1.Introduction
1.1 The results of weighing and centre of gravity determination, checking to Appendix "A" Serial No. 1432, A.L's Nil, loading in accordance with Appendix 1 (Provisional laoding and C.G. diagram) to Chap. 1, Sect. 4, Vol. 1, of A.B.1565T and centre of gravity range, are included in this part of report.
1.2 This was the second production aircraft of this type.
2.Weight summary
2.1.| TARE (Including tail end & fixed ballast) | 6578 |
| Service load | 1023 |
| Fuel @ 7.2 lb/gall. | 806 |
| Oil @ 9.0 lb/gall. | 81 |
| Flying weight (lb) | 8488 |
2.2. In addition to the above load the following alternative items may be carried:
(b) 30 gallon vulcanized fibre drop tank.
(c) 30 gallon wood drop tank.
(d) 90 gallon tinned steel drop tank.
(e) 250 lb. G.P. or S.A.P. bomb.
(f) 500 lb. G.P., M.C. or S.A.P. bomb.
3. Maximum capacity of tanks.
| Fuel | Fuselage tank | 85 gallons |
|---|---|---|
| Wing tanks (2) | 27 gallons | |
| Total | 112 gallons | |
| Oil | Fuselage tank. | 9 gallons |
4. Centre of gravity
4.1. The centre of gravity with the aircraft loaded as stated in para. 2.1 measured relative to the datum point and parrallel to the datum line is 4.8" aft.
4.12. With the addition of the various alternative loads quoted in para. 2.2 the centre of gravity ranges from 4.8" aft to 5.5" aft.
4.21. Considering both normal and alternative loads the centre of gravity range due to dissipation of load is from 3.9" aft to 5.5" aft. The forward limit occurs on all loads when ammunition had been expended, bombs or drop tanks released and fuel consumed down to a supply sufficient for a half hour's running of the engine at maximum power permissible at grand level. The aft limit occurs when carrying the 90 gallon drop tank with the normal load.
4.22. The aft limit obtained when considering the normal load only is 5.1" aft when all fuel from the wing tanks has been consumed.
4.3. For purposes of test the aft limit quoted in para. 4.2 is extended by 1% S.M. chord which is equivalent to 0.8".
4.4. All C.G. positions are quoted undercarriage down. The normal effect due to retraction is 3600 lb/in. and moves the C.G. aft by 0.4" at the normal load.
4.5. The loading and C.G. diagram referred to in para. 1 quotes the following information in respect of weight and C.G.
Permissible C.G. range for all forms of flying...........from 3.5 inches to 6.5 inches aft of datum point."
4.6. For conversion of C.G. position in inches to percentage of S.M. chord see Appendix 1.
5. General
5.1. A comparison between A. & A.E.E. results and the provisional loading and C.G. diagram referred to in para. 1 follows:
| Result | TARE | C.G. |
|---|---|---|
| A. & A.E.E. | 6578 lb | 0.6" forward of datum |
| App. 1 (loading & C.G. diagram). | 6580 lb | 0.61" forward of datum |
5.2. In Appendix 1 the various loads are set out in detail.
Appendix 1.
| Loading Details | Weight lb | Lever ins | Moment lb/ins |
|---|---|---|---|
| As Tare weight & CG, including tail and fixed ballast to Drawing No.37927 Sheet 21 Issue 5. | 6578 | -0.63 | -4120 |
| Add: | |||
| Browning guns (4) | 112.5 | 11 | 1238 |
| Ammunition | 93 | 9.5 | 884 |
| Hispano guns (2) | 294 | -2 | -588 |
| Ammunition | 150 | 12 | 1800 |
| Reflector light | 4.5 | 40 | 180 |
| Clock and crowbar | 3 | 58 | 174 |
| Camera G.45 | 7 | -6 | -42 |
| Oxygen cylinder | 19.5 | 187 | 3647 |
| Dinghy Type K | 15 | 55 | 825 |
| First aid | 2.5 | 175.5 | 439 |
| Wireless: | |||
| TR.1143 | 86.5 | 136.5 | 11807 |
| R.3067 | 35 | 151.5 | 5302 |
| Pilot and parachute | 200 | 55 | 11000 |
| Fuel: | |||
| Fuselage tank 85 galls. @ 7.2 lb/gall. | 612 | 15.5 | 9486 |
| Wing tanks 27 galls. @ 7.2 lb/gall. | 194.5 | -9 | -1751 |
| Oil: 9 galls. @ 9.0 lb.gall. | 81 | 1 | 81 |
| Typical Service load weight & CG position, u/c down. | 8488 | 4.8 | 40404 |
| 30 gallon tinned steel drop tank load | Weight | Moment |
|---|---|---|
| As typical Service load | 8488 | 40404 |
| Add: | ||
| Tinned steel drop tank | 75 | 1200 |
| . | 8563 | 41604 |
| 30 galls of fuel | 216 | 3456 |
| . | 8779 | 45060 |
| CG position u/c down | 5.1" | |
| 30 gallon vulcanized fibre drop tank load | Weight | Moment |
| As typical Service load | 8488 | 40404 |
| Add: | ||
| Vulcanized fibre drop tank | 40 | 640 |
| 8528 | 41044 | |
| 30 galls of fuel | 216 | 3456 |
| 8744 | 44500 | |
| CG position u/c down | 5.1" | |
| 30 gallon wood drop tank load | Weight | Moment |
| As typical Service load | 8488 | 40404 |
| Add: | ||
| Wood steel drop tank | 58 | 928 |
| 8546 | 41332 | |
| 30 galls of fuel | 216 | 3456 |
| 8762 | 44788 | |
| CG position u/c down | 5.1" | |
| 90 gallon tinned steel drop tank load | Weight | Moment |
| As typical Service load | 8488 | 40404 |
| Add: | ||
| Tinned steel drop tank | 142 | 2272 |
| 8630 | 42676 | |
| 90 galls of fuel | 648 | 8748 |
| 9278 | 51424 | |
| CG position u/c down | 5.5" | |
| 250 lb GP or SAP bomb load | Weight | Moment |
| As typical Service load | 8488 | 40404 |
| Add: | ||
| Bomb carrier & adapter | 51 | 612 |
| 8539 | 41016 | |
| 250 lb GP or SAP bomb | 240 | 2880 |
| 8779 | 43896 | |
| CG position u/c down | 5.0" | |
| 500 lb GP bomb load | Weight | Moment |
| As typical Service load | 8488 | 40404 |
| Add: | . | |
| Bomb carrier & adapter | 51 | 612 |
| 8539 | 41016 | |
| 500 lb GP bomb | 420 | 5040 |
| 8959 | 46056 | |
| CG position u/c down | 5.14" | |
| 500 lb MC bomb load | Weight | Moment |
| As typical Service load | 8488 | 40404 |
| Add: | ||
| Bomb carrier & adapter | 51 | 612 |
| 8539 | 41016 | |
| 500 lb MC bomb | 440 | 5280 |
| 8979 | 46296 | |
| CG position u/c down | 5.16" | |
| 500 lb SAP bomb load | Weight | Moment |
| As typical Service load | 8488 | 40404 |
| Add: | ||
| Bomb carrier & adapter | 51 | 612 |
| 8539 | 41016 | |
| 500 lb GP bomb | 485 | 5820 |
| 9024 | 46836 | |
| CG position u/c down | 5.18" | |
