this proposal.","The Rod Insertion Method used arrays of dimensioned brass rods and allowed different roughness heights.","The inserts altered boundary-layer behavior, demonstrating feasibility of retained micro-roughness on a removable model interface.","Those particular inserts did not act as transition trips, so their exact aerodynamic purpose differs while their hardware topology closely overlaps."]},{"source_id":"S5","title":"NASA-STD-8719.28 Wind Tunnel Model Systems Criteria","publisher":"NASA Technical Standards System","url":"https://standards.nasa.gov/standard/NASA/NASA-STD-871928","source_class":"STANDARD","publication_date":"2022-10-31","accessed_at":"2026-08-03","claims_supported":["NASA requires design, analysis, quality-assurance and documentation criteria for model systems tested at specified wind-tunnel facilities.","The standard is intended to prevent model-system failure and facility damage.","A cassette cannot be deployed at a NASA facility solely on the aerodynamicist's authority; model-system and facility safety authorization are required."]},{"source_id":"S6","title":"Infrared Images of Boundary Layer Transition on the D8 Transport Configuration in the LaRC 14- by 22-Foot Subsonic Tunnel","publisher":"NASA Technical Reports Server","url":"https://ntrs.nasa.gov/citations/20160006476","source_class":"PRIMARY_RESEARCH","publication_date":"2015-08-04","accessed_at":"2026-08-03","claims_supported":["Grit, trip tape and trip dots are routinely used on wind-tunnel models to force laminar-to-turbulent transition.","A trip sized for nominal conditions may fail to produce the intended transition at other flow conditions.","Infrared imaging can non-intrusively locate transition and also reveal other flow features.","The evidence supports an operating-envelope requirement and direct verification rather than assuming a visibly installed trip remains effective."]},{"source_id":"S7","title":"Tripping device effects on the turbulent boundary layer development","publisher":"University of Twente Research Information / AIAA","url":"https://research.utwente.nl/en/publications/tripping-device-effects-on-the-turbulent-boundary-layedevelopment/","source_class":"PRIMARY_RESEARCH","publication_date":"2022-06-20","accessed_at":"2026-08-03","claims_supported":["Wind-tunnel experiments confirm that trip height strongly changes transition and the downstream turbulent boundary layer.","Tripping devices can alter boundary-layer thickness, shape factor and velocity spectra.","The role of trip geometry and its downstream effects remains incompletely understood.","A useful assay must measure downstream flow quality, not transition occurrence alone."]},{"source_id":"S8","title":"Remotely Controlled Methods and Systems for Actuating Boundary Layer Transition Devices in a Wind Tunnel Model","publisher":"Justia Patents, reproducing Boeing US patent application 20180283983","url":"https://patents.justia.com/patent/20180283983","source_class":"AUTHORITATIVE_SECONDARY","publication_date":"2018-10-04","accessed_at":"2026-08-03","claims_supported":["Boeing disclosed model-mounted arrays of reusable trip dots with remotely variable elevations, including a flush state.","The disclosed system collects comparative wind-tunnel data at multiple trip-dot states and can selectively actuate array subsets.","The stated need includes avoiding tunnel downtime, purging, contamination and manual trip replacement.","This is close prior art for reusable, retained, reconfigurable transition hardware, although it is active rather than a passive removable cassette."]}],"problem_evidence":{"support":"STRONG","rationale":"NASA and ONERA sources directly document the scale/Reynolds-number mismatch, routine need to force transition, condition-dependent trip effectiveness and importance of verifying transition. Experimental evidence also shows that trip geometry can materially alter downstream boundary-layer properties, so the problem matters for test validity rather than merely operational convenience.","source_ids":["S1","S2","S3","S6","S7"]},"stakeholder_evidence":{"support":"STRONG","rationale":"ONERA reports routine operational use of transition trips, and NASA Langley/Ames teams used and verified trip dots in named model campaigns. NASA-STD-8719.28 identifies the facility/model-safety authorization framework. These are credible adopters and authorizers, although no source expresses demand specifically for a passive removable cassette with the proposed regeneration protocol.","source_ids":["S2","S3","S5","S6"]},"prior_art":{"proximity":"SUBSTANTIAL_COLLISION","closest_analogues":[{"name":"Routine carborundum and Cadcut transition trips","similarity":"They impose calibrated surface roughness to force a turbulent boundary layer in subscale wind-tunnel tests and are routinely paired with transition visualization.","remaining_difference":"They are adhesive or particle treatments rather than a positively retained removable insert with dimensional inspection and a demonstrated cleaning/requalification cycle.","source_ids":["S1","S2","S6"]},{"name":"NASA hybrid-wing-body trip-dot workflow","similarity":"It sizes and positions regular trip-dot arrays, applies them consistently, and verifies transition experimentally using infrared thermography.","remaining_difference":"The published implementation uses applied trip strips rather than a separable cassette and does not report cassette-level turnover or regeneration.","source_ids":["S3"]},{"name":"Purdue Roughness Insert Cone and RIM inserts","similarity":"It uses removable model inserts carrying controlled, retained arrays of dimensioned roughness elements and tests their boundary-layer effect.","remaining_difference":"The inserts were designed to interact with hypersonic second-mode waves and did not trip transition; the proposal instead claims repeatable attached-turbulent transition plus restoration after contamination or wear.","source_ids":["S4"]},{"name":"Boeing remotely actuated transition trip-dot array","similarity":"It retains reusable trip dots within a wind-tunnel model, supports flush and raised states, permits array reconfiguration, and generates comparative datasets without manual replacement.","remaining_difference":"It is an active, remotely actuated cryogenic-compatible system rather than a passive removable cassette with offline cleaning and requalification.","source_ids":["S8"]}],"distinctive_claim_remaining":"For a specified non-flight model and operating envelope, a passive, positively retained removable roughness cassette can deliver lower configuration labor and at least equivalent transition-window repeatability and downstream-flow fidelity to routine Cadcut or grit, while recovering predeclared aerodynamic activity and dimensional tolerances after a standardized benign-fouling and cleaning cycle across repeated exposures. This narrow claim is contrastive and falsifiable; reuse, removable inserts and retained trip arrays themselves are not distinctive.","confidence":"HIGH"},"implementation_evidence":{"support":"MODERATE","rationale":"Controlled retained roughness inserts have been fabricated and tested, regular trip arrays routinely force transition, and infrared/hot-wire diagnostics can verify location and downstream effects. The main unresolved technical evidence is whether this specific passive cassette produces attached, spanwise-complete transition throughout its claimed envelope and remains structurally intact and aerodynamically recoverable after cleaning. Workflow and authority are feasible under facility model-safety review; no flight installation is contemplated. The dominant safety issues are retention, shedding, vibration, separation, model damage and misleading data provenance.","source_ids":["S3","S4","S5","S6","S7","S8"]},"scores":{"meaningful_impact":{"score":3,"rationale":"Successful control could improve the validity and repeatability of selected subscale aerodynamic tests and reduce reconfiguration burden, but the benefit is limited to tests needing prescribed turbulent boundary conditions and has not been quantified.","source_ids":["S2","S3","S6"]},"stakeholder_pull":{"score":4,"rationale":"Named NASA and ONERA facilities visibly use and verify transition trips, establishing strong need for the function; cassette-specific demand remains unverified.","source_ids":["S2","S3","S6"]},"incremental_advantage":{"score":2,"rationale":"Positive retention, separability and measured restoration could improve configuration control, but routine Cadcut already provides speed, consistency and degradation monitoring, while active retained trip arrays offer greater reconfigurability.","source_ids":["S2","S8"]},"distinctiveness_plausibility":{"score":1,"rationale":"Removable roughness inserts, retained arrays and reusable model-mounted trip dots are already disclosed. Only the specific passive-cassette regeneration and comparative performance package remains distinguishable.","source_ids":["S4","S8"]},"technical_implementability":{"score":4,"rationale":"Fabrication, mounting and diagnostics are supported by prior implementations, though transition efficacy and cleaning durability remain geometry- and condition-specific empirical questions.","source_ids":["S3","S4","S6","S7"]},"adoption_authority_feasibility":{"score":4,"rationale":"A non-flight probe has a clear facility/model-safety authorization route, but compliance evidence and facility approval are mandatory.","source_ids":["S5"]},"evidence_readiness":{"score":3,"rationale":"Strong prior evidence supports the problem, conventional comparators and measurement methods; no direct evidence supports the proposed cassette's multi-cycle regeneration claim.","source_ids":["S1","S2","S3","S4","S6","S7"]},"safety_net_benefit":{"score":4,"rationale":"A removable cassette permits reversion to a smooth insert, quarantine after anomalies and bounded low-energy testing, provided retention and model-system safety requirements are satisfied.","source_ids":["S5"]},"scalability":{"score":2,"rationale":"Cassette fabrication can be repeated, but transition behavior depends on geometry, pressure gradient, Reynolds number, Mach number and disturbance environment, forcing substantial revalidation across models and facilities.","source_ids":["S3","S6","S7"]}},"score_confidence":"MODERATE","costs":{"first_evidence":{"band_2026_usd":"50K_TO_250K","scope":"Design and fabricate one generic wing-section model, one smooth insert and three passive cassettes; complete safety review, metrology and a bounded low-energy campaign with approximately 30 active exposures, interleaved smooth and conventional-trip controls, one benign-fouling challenge and one regeneration cycle per cassette.","confidence":"LOW","assumptions":["An existing low-speed tunnel, balance/pressure system and transition diagnostics are available rather than purchased.","Costs include engineering, model fabrication, tunnel occupancy, instrumentation labor, analysis and documentation.","The campaign does not include cryogenic, transonic, flight-qualified or irreplaceable hardware.","No public facility rate card or supplier quotation was found in the eight-source set."],"source_ids":["S3","S4","S5","S6"]},"initial_deployment_startup":{"band_2026_usd":"250K_TO_1M","scope":"Engineer and validate a cassette interface, retention analysis, dimensional-inspection fixture, configuration-control records, cleaning/requalification procedure and cassette inventory for one model family and one facility envelope.","confidence":"LOW","assumptions":["Includes roughly one to four staff-years of multidisciplinary engineering and QA plus additional tunnel validation.","Excludes construction of a tunnel and excludes broad cross-facility qualification.","Facility-specific compliance with model-system safety criteria is required."],"source_ids":["S4","S5","S8"]},"operational_launch":{"band_2026_usd":"250K_TO_1M","scope":"Launch the method in one consequential wind-tunnel campaign, including campaign-specific CFD or boundary-layer sizing, multiple cassette variants, safety documentation, spares, installation tooling, diagnostics, training and contingency tunnel time.","confidence":"LOW","assumptions":["Existing facility infrastructure and trained operators are available.","The campaign requires multiple geometry/condition checks because a nominal trip may fail away from its design point.","Tunnel downtime and schedule value can dominate hardware cost, but no rate quotation was available."],"source_ids":["S3","S5","S6","S8"]},"annual_recurring":{"band_2026_usd":"50K_TO_250K","scope":"Maintain one facility's cassette inventory through inspection, cleaning, metrology, reference assays, replacement fabrication, configuration records, staff training and limited annual tunnel requalification.","confidence":"LOW","assumptions":["One facility and a small number of model families are supported.","Major new model development and full wind-tunnel campaigns are excluded.","Recurring burden depends strongly on exposure, contamination, tunnel rates and retirement frequency, none of which is externally measured."],"source_ids":["S2","S5","S6"]}},"verified_pipeline_gates":{"externally_supported_problem":{"status":"YES","reason":"Multiple official and primary sources directly document the subscale transition mismatch, routine forced-transition practice and condition-dependent failure risk.","source_ids":["S1","S2","S3","S6","S7"]},"externally_credible_adopter_or_authorizer":{"status":"YES","reason":"NASA Langley/Ames and ONERA are identifiable operational users; NASA facility and model-safety personnel operate under a published authorization standard.","source_ids":["S2","S3","S5","S6"]},"distinct_testable_incremental_claim":{"status":"YES","reason":"The remaining claim is narrowly testable as passive-cassette labor/repeatability/fidelity versus smooth and conventional-trip controls, including recovery after standardized fouling and cleaning.","source_ids":["S2","S4","S8"]},"bounded_next_evidence_step":{"status":"YES","reason":"A low-energy, non-flight campaign with three specimens, limited exposures, two conditions, concurrent controls, one fouling challenge and predeclared halt/falsification criteria is bounded and reversible.","source_ids":["S3","S5","S6","S7"]},"no_unresolved_safety_or_authority_stop":{"status":"YES","reason":"No categorical stop was found for non-flight testing. Retention, structural integrity, QA, documentation and facility approval remain mandatory conditions, with smooth-insert rollback available.","source_ids":["S5"]},"credible_cost_scope_and_range":{"status":"UNCERTAIN","reason":"Resource scopes and broad engineering bands can be bounded, but no tunnel rate card, fabrication quotation, labor estimate or maintenance history was available in the permitted eight-source evidence set.","source_ids":["S4","S5","S8"]}},"next_evidence_step":"With written facility-manager and model-owner authorization, run a preregistered low-energy test on one generic instrumented wing section using three independently fabricated cassettes. At each of two fixed flow conditions, randomize or alternate a dimensionally matched smooth insert, the facility's routine Cadcut or grit method, and each cassette, with no more than ten active exposures per cassette. Freeze transition-window, spanwise-coverage, attachment, downstream pressure/drag/noise, vibration, particle-retention, dimensional-tolerance and labor-time criteria before testing. Apply one approved benign contaminant to each cassette, perform the specified cleaning and metrology cycle, and repeat the reference assay. Falsify the incremental claim if the cassette does not outperform the conventional trip on predeclared configuration labor while remaining non-inferior on transition-window success and downstream effects; if any specimen sheds, moves, causes prohibited separation or fails dimensional or aerodynamic recovery; or if smooth controls already satisfy the target condition repeatably. Do not extrapolate beyond the tested model, Reynolds/Mach range or pressure-gradient envelope.","blocking_evidence":["No live evidence shows that the proposed cassette places transition inside the target window while preserving attachment and bounded downstream disturbance.","No specimen-level evidence demonstrates recovered geometry and aerodynamic activity after fouling, cleaning and repeated exposure.","No adopter has expressed a need specifically for the passive removable cassette over routine Cadcut, grit or active retained trip systems.","No facility quotation, fabrication quotation, measured setup-time baseline or maintenance history supports the cost bands.","Cross-geometry and cross-facility transferability is unsupported and likely requires separate validation.","World novelty, patentability, freedom to operate, market size and realized impact remain unmeasured."],"research_disposition":"PILOT_OR_ADOPTION_INQUIRY","world_novelty_boundary":"The search establishes longstanding forced-transition practice, routine commercial adhesive trip dots, removable controlled-roughness inserts and patented reusable model-mounted trip-dot arrays. It does not establish world novelty, patentability or freedom to operate. Any remaining novelty claim must be limited to the exact passive cassette interface, retention, regeneration/requalification protocol and demonstrated comparative operating envelope—not to roughness-induced transition, removable inserts, retained arrays or reusable trip devices generally.","arm":"COMPLETE_PROPOSAL_PORTFOLIO","candidate_version":0,"controller_recommendation":{"action":"STOP_EMPIRICAL_RESEARCH_NEEDED","repairable":false,"material_progress_observed":true,"progress_targets":["Obtain written authorization from a participating tunnel facility and model owner for the bounded non-flight probe.","Pre-register quantitative transition, attachment, downstream-disturbance, structural-integrity, labor and recovery criteria before any active run.","Complete randomized smooth-insert, routine-trip and three-cassette comparisons at two fixed conditions.","Demonstrate or falsify dimensional and aerodynamic recovery after one standardized benign-fouling and cleaning cycle per specimen.","Collect actual fabrication, tunnel-time, engineering-labor and maintenance costs to replace the low-confidence resource bands.","Document the narrow contrast from Purdue removable roughness inserts and Boeing retained adjustable trip arrays without asserting world novelty or freedom to operate."],"reason":"Open-web evidence strongly verifies the problem and shows substantial prior-art collision. The only meaningful remaining claim concerns comparative repeatability, labor, downstream fidelity and post-cleaning recovery of this exact passive cassette. Those questions require proprietary facility coordination and live wind-tunnel testing and cannot be resolved by additional bounded web research."},"proposal_index":3}