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Speed,Combat,Scale,Racing => Combat => Topic started by: Tim Chenevert on March 17, 2018, 01:24:48 PM

Title: Sneeker CG question
Post by: Tim Chenevert on March 17, 2018, 01:24:48 PM

I am almost finished building my Sneeker and have a question on the center of gravity location. It is not covered yet but with engine installed the CG is is 1 3/8” from the LE. The CG location is 1 7/8” from the LE. Is this acceptable or should I add weight to rear to get it closer? Thanks, Tim

Title: Re: Sneeker CG question
Post by: Brad LaPointe on March 17, 2018, 03:26:37 PM

I would leave it nose heavy. At first . Combat planes tend to become more sensitive the slower they fly .

If the first flight is wings flat and real sluggish to control add tail weight until you are comfortable. The faster you go the more tail weight you need. A combat plane that grooves at 110 will be tail heavy at 75 .

Brad

Title: Re: Sneeker CG question
Post by: Tom Luciano on March 17, 2018, 08:21:41 PM

Tim,
  Keep in mind that 70% of your covering and finish is aft of the CG. Your cg is going to move back after you cover it.
Good Luck!
Tom

Title: Re: Sneeker CG question
Post by: Tim Chenevert on March 17, 2018, 08:45:57 PM

Thanks for the replies! I did forget about the weight of the paint/covering. Tim