Joe
The Jeti 110 is rated for 11 amps continuous and your current from two motors is going to exceed that.
A 6vSp400 on 7 cells with a gunther prop will draw around 8 amps at full throttle. For two motors in parallel you essentially double the current draw. If your two motors are in parallel (which given that you are using seven cells they are) then depending on the props and the exact model of Sp400 used you are likely to be drawing something in the order of 16 amps static on 7 cells. That will cause the ESC to cut off to protect itself before you reach that current draw.
For a twin in that configuration you would be better suited to use an ESC with plenty of headroom - I use a Jeti 350 in a twin 400 model, you might just get away with an 18 -20 amp controller, but having the excess capacity is a good idea. Something in the 25-35 amp rating range will be right IMHO.
Brian
-- Brian Cullen - (Leccyflyer) - Moderator
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