logo
Thread Tools
Old 03-17-2018, 09:32 PM
karolh is offline
Find More Posts by karolh
Registered User
Mandeville, Jamaica, West Indies
Joined Aug 2007
618 Posts
Discussion
I keep breaking props

I have a Dura Fly EF Xtra foam model which is a very nice flier but no matter how hard I try I just keep breaking the props on landing at my grass field. I am fairly new to flying electric foam models and would like to know if there is some special method used in attaching the prop so as to have it stop in a horizontal position when the power is cut and the motor stops turning. Any suggestions or advice in assisting in overcoming this problem is appreciated.
karolh is offline Find More Posts by karolh
Reply With Quote Quick reply to this message
Sign up now
to remove ads between posts
Old 03-17-2018, 09:39 PM
Keith Cannon is offline
Find More Posts by Keith Cannon
Only Amateurs Measure First
Keith Cannon's Avatar
United States, CO, Parker
Joined Apr 2016
1,389 Posts
https://www.towerhobbies.com/cgi-bin...xoCJWcQAvD_BwE


Those work pretty well. Sometimes a PITA to put a prop on. Are you stopping your motor before you touch the ground?
Keith Cannon is offline Find More Posts by Keith Cannon
Reply With Quote Quick reply to this message
Old 03-17-2018, 10:26 PM
Jatrizzy is offline
Find More Posts by Jatrizzy
Registered User
United States, TN, Sparta
Joined Jul 2011
1,224 Posts
You got a motor brake setup in your esc or does prop free wheel when power is cut?
Jatrizzy is offline Find More Posts by Jatrizzy
Reply With Quote Quick reply to this message
Old 03-18-2018, 08:55 AM
karolh is offline
Find More Posts by karolh
Registered User
Mandeville, Jamaica, West Indies
Joined Aug 2007
618 Posts
1. I always land with the power turned off.

2. My setup uses a motor brake but even with the power off the wind effect on the prop while gliding in to land makes it spin and that causes the prop strikes.
karolh is offline Find More Posts by karolh
Reply With Quote Quick reply to this message
Old 03-18-2018, 12:09 PM
Bunky F. Knuckle is offline
Find More Posts by Bunky F. Knuckle
Just your Average Joe.
Bunky F. Knuckle's Avatar
Joined Jan 2006
8,487 Posts
Possibly too tall of grass field??

There is no way possible to make a 3ph motor stop with the prop in the horizontal position.
Bunky F. Knuckle is offline Find More Posts by Bunky F. Knuckle
Reply With Quote Quick reply to this message
Old 03-18-2018, 12:56 PM
rooman is online now
Find More Posts by rooman
They're get'n lower mate.....
rooman's Avatar
United States, PA, Home
Joined Nov 2006
3,122 Posts
Quote:
Originally Posted by Bunky F. Knuckle View Post
Possibly too tall of grass field??

There is no way possible to make a 3ph motor stop with the prop in the horizontal position.
There is .....but....not on a our tiny motors
rooman is online now Find More Posts by rooman
Reply With Quote Quick reply to this message
Old 03-18-2018, 08:38 PM
Cryhavoc38 is offline
Find More Posts by Cryhavoc38
Living the dream
Cryhavoc38's Avatar
United States, WA, Woodinville
Joined Oct 2007
6,508 Posts
Can I suggest that when you land, that you pop the nose at the last second so that you just plop onto the grass? That way you have zero airspeed and since the motor is already shut off, the prop cannot break
Cryhavoc38 is offline Find More Posts by Cryhavoc38
Reply With Quote Quick reply to this message
Old 03-19-2018, 07:37 AM
karolh is offline
Find More Posts by karolh
Registered User
Mandeville, Jamaica, West Indies
Joined Aug 2007
618 Posts
Quote:
Originally Posted by Cryhavoc38 View Post
Can I suggest that when you land, that you pop the nose at the last second so that you just plop onto the grass? That way you have zero airspeed and since the motor is already shut off, the prop cannot break
I have tried just about every different landing method one can think of including what you suggest and yes sometimes I do get lucky but unfortunately with no degree of consistency.

I am considering adding a small foam keel like skid plate to the fuse just aft of the motor and see if that helps.
karolh is offline Find More Posts by karolh
Reply With Quote Quick reply to this message
Old 03-19-2018, 12:19 PM
smdub is offline
Find More Posts by smdub
Registered User
United States, MD, Silver Spring
Joined Dec 2016
113 Posts
There is a scheme of using a servo to push a piece of nyrod into the blade at the hub of the prop at no load to stop it in a horiz position. I'm pretty sure its covered in the RCG Rare Bear thread. You can even Y the servo w/ the existing throttle signal, set the throttle cut to something like -125% (which causes the rod to just touch a blade), and not need an extra channel.
smdub is offline Find More Posts by smdub
Reply With Quote Quick reply to this message


Quick Reply
Message:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools