The Type 171 Mk.4 was built with 4 doors, featured a 520shp Alvis Leonides 71 engine, a higher main undercarriage and the pilot sat on the right hand side of the cockpit. Most Sycamore production units were based on the Mk.4. 
Specifications Sycamore 4 |
List of Operators of Sycamore 4 |
| Years | Model | Org | |
|---|---|---|---|
| 1951/65 | Type 171 Sycamore |  Royal Australian Air Force | |
| 1953/66 | Type 171 Sycamore | Fleet Air Arm (RAN) | |
| 1953/72 | Type 171 Sycamore |  Royal Air Force | |
| 1979/85 | Type 171 Sycamore | Flambards Experience | |
| 2007- | Type 171 Sycamore | Boscombe Down Aviation Collection | |
| 2015- | Aerospace Bristol |
Global Distribution of Sycamore 4 |
|
Construction Numbers |
| C/N | Year | History | |
|---|---|---|---|
| 13070 | 1952 | G-AMWI,VH-BAW,XR592 | |
| 13071 | 1953 | XD653 | |
| 13144 w/o 1954 | 1952 | XE306 | |
| 13145 w/o 1959 | 1952 | XE307 | |
| 13146 w/o 1961 | 1953 | XD654 | |
| 13147 | 1953 | XD655 | |
| 13148 w/o 1957 | 1954 | XD656 | |
| 13149 w/o 1965 | 1953 | XE308 | |
| 13150 w/o 1963 | 1953 | XE309 | |
| 13151 | 1953 | XE310 | |
| 13152 w/o 1964 | 1953 | XE311 | |
| 13153 w/o 1957 | 1953 | XE312 | |
| 13194 w/o 1958 | 1953 | G-AMWK,XE313 | |
| 13195 | 1952 | G-AMWL,XE314 | |
| 13196 w/o 1955 | 1952 | G-AMWM,XE315 | |
| 13197 w/o 1955 | 1952 | G-AMWN,XE316 | |
| 13198 | 1952 | G-AMWO,XE317 | |
| 13202 | A91-2,G-AMWT | ||
| 13203 | 1955 | XG506 | |
| 13220 w/o 1955 | 1954 | XE318 | |
| 13221 w/o 1959 | 1954 | XE319 | |
| 13222 w/o 1965 | 1954 | XE320 | |
| 13223 w/o 1956 | 1954 | XE321 | |
| 13224 w/o 1961 | 1954 | XE322 | |
| 13225 w/o 1956 | 1954 | XF265 | |
| 13226 | 1954 | XF266 | |
| 13227 w/o 1959 | 1954 | XF267 | |
| 13228 w/o 1955 | 1955 | XF268 | |
| 13229 w/o 1966 | 1955 | XF269 | |
| 13240 w/o 1957 | 1955 | XJ363 | |
| 13242 | 1956 | XJ380 | |
| 13243 w/o 1957 | 1956 | XJ381 | |
| 13245 w/o 1961 | 1954 | XG500 | |
| 13246 w/o 1955 | 1955 | XG501 | |
| 13247 | 1955 | XG502 | |
| 13248 w/o 1958 | 1955 | XJ361 | |
| 13264 | 1955 | XG503 | |
| 13265 scrapped 1992 | 1955 | XG504 | |
| 13266 w/o 1956 | 1955 | XJ362 | |
| 13267 w/o 1956 | 1955 | XG505 | |
| 13268 w/o 1956 | 1955 | XG510 | |
| 13269 w/o 1962 | 1955 | XG509 | |
| 13271 w/o 1960 | 1955 | XG511 | |
| 13272 w/o 1963 | 1955 | XG512 | |
| 13273 w/o 1957 | 1955 | XG513 | |
| 13368 w/o 1964 | 1955 | XG514 | |
| 13369 | 1955 | XG515 | |
| 13370 w/o 1957 | 1955 | XG516 | |
| 13371 w/o 1963 | 1955 | XG517 | |
| 13372 | 1955 | XG518 | |
| 13373 w/o 1964 | 1955 | XG519 | |
| 13374 w/o 1960 | 1955 | XG520 | |
| 13375 w/o 1961 | 1955 | XG521 | |
| 13376 w/o 1961 | 1955 | XG522 | |
| 13377 w/o 1962 | 1955 | XG523 | |
| 13378 w/o 1960 | 1956 | XG538 | |
| 13379 w/o 1958 | 1956 | XG539 | |
| 13380 w/o 1965 | 1955 | XG540 | |
| 13381 w/o 1958 | 1956 | XG541 | |
| 13382 w/o 1958 | 1956 | XG542 | |
| 13383 w/o 1958 | 1956 | XG543 | |
| 13384 | 1956 | XG544 | |
| 13385 w/o 1957 | 1956 | XG545 | |
| 13386 w/o 1957 | 1956 | XG546 | |
| 13387 | 1956 | G-HAPR,XG547 | |
| 13388 w/o 1957 | 1956 | XG548 | |
| 13389 w/o 1958 | 1956 | XG549 | |
| 13390 w/o 1957 | 1956 | XJ383 | |
| 13392 | XJ385 | ||
| 13402 w/o 1964 | 1956 | XG507 | |
| 13404 scrapped 1978 | 1956 | XJ895 | |
| 13405 w/o 1958 | 1956 | XJ896 | |
| 13406 | 1956 | XJ897 | |
| 13408 | 1956 | XJ898 | |
| 13409 w/o 1966 | 1956 | XJ915 | |
| 13410 | 1956 | XJ916 | |
| 13412 | 1956 | XJ917 | |
| 13413 | 1956 | XJ918 | |
| 13414 w/o 1963 | 1957 | XJ919 | |
| 13415 w/o 1964 | 1957 | XL820 | |
| 13417 scrapped 1968 | 1957 | XL821 | |
| 13438 w/o 1963 | 1957 | XL822 | |
| 13441 scrapped 1976 | 1957 | XL823 | |
| 13444 | 1957 | 8021M,XL824 | |
| 13447 w/o 1962 | 1957 | XL825 | |
| 13460 w/o 1966 | 1957 | XL826 | |
| 13468 | 1957 | XL827 | |
| 13471 w/o 1959 | 1957 | XL828 | |
| 13474 | 1957 | XL829 | |
| 13504 w/o 1962 | 1959 | XN449 | |
| 13505 | 1958 | XN450 |
