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HL-10 Flight Chronology: 1966 - 1970

In the table, the flight number stands for: free flight number-B-52 carry number.

No. Date Flight No. Pilot Max. Altitude
(ft-m)		 Max. Speed
(mach-mph-kph)		 Flight Time (sec) Remarks
15 22 Dec. 1966 1-3 Peterson 45,000-13,720 .69-457-735 187 First flight.
18 15 Mar. 1968 2-5 Gentry 45,000-13,720 .61-425-684 243
19 3 Apr. 1968 3-6 Gentry 45,000-13,720 .69-455-732 242
20 25 Apr. 1968 4-8 Gentry 45,000-13,720 .69-459-739 258
21 3 May 1968 5-9 Gentry 45,000-13,720 .69-455-732 245
22 16 May 1968 6-10 Gentry 45,000-13,720 .68-447-719 265
23 28 May 1968 7-11 Manke 45,000-13,720 .66-434-698 245
24 11 Jun. 1968 8-12 Manke 45,000-13,720 .64-433-697 246
25 21 Jun 1968 9-13 Gentry 45,000-13,720 .64-423-681 271
26 24 Sept. 1968 10-17 Gentry 45,000-13,720 .68-449-722 245 XLR-11 engine installed.
27 3 Oct. 1968 11-18 Manke 45,000-13,720 .71-471-758 243
28 23 Oct. 1968 12-20 Gentry 39,700-12,100 .67-449-722 189 First powered flight. Premature shutdown
29 13 Nov. 1968 13-21 Manke 42,650-13,000 .84-524-843 385 2 chambers, 186-sec powered flight.
30 9 Dec. 1968 14-24 Gentry 47,420-14,450 .87-542-872 394 2 chambers.
32 17 Apr. 1969 15-27 Manke 52,740-16,070 .99-605-973 400 3 chambers.
33 25 Apr. 1969 16-28 Dana 45,000-13,720 .70-462-743 252 Glide.
35 9 May 1969 17-29 Manke 53,300-16,250 1.13-744-1197 410 3 chambers, first supersonic.
36 20 May 1969 18-30 Dana 49,100-14,970 .90-596-959 414
37 28 May 1969 19-31 Manke 62,200-18,960 1.24-815-1311 398 2 chambers.
38 6 June 1969 20-32 Hoag 45,000-13,720 .67-452-727 231 Glide.
39 19 June 1969 21-33 Manke 64,100-19,540 1.40-922-1483 378 2 chambers.
40 23 June 1969 22-34 Dana 63,800-19,450 1.27-839-1350 373 2 chambers.
41 6 Aug. 1969 23-35 Manke 76,100-23,190 1.54-1020-1641 372 First 4-chambered flight.
43 3 Sept. 1969 24-37 Dana 77,960-23,760 1.45-958-1541 414 4 chambers.
45 18 Sept. 1969 25-39 Manke 79,190-24,140 1.26-833-1340 426 4 chambers.
47 30 Sept. 1969 26-40 Hoag 53,750-16,380 .92-609-780 436 2 chambers.
49 27 Oct. 1969 27-41 Dana 60,610-18,470 1.58-1041-1675 417
50 3 Nov. 1969 28-42 Hoag 64,120-19,540 1.40-921-1482 439
52 17 Nov. 1969 29-43 Dana 64,590-19,690 1.59-1052-1693 408
53 21 Nov. 1969 30-44 Hoag 79,280-24,160 1.43-952-1532 378
55 12 Dec. 1969 31-46 Dana 79,960-24,370 1.31-871-1401 428
56 19 Jan. 1970 32-47 Hoag 86,660-26,410 1.31-869-1398 410
57 26 Jan. 1970 33-48 Dana 87,684-26,730 1.35-897-1443 411
58 18 Feb. 1970 34-49 Hoag 67,310-20,520 1.86-1228-1976 380 Max. speed.
60 27 Feb. 1970 35-51 Dana 90,303-27,524 1.31-870-1400 416 Max. altitude.
66 11 June 1970 36-52 Hoag 45,000-13,716 .74-503-809 202 Glide landing study.
68 17 Jul. 1970 37-53 Hoag 45,000-13,716 .73-499-803 252

Source: DFRC fact sheet, March 1976.

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