Search found 9 matches

by DavidMandel
Thu Sep 26, 2024 6:09 pm
Forum: IV/IV-P/IV-PT
Topic: Lancair Video
Replies: 0
Views: 140

Lancair Video

Hi All, I made a fun little video of me and my wife's flying adventures this summer in my IV-P, thought this community might enjoy it: https://www.youtube.com/watch?v=-y2vtwGBxys I have to say what an unbelievable plane this is. I started flying it in May 2024 and already have been coast to coast, f...
by DavidMandel
Mon Aug 26, 2024 12:45 am
Forum: IV/IV-P/IV-PT
Topic: Swinging the gear
Replies: 4
Views: 537

Re: Swinging the gear

Ha I think I know what you mean by scary, the whole plane rocks when the gear is extended or retracted! My IV-P actually does not have jack points installed and so we (an A&P and myself) have had to use a hand jack under each wing. Each jack has a few wood crates and a blanket on top of the crat...
by DavidMandel
Sun Aug 25, 2024 6:26 pm
Forum: Lancair Safety
Topic: IV-P Best Glide Speed Testing
Replies: 7
Views: 866

Re: IV-P Best Glide Speed Testing

What was the propeller rpm? The prop is a huge drag source, the lower the rpm, the lower the drag. In some cases the lowest rpm limited by design, in other cases it is an adjustment issue. power off glide.jpg The results I posted are with full low RPM prop which is what I would use in a real power ...
by DavidMandel
Sun Aug 25, 2024 6:21 pm
Forum: Lancair Safety
Topic: IV-P Best Glide Speed Testing
Replies: 7
Views: 866

Re: IV-P Best Glide Speed Testing

Tom Nalevanko wrote: Fri Aug 23, 2024 7:59 pm Great post, Perhaps I missed it, but Gross Weight is a variable. What was yours?
Thanks
Tom
Good point. Weight was around 3000 lbs.
by DavidMandel
Thu Aug 22, 2024 4:31 pm
Forum: Lancair Safety
Topic: IV-P Best Glide Speed Testing
Replies: 7
Views: 866

IV-P Best Glide Speed Testing

I conducted a series of flight tests in my IV-P N540LM to experimentally determine my plane's best glide speed. Thought I'd share my results because I found my best glide to be around 137 KIAS/9.5:1, which differs from my POH: "The best glide speed tested to date is 120 KIAS, 1570 FPM resulting...
by DavidMandel
Wed Aug 14, 2024 3:27 pm
Forum: IV/IV-P/IV-PT
Topic: Aggressive Autopilot
Replies: 5
Views: 499

Re: Aggressive Autopilot

Yes the control head is mounted flat on the instrument panel. See attached photo.
by DavidMandel
Tue Aug 13, 2024 5:33 pm
Forum: IV/IV-P/IV-PT
Topic: Aggressive Autopilot
Replies: 5
Views: 499

Aggressive Autopilot

Hi All, On several recent flights in my IV-P I've noticed my GMC 305 autopilot is a bit aggressive on the roll axis. It will turn the plane 40+ degrees of roll, overbank past the desired heading and hunt its way back. Worse, it will quickly lose 500' of altitude during these aggressive turns without...
by DavidMandel
Fri Jul 26, 2024 11:23 pm
Forum: IV/IV-P/IV-PT
Topic: Air Conditioning Options
Replies: 6
Views: 1753

Re: Air Conditioning Options

Thanks George. On your comment to turn off pressurization, what's your workflow to do so? I usually push in the pressurization knob in the cockpit as slowly as I can but usually end up with some ear popping.
by DavidMandel
Fri Jul 26, 2024 8:57 pm
Forum: IV/IV-P/IV-PT
Topic: Air Conditioning Options
Replies: 6
Views: 1753

Air Conditioning Options

I'm looking for ways to cool down my cabin, especially during ground ops and while on climbout and approach. My IV-P has no cabin fan or A/C. We currently use a fan clamped on to the instrument panel glareshield and a small portable A/C unit like this one https://www.amazon.com/Portable-Air-Conditio...