{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:ZKGCN365ERRJ6UJOHPUCA6TK42","short_pith_number":"pith:ZKGCN365","schema_version":"1.0","canonical_sha256":"ca8c26efdd24629f512e3be8207a6ae6a5f7c1e3ebf768256bbc553eed10d3b5","source":{"kind":"arxiv","id":"1708.02922","version":1},"attestation_state":"computed","paper":{"title":"Towards Long-endurance Flight: Design and Implementation of a Variable-pitch Gasoline-engine Quadrotor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.RO","authors_text":"B. M. Chen, F. Lin, K. Peng, T. Pang","submitted_at":"2017-08-09T17:41:59Z","abstract_excerpt":"Majority of today's fixed-pitch, electric-power quadrotors have short flight endurance ($<$ 1 hour) which greatly limits their applications. This paper presents a design methodology for the construction of a long-endurance quadrotor using variable-pitch rotors and a gasoline-engine. The methodology consists of three aspects. Firstly, the rotor blades and gasoline engine are selected as a pair, so that sufficient lift can be comfortably provided by the engine. Secondly, drivetrain and airframe are designed. Major challenges include airframe vibration minimization and power transmission from one"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1708.02922","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.RO","submitted_at":"2017-08-09T17:41:59Z","cross_cats_sorted":[],"title_canon_sha256":"5537843d937904f105feacfc84794eb81e1e1908b80870748d48fd0bf42923bd","abstract_canon_sha256":"c5818e83b98d1e89710ed1a47339e1e0a4a4a1ec485149af27a263ff46d17897"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:38:19.078307Z","signature_b64":"QimgHlMH+uAMl+bt8CB1F8c2eXgzyMJ0fYRyxwLUf/nIpdjC5WPO86HrR8NRowAD9M+Dp0BC7BsE8y+cy+5cDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ca8c26efdd24629f512e3be8207a6ae6a5f7c1e3ebf768256bbc553eed10d3b5","last_reissued_at":"2026-05-18T00:38:19.077589Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:38:19.077589Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Towards Long-endurance Flight: Design and Implementation of a Variable-pitch Gasoline-engine Quadrotor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.RO","authors_text":"B. M. Chen, F. Lin, K. Peng, T. Pang","submitted_at":"2017-08-09T17:41:59Z","abstract_excerpt":"Majority of today's fixed-pitch, electric-power quadrotors have short flight endurance ($<$ 1 hour) which greatly limits their applications. This paper presents a design methodology for the construction of a long-endurance quadrotor using variable-pitch rotors and a gasoline-engine. The methodology consists of three aspects. Firstly, the rotor blades and gasoline engine are selected as a pair, so that sufficient lift can be comfortably provided by the engine. Secondly, drivetrain and airframe are designed. Major challenges include airframe vibration minimization and power transmission from one"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.02922","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1708.02922","created_at":"2026-05-18T00:38:19.077718+00:00"},{"alias_kind":"arxiv_version","alias_value":"1708.02922v1","created_at":"2026-05-18T00:38:19.077718+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.02922","created_at":"2026-05-18T00:38:19.077718+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZKGCN365ERRJ","created_at":"2026-05-18T12:31:59.375834+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZKGCN365ERRJ6UJO","created_at":"2026-05-18T12:31:59.375834+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZKGCN365","created_at":"2026-05-18T12:31:59.375834+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/ZKGCN365ERRJ6UJOHPUCA6TK42","json":"https://pith.science/pith/ZKGCN365ERRJ6UJOHPUCA6TK42.json","graph_json":"https://pith.science/api/pith-number/ZKGCN365ERRJ6UJOHPUCA6TK42/graph.json","events_json":"https://pith.science/api/pith-number/ZKGCN365ERRJ6UJOHPUCA6TK42/events.json","paper":"https://pith.science/paper/ZKGCN365"},"agent_actions":{"view_html":"https://pith.science/pith/ZKGCN365ERRJ6UJOHPUCA6TK42","download_json":"https://pith.science/pith/ZKGCN365ERRJ6UJOHPUCA6TK42.json","view_paper":"https://pith.science/paper/ZKGCN365","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1708.02922&json=true","fetch_graph":"https://pith.science/api/pith-number/ZKGCN365ERRJ6UJOHPUCA6TK42/graph.json","fetch_events":"https://pith.science/api/pith-number/ZKGCN365ERRJ6UJOHPUCA6TK42/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZKGCN365ERRJ6UJOHPUCA6TK42/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZKGCN365ERRJ6UJOHPUCA6TK42/action/storage_attestation","attest_author":"https://pith.science/pith/ZKGCN365ERRJ6UJOHPUCA6TK42/action/author_attestation","sign_citation":"https://pith.science/pith/ZKGCN365ERRJ6UJOHPUCA6TK42/action/citation_signature","submit_replication":"https://pith.science/pith/ZKGCN365ERRJ6UJOHPUCA6TK42/action/replication_record"}},"created_at":"2026-05-18T00:38:19.077718+00:00","updated_at":"2026-05-18T00:38:19.077718+00:00"}