VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 06-08-2018, 02:07 PM
Robert M's Avatar
Robert M Robert M is offline
 
Join Date: Feb 2006
Location: South Carolina
Posts: 652
Default Soft field takeoffs and Landings

I've gotten some data on short field takeoffs.

I'm in an RV-9 (not an "A") and I was curious if anyone has data for a soft field takeoff. In training, the nose dragger got 10 degrees flaps and full power from a stand still. As the roll starts, pull back on the yoke to get nose wheel up ASAP, then the rest of the plane off the ground ASAP. Maintain ground effect until a speed is reached that will allow a climb, and then slowly retract flaps as speed increases.

If this were the case for my RV-9, I expect the proceedure would be similar.... keep the stick back until liftoff, hold ground effect until climb speed is obtained?

Any suggestions.

Robert
__________________
"Pilots: Looking down on people since 1903"
(author unknown)
RV-9, N556RM, O-320, Dual PMags, Catto 3 blade.
100% finished - FLYING Phase 1
Mosquito XEL kit in garage being built.
Reply With Quote
  #2  
Old 06-08-2018, 02:13 PM
David Paule David Paule is online now
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 3,553
Default

In my C180, one thing to do is to get the tailwheel just off the ground as soon as it will lift off. It has significant drag on soft/rough ground. So start with forward elevator to lift it, but maintain the body attitude that does that. Just barely off the ground, no more.

Dave
Reply With Quote
  #3  
Old 06-08-2018, 03:44 PM
DennisRhodes DennisRhodes is offline
 
Join Date: Jul 2007
Location: Taylorsville, Ga
Posts: 617
Default

What Dave said. I use 10 deg flaps on my 9 on turff field. Use fwd pressure to get the tail up as soon as it will fly. Then allow the plane fo fly it self off . On landing my 9 is better with wheel landings than 3 point. On three point the tail always touches first. ESPECIALLY if the CG is to the rear or on rear limit.
__________________
DRRhodes
2018 VAF dues paid
RV9 N908DR

Last edited by DennisRhodes : 06-09-2018 at 07:42 AM.
Reply With Quote
  #4  
Old 06-08-2018, 03:58 PM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
Posts: 5,316
Default

Unless the soft field was also short, Iíd avoid full power at a standstill. Too likely to pull small stones into the prop. Also, if itís really soft, you donít want to bog down. Runup on firm ground, scan for traffic, then taxi and go without stopping.
Reply With Quote
  #5  
Old 06-11-2018, 11:14 AM
keen9a's Avatar
keen9a keen9a is offline
 
Join Date: Jan 2005
Location: St. Louis, MO
Posts: 229
Default

As others have said, get the tailwheel off first. In theory keep it low, but the time from getting the T/W off to the mains lifting is going to be pretty short unless you are heavy.

Same thing with the transition in ground effect. If you're not loaded with two people and baggage, the RV-9 will just accelerate right on through to a good climb speed. If anything, when light focus on getting the nose up to capture Vx if needed.

Also, if you are not careful, you can blow right through flap speed.
__________________
Ben Keen
RV-9 Flying 8/21/2016
http://www.pbase.com/benkeen/rv9
Reply With Quote
  #6  
Old 06-11-2018, 11:46 AM
luddite42 luddite42 is offline
 
Join Date: Mar 2010
Location: USA
Posts: 393
Default

Soft field issues are mostly academic, since they are part of the PTS, but in reality keep in mind that if a field is so soggy that soft field techniques are really needed, that you're likely leaving ruts, and should be considerate if you're not the owner of the field.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 05:23 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.