- RacingThis will be updated soon with content about our air racing.
- SpecsSpecifications for Unleashed Lancair Super 360 HORSEPOWER: 250+ h.p. PROPELLER: Hartzell HC-F2YR-1F/F7068-2 (68″) LENGTH: 21 ft WINGSPAN: 23.5 ft WING AREA: 76 sq ft WING LOADING: 19 lbs/sq ft POWER LOADING: 4.78 lbs/hp ASPECT RATIO: 7.1:1 G LOADING (Ult.): +9, -4.5 EMPTY WEIGHT: 1253 lbs GROSS WEIGHT: (Max T.O.) 1800 lbs FUEL CAPACITY: 52 Gallons w/Long Range Tanks USEFUL LOAD: 547 lbs BAGGAGE CAPACITY: 50-70 lbs (maximum) CABIN WIDTH: 42.4 in CABIN HEIGHT: 42.5 in SEATS: 2 conventional MAX SPEED, SEA LEVEL: 255-260 mph (debatable..) CRUISE TYPICAL: 250 mph true airspeed STALL SPEED: (Dirty) 63 mph SERVICE CEILING: 18,000 ft TAKEOFF DISTANCE: 390 ft LANDING DISTANCE: 900 ft CROSS WIND LANDING COMPONENTt: 21 mph FUEL CONSUMPTION @ 75%: 12.5 gph MAXIMUM RANGE: 1040 sm (no res.) RATE OF CLIMB: 2500 fpm @ gross
- EngineThe main thing that separates Unleashed from the other Lancair aircraft is the engine. The Superior Air Parts XP-400SRE. For starters, this is NOT just a bored out IO-360. Far from it. The XP-400 has a 1/8″ lager bore and a 1/4″ longer stroke. It also shares the same roller cam system that other Superior XP-360 engines have, but with a different cam profile. Unleashed has the one and only SRE version of the 400. SRE (Superior Race Engineering) adds a few things that other engines do not. The biggest thing is 10:1 compression ratio and the cam profile to take advantage of the higher compression. Also, the XP-400SRE is rated for 3,400 rpm. I have yet to find a prop that will accept that rpm, unfortunately. Specs are as follows: Model: IO-400-J4AD3 SRE (XP-400SRE) Horsepower: 250+ Displacement: 400 cubic inches Number of cylinders: 4 Maximum RPM: 3,400 Bore x Stroke: 5.25” x 4.625” Compression Ratio: 10:1 Fuel: Avgas Weight: 310 lbs
- PhotosBelow are links to individual galleries. [portfolio cat=4 column=3 link=post max=9]
- For Sale
Welcome to Unleashed Air Racing. I built this website to showcase many of the modifications/improvements I have made to my Lancair 360 named Unleashed. The older Lancair aircraft do not have much of a web presence. (Probably because most were completed before the Internet!) One of my goals is to provide a place for other owners to share ideas and learn about their aircraft.
I purchased Unleashed as a flying airplane. This is a double edge sword. On one side, you get a flying airplane. On the other side, you get all of the previous owners ideas incorporated into one airplane. Not pointing any fingers here, this goes back to the original builder. Everyone has an idea for a system to work best. The problem is that idea usually doesn’t mesh well with my new idea. So, I have learned to approach things differently. For starters, rule number one is this: Assume Nothing
When I get an idea for a system it is best to think of it from a few different perspectives.
- What was the original builders goal?
- How will that affect my idea?
- Will the two systems work in harmony?
- If not, how to re-engineer a fix for both?
Time and time again I have found things that I had assumed would be correct, and they were not. That usually leads to a system re-design that in my opinion is harder than the original build process. Having to deal with these issues is what separates an Experimental buyer from a builder, and often why “buyers” have much more risk involved. Moral of the story, lesson learned.
Anyway, so the goal here is to share what I have learned for everyone’s benefit. Most of the modifications are covered in the Projects section of the website. Some are maintenance issues, and some are speed improvements. Some of the more recent projects are listed below. Also be sure to view the Videos page. Tons of great stuff from when the airplane is doing what it does best, going fast! Feel free to contact me with any questions, I would be happy to talk airplanes.
My frequent readers will know that I have had previous spinner issues. Mainly the main bulkhead would develop cracks around the 4 mounting bolts that attached the bulkhead to the propeller hub itself. I knew the spinner dome may have been the culprit, but I thought I could make a rear bulkhead strong enough to withstand any vibration caused by …
During my firewall forward modifications I ran in to a bit of a problem. For starters, remember this engine is …
The problem isn’t the exhaust itself, matter of fact it has been (one of the few things) trouble free. The …
So everyone asks, why? Legitimate question. Let me cover some of the basics here. This is a small tail Lancair …
As part of my “mass overhaul” of the airplane I noticed a fair amount of play in the outer aileron …
It is of no surprise that when I chose to make a few changes to my engine baffling, it meant …