Ratletrap or Rattletrap: How To spell?

The word Ratletrap is misspelled against Rattletrap, a noun meaning "Any machine or vehicle that does not run smoothly."

Rattletrap has double "tt" is mispronounced as "t"
Remember double 'TT' in between the strings ra & letrap which should not be misspelled with single 'T'
Wrong Spelling:  ra-t-letrap 
Correct Spelling:  ra-tt-letrap 
Explore spell check of Rattletrap to spell without errors.

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