Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 19; Flight Crew Total 4191; Flight Crew Type 435
Communication Breakdown; Situational Awareness
Conflict NMAC; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action
Human Factors
We were preparing to depart Runway XX at ZZZ for a VFR flight to ZZZ1. After completing engine run-up; we advised via the CTAF that we were going to hold for the two aircraft that were inbound to Runway XX. The first aircraft was coming in from the north on a straight in approach. The second had been doing touch & go's and was currently on the downwind leg.   Because the first aircraft was on a long final (7+ miles) and was slow; we concluded that by the time he landed; the aircraft on the downwind would already be on the base to final leg so we decided to wait for both to land. The pilot flying announced this on the CTAF.When the second aircraft touched down on the runway and began to accelerate to take off again; (he was doing a touch & go) we announced that we were going to take position on the runway and hold momentarily to create some space as our airplane (Cessna 182) climbs quite a bit faster than the aircraft ahead (a Cessna 172).  Once the Cessna 172 was on the upwind leg; we began our takeoff roll. As soon as we started moving; a tandem seat taildragger flew right over us. He side stepped slightly to the right and began a go-around. He was no more than 10 feet above us with a lateral displacement of 15-20 feet. No radio transmissions were made by that aircraft at any time before; during or after this incident. The taildragger then got fairly close to the Cessna 172 ahead of it on the upwind leg and we observed it make a turn to the crosswind while remaining in the traffic pattern as we climbed out to the south on our way to ZZZ1.In addition to there being no radio calls from the aircraft; it also did not show as a traffic alert (visual or aural) on our ADS-B (Automatic Dependent Surveillance Broadcast) traffic system; which makes me wonder whether that aircraft was equipped with an ADS-B transmitter. As a point of reference; anytime I share the traffic pattern with other ADS-B equipped aircraft (as mandated by regulation within the 30 mile mode C veil); I always get visual and aural alerts to traffic close by.
C-182 pilot reported aircraft had a NMAC with another aircraft during takeoff roll.