Flash2001
1: How loud was the sonic boom on the ground on track and at cruise?
Ever so quiet!
You could hardly hear it at all!
The intensity of the boom depended on many factors. If you’ve ever been on a boat when she passed right overhead, at around 32,000 ft, shortly after starting to accelerate, then that was probably as loud as it got. I haven’t, and have heard varied reports from those who have.
I have been on a boat when she has passed not to far from overhead, around 57,000 ft shortly before decelerating, most of the passengers thought it was the dull rumble of distant thunder.
2: How far either side of track could it be heard under average conditions?
35 miles away was reckoned to be boom free.
In supersonic flight Concorde trails a sonic boom behind her throughout her flight, and the rough dimensions of this boom carpet are 20nm wide (10nm either side of track) by about 15nm long, and extending all the way down to the ground.
3: At what points in altitude and distance travelled did it normally pass through mach 1?
At transatlantic weight, she would climb at her VMO of 400 kts IAS, and would therefore reach M1.0 climbing through 28,500 ft. The distance down range could vary considerably, but at best would at least 70 nm out of BGI, and could be considerably more out of LHR and JFK.
4: During what parts of the flight regime was reheat used?
From start of take-off roll to end of noise abatement, typically 80 seconds, and again during the transonic acceleration, from M0.93 to M1.70, typically 10 minutes.
5: In a normal trans Atlantic trip, how much of its fuel had it consumed to get to cruising altitude?
Around 40% of the trip fuel will be used in the first hour of flight.
fritzi
Concorde cant be less than Mach 1 at 45,00 feet if you want to fly efficiantly.
Correct, in fact Concorde cannot fly subsonic at 45,000 ft, period.
Whispering Giant
Mach1 had to be reached or passed by 100miles off the coast
The speed control points were not quite as restrictive as that.
On departure from the UK, the acceleration commenced at UPGAS, a position in the Bristol Channel only about 7 miles from Porthcawl, with the aircraft being supersonic fairly quickly thereafter.
On arrival into the UK, in Summer, the speed limit point was only about 35 miles from the Devon coast (Hartland Point), although it did move further out in Winter.
Regards to all
Bellerophon