Had a J owner friend volunteer to help with the rigging of my 74F. Prior to checking it out, I was getting no more that 130 KTS IAS on the speedometer.
I flew up to his heated hangar today (we are in Canada. Heat is important in February) and using his travel boards, did the following:
- set both ailerons to 0 degrees (one was +2, other was -.5)
- set flaps to -1 degrees (from 2 degrees on one to 0 on the other)
- rotated the exhaust towards the rear (it was almost pointing straight down)
- rotated the Lasar tie down rings 90 degrees (I had them pointed to the back)
- adjusted the trailing edge on the rudder (I was requiring to use left rudder to keep the ball cantered. The trailing edge was bent to the pilot side substantially)
- adjusted the cabin door so the leading edge sealed better to the fuselage (there’s was a 1/8” step between the door and the fuselage .
Total time, including the BS sessions and checking out his panel improvements was around 2.5 hours
We took our planes for a rest flight after. The result was a 138 KTS Indicated airspeed! TAS resulted in 147 KTS, which is right in line with the POH expectations.
My aircraft hasn’t been washed or waxed in months, so I’m looking forward to giving her a bath once the weather warms up to see if I can’t break the 150 TAS mark.
It’s worth taking at look at your rigging for an easy speed pick up.