 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
tc1917(at)bellsouth.net
Guest
|
 Posted: Thu Sep 03, 2015 2:08 am Post subject: Angle of engine |
 |
|
To explain my comment on raising the rear of the engine on slingshots I offer this: They changed the angle of attack on the slingshot from the norm of 12 degrees AOA to 9 degrees. As you added speed to the kolbs the tail kept climbing up until it was almost tipping over in the air. It creates its own drag. You could change a few things and still never keep it level. However, the kolb is designed to stay level in flight throughout the speed cycle. Somehow they missed the fact the engine mounts were not in the proper line with the fuse. You MUST raise the rear of the engine to keep the prop more aligned to the flightline of the aircraft or the motor actually pushes the craft over onto its nose - in flight and on the ground. The slingshot is the only one to have this extreme problem. Without modification the engine looks as if it is falling backwards and the thrust pushes the craft over. I suppose there will be a doubting Thomas out there. The drag induced by this setup is extreme. I reversed the lord mounts so the rear were up and the front mounts were down and added a 3/8 inch shim (kolb supplied) on top of the mount in the rear. Spent many hours with my 582 and then again with the 912 correcting this flaw in the design of the SS. There is no bungie in the world that will straighten your flight as the cure I just mentioned. Trust me on this. I would be happy to discuss this off line with anyone. Email me and i will call you. If you have never flown a slingshot you will not understand this. The 'New kolb company' knew this. The short tail boom really makes it stand out. I almost never have to change el trim in flight up to 95 mph. Faster requires a little effort on the stick. Hope this helps anyone out there with a slingshot they are fighting with for trim. Ted cowan slingshot 900hrs 912ul zoom zoom By the way, 85 to 95 is normal cruse for this combination at abt 3.4 gph!!!
Sent from my iPhone
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kolb-List |
|
|
|
| Back to top |
|
 |
John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
|
| Posted: Thu Sep 03, 2015 6:55 am Post subject: Angle of engine |
|
|
I didn't understand what you meant by "heavy stick".
Thanks for the info.
john h
mkIII
Wenatchee, WA
--
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kolb-List |
|
_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
