HobbyKing.com New Products Flash Sale
Reply
Thread Tools
This thread is privately moderated by GooberSB, who may elect to delete unwanted replies.
Old Nov 24, 2011, 07:59 PM
An Ordinary User
United States, VA, Fluvanna
Joined Jan 2011
1,247 Posts
Discussion
48" KFm-4ward scratchbuild

I built a KFm-4ward on yesterday and just flew it today.

I put a ExceedRc Rocket motor on it with a 7x5 Master Airscrew prop and a 1800mah 3S lipo. This setup gives me over 200W at 20-25A. The motor can take 30A but max efficiency is only up to 18A. Balances nice and flies smooth on low rates. In this video I'm flying at 50% aileron and 60% elevator so it flares nicely at low speed landings as you can see at the end of the video. On high rates (100% throw) it will turn on a dime but I don't want that much throw when getting to know my planes.

It is a gentle giant on low rates and very maneuverable on high rates.

Here's a video of todays flight and some pictures

48" KFm-4ward (3 min 57 sec)


This is a nice flyby filmed Dec 17
KFm-4ward flyby (2 min 0 sec)
GooberSB is offline Find More Posts by GooberSB
Last edited by GooberSB; Dec 19, 2011 at 12:49 AM.
Reply With Quote
Sign up now
to remove ads between posts
Old Nov 25, 2011, 03:41 AM
Registered User
Joined Aug 2011
30 Posts
kfm

flys not to bad
bikerbobfoame is offline Find More Posts by bikerbobfoame
Reply With Quote
Reply

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Build Log KFm-4ward 48" wing ombudsman Flying Wings 93 Nov 24, 2012 10:09 PM
Discussion Experiments with KFm airfoil on 'Elf' DLG glider JetPlaneFlyer Foamies (Scratchbuilt) 118 Jun 30, 2012 11:46 PM
Discussion KFm airfoil 48" Flying Wing gatorlynch SPAD - Simple Plastic Airplane Designs 31 Jun 04, 2012 07:38 AM