RCU Forums - View Single Post - Unofficial "NQD" Tear into Jetboat Thread
Old 11-17-2008, 11:25 PM
  #31  
headhunter23
Senior Member
 
Join Date: Aug 2007
Location: Waterloo, ON, CANADA
Posts: 1,173
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Unofficial "NQD" Tear into Jetboat Thread

You can use any servo you want, my buddy swears by the big heavy servo, me I go with a small light 5gram servo. For mount, just get a small piece of aluminum angle, notch out where servo sits.

http://www.rcuniverse.com/forum/m_65...tm.htm#7031632 for ultra light servo mount
http://www.rcuniverse.com/forum/m_65...2Cmount/tm.htm for heavier duty servo mount.

Have had really really good luck with this motor(3 boats), others have tried 3200-3600rpm/kv shoot for 30-40amps
http://www.unitedhobbies.com/UNITEDH...idProduct=4200
combo'd with this esc
http://www.unitedhobbies.com/UNITEDH...idProduct=6318
but requires programmer card
http://www.unitedhobbies.com/UNITEDH...idProduct=5448

haven't had luck on the turnigy esc though... although my motor could just be bad.

Ummmm... you'll want to sleve the shaft at some point or drill it out larger and add a bearing where the rubber grommet is, as the shaft sits in plastic protected by grease which doesn't last too long. (wasn't designed for high rpm).

With that motor I posted, on 7.4v it pulls 23 amps, on 11.1v it pulls 30 amps. Add cooling lines to the motor and one or two to the esc(merely by gooping in some aluminum tubing against cooling that's already there.

Other tips, when cutting top to get to the electronics out and replace, leave the posts! leave like a half inch around the top so you can add some foam or gasket to keep water out. Also the decorative engine tips need to be pulled off and siliconed or gooped. Ummm... very thin carbon fibre rods make great grills, just notch in the plastic then goop/epoxy. Uh... make sure you get all the glue out, it's heavy. You'll have to mess with cg once done, once you get cg right, boat works really really well and helps prevent loss of prime going up river.

That's about all i can think of... oh batt, you can go 4400mah with this setup perhaps more. Have tried both 11.1v and 7.4v with this amount of juice.

Ivan.