Westland Whirlwind
This is what it looks like (for those who don't know
https://www.bing.com/images/search?view=detailV2&ccid=XR5fVjo9&id=233E47A59C5DB8587F1CF9F7CAFF1E92F9EFAFF8&thid=OIP.XR5fVjo9x74MhpajwiUFNwHaFa&mediaurl=https%3a%2f%2fwww.militaryimages.net%2fmedia%2fwestland-whirlwind.16122%2ffull%3fd%3d1521491101&exph=658&expw=900&q=westland+whirlwind+URL&simid=608010422709322082&ck=2264197FF62CE78A04B8604F16F3CBF6&selectedIndex=0&FORM=IRPRST&ajaxhist=0
Basically its a baby Mosquito
It had Rolls-Roy