RCU Forums - View Single Post - How much engine do scale twins really need?
Old 11-08-2005 | 02:56 PM
  #6  
Ed_Moorman's Avatar
Ed_Moorman
My Feedback: (1)
 
Joined: Jan 2002
Posts: 4,059
Likes: 0
Received 2 Likes on 2 Posts
From: Shalimar, FL
Default RE: How much engine do scale twins really need?

bash-ace has probly never heard the expression, "enough power to steer to the site of the crash."

A good flier and good engine man can fly with lower power. A good flier knows how to use rudder to hold the plane straight in the event of an engine out. If you read back thrugh this forum, you'll find several reports of people losing an engine and having the plane roll over and die. If you can't hold rudder in and at the same time adjust power, you need to get a sport twin that has good engine-out characteristics and learn to fly it, practicing engine out flying. Do this before you try a scale twin. It will save you a lot of grief.

I would also recommend a good powerful rudder servo and stiff controls. I prefer a digital servo on my twins. You also need to test your rudder linkage. Hold full rudder and try to straighten out your rudder. If you can, you need to fix the pushrods, linkages or change servos. Do this both directions. I've seen some scale planes that I could move the rudder back to neutral with 1 finger.

You also need to learn how to run engines for twins. It must be the dual vibration causing more fuel foaming or something, but an engine that may run well on a single can go sour on a twin. It is human nature to try to tweak a little more power out of your engine, especially if you are running smaller engines. On a twin, this is a single engine landing. Learn on a sport twin before trying a scale plane with little engines.

You guys can have your planes with undersized engines. Me, I want the biggest engines, big props that clear the cowl and a big digital rudder servo with pull-pull cables. I've been there and got the T-shirt.