A New Way of Flight Training⦠- American Bonanza Society
A New Way of Flight Training⦠- American Bonanza Society
A New Way of Flight Training⦠- American Bonanza Society
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
www.bonanza.org<br />
With the cowl flaps open, the two legs <strong>of</strong> the U-shaped<br />
pipe are fitted over the tailpipes, as shown in Figure 1.<br />
Warm air is directed through the tailpipes into the exhaust<br />
stack manifold and thence into the cylinders. Warming<br />
the exhaust manifold also transfers heat to the cylinders.<br />
Furthermore, notice that the 4-inch pipe is larger in dia -<br />
meter than the tail pipe. Hence, warm air flows into the<br />
bottom <strong>of</strong> the engine compartment, which warms the oil<br />
sump and the bottom <strong>of</strong> the case.<br />
The most difficult part to construct is the adapter for the<br />
heater. One sample is shown in Figure 2. The basic retangular<br />
box to which the transition to the circular pipe is fitted<br />
is constructed from a single sheet <strong>of</strong> light galvanized steel<br />
or aluminum. The transition from the heater outlet to the<br />
4-inch pipe is made with what is called a duct transition,<br />
or a side transition. The particular one needed depends on<br />
the heater used. They are available from HVAC supply<br />
houses or sometimes home stores.<br />
With a cowl blanket, the system raises the cylinder<br />
temperature about 10° F in 30 minutes to an hour depending<br />
on the hangar air temperature. If the aircraft is parked<br />
on the ramp and there is any wind it takes considerably<br />
longer. If an early morning flight is anticipated, with a<br />
timer used on the electrical supply, the heater can be set<br />
up the day before and the aircraft ready to preflight when<br />
you arrive at the airport.<br />
One word <strong>of</strong> caution: Make sure that the heater is placed<br />
well in front <strong>of</strong> the wing and away from the fuel drains. That<br />
is the reason for the flexible metal pipe. The system has<br />
been used for a number <strong>of</strong> years on both a Model 33 and<br />
a Model 36 fitted with IO-520 and IO-550 engines.<br />
Dave Rogers is a pr<strong>of</strong>essor emeritus at the U.S. Naval Academy<br />
and a highly accomplished aeronautical engineer, author and<br />
educator. He owns an E33A <strong>Bonanza</strong>. www.nar-associates.com<br />
Hampton Aviation, Inc.<br />
Est.1965<br />
• Structural Repairs<br />
• Insurance Approved<br />
• Control Surfaces<br />
• Nationwide Service<br />
• Engine Tear-downs<br />
• Inspections<br />
• Repair Estimates<br />
• Trucking or Ferrying<br />
phone:<br />
479.394.5290<br />
fax:<br />
479.394.0506<br />
www.hamptonaviation.com<br />
Volume 12 • Number 1 AMERICAN BONANZA SOCIETY 35
Change language