260 HP Fuel Injection

Reduced Takeoff Distance
Greater Rate of Climb
Superior Performance at Altitude
Better Handling at Slow Speeds
Improved Cruise Speed
Improved Fuel Efficiency
Low Fuel Consumption
Full TCM Factory Warranty
Proven TCM 10-470-F Engine
No Carburetor Ice
Improved Performance at High Density
In 1985, while designing the 260SE/STOL, it was decided that an engine with greater horsepower would
be desirable. This engine would also be offered as an individual upgrade for existing Skylanes. Based upon
our customers’ needs, certain guidelines had to be met. These are:
1 ) Slow-Speed Handling As many of our customers utilize their Skylanes in a utility role, slow-speed
handling and landing characteristics were important. The Skylane tends to be nose heavy anyway, so it
was important to keep any additional weight up front to a minimum. We looked at the IO-520 and the IO550 engines, along with the IO-470. The combined weight of the IO-520 or IO-550 along with their
propellers were simply too heavy. Some weight increases ran over forty pounds. Only the 10470 engine and propeller combination when installed did not degrade the slow-speed handling and landing
2) Range and Endurance Our customers were often times flying into back country areas where fuel was
not available, and many more flew in instrument conditions. An unwanted by-product of going to a larger
cubic inch engine is higher fuel consumption which in turn reduces the aircraft range and endurance.
We wanted an engine whose fuel consumption at an equal percent of power had about the same fuel
consumption as the Skylane’s original engine. The IO-520 or IO-550 at an equal percent of power
would have consumed enough additional fuel to reduce the Skylane’s range and endurance by 1.5
hours. This was not acceptable. The IO-470 engine is the same cubic inch engine as the original Skylane
engine, but with a much more efficient fuel injection system. Due to this, the fuel consumption at an
equal percent of power is the same as the unmodified Skylane. More continuous power with no
reduction in range or endurance. An added benefit is a $10,000 savings in fuel costs through TBO over
the IO-520 or IO-550.
3) Reliability Due to the conditions our customers flew under, maximum reliability was a very important
feature. When looking at the various engines we had to choose from, some facts were obvious. While
the IO-520 is not a bad engine, it likewise has not been a great engine either. The IO-550 has had a very
poor history. The IO-470, on the other hand, has had an excellent service record since the early 1960’s.
Without question, the IO-470 engine is the best, most reliable, big engine manufactured by Continental.
4) Warranty Generally speaking, our customers prefer TCM factory engines. One of their reasons is TCM
factory warranty. We had discussed with Continental the modification of their engines. Teledyne Continental took the logical position - if one of their factory engines was modified, it would lose some or all of
its TCM factory warranty. Obviously, part or all of the warranty would then have to be assumed by the
modifier. This was not acceptable to us or our customers.
When we looked at all the facts, it was obvious that the TCM IO-470-F engine was the best choice for
our 260SE/STOL. Since 1986, we have had hundreds of these engines installed in 1962-1986 Skylanes,
and it has become the standard of the industry.
These are our personal observations after having flown every type of modified Skylane available.
The IO-470 engine reduces the takeoff distance by 25%. It makes a big difference when the airplane is
heavy or operated at high density altitudes.
Once off the ground, the engine allows the airplane to climb immediately without having to level off first
so the airplane can “catch its breath.”
Overall rate of climb is increased by 300-400 fpm, an increase of approximately 40%.
The performance the original Skylane had at 8,000 or 9,000 feet you now have at 13,000-14,000 feet
with the IO-470 engine. A big plus if you fly in the mountains or IFR.
The IO-470 engine is superior in performance to either the carbureted O-520 or O-550. This is due to the
ability of the IO-470 to provide more manifold pressure at all altitudes as compared to the O-520 and O550 with their carburetors and restricted induction system.
Cruise speed is increased at altitudes above 5,000 feet. How much the increase is depends upon the
airframe rigging and how straight it was built at the factory.
Many of our customers buy the conversion just to get the fuel injection alone. Some have owned larger
business aircraft, and they do not want to give up fuel injection. The worry about carburetor ice is
obviously eliminated. Reports have been coming in that O-520’s and O-550’s are, in some instances,
creating more carburetor ice than the original Skylane engine, the O-470.
Fuel consumption on the average IO-470 runs approximately 13 gph. Most IO-520’s and IO-550’s at the
same power setting are running from 16-18 gph. The carbureted O-520’s and O-550’s are generally not
as fuel efficient as their fuel-injected counterparts.
Kits are available for field installation. When ordering a kit, plan three weeks ahead. Cost of our STC’d
kit is $5,000.
If you have any technical questions, we are always available to answer them.
Now you know why we chose this particular engine to power our 260SE/STOL and to upgrade the
Skylane. We feel these facts are sufficient for you to determine whether this engine upgrade is right for you.
We refuse to publish inflated performance figures or factory unauthorized TBO’s. Likewise, we refuse to
prey on an owner’s lack of knowledge concerning engines. We will give you our honest opinion on questions
Happy Flying!
Todd and Jo Peterson
1465 SE 30TH Municipal Airport
El Dorado, KS 67042
316/320-1080 Fax 316/321-3842
Download PDF
Similar pages