Great Planes HyperFlow Ducted Fan System - GPMG3910/3911 - Manual (Page 3)

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The fan swept area (FSA) is 2.74in 2 [17.68cm 2 ]. The minimum
intake area for this fan is 3.67in 2 [23.6cm 2 ]. This represents
134% of the FSA. This area can easily be achieved by using
a straight tube intake. Whenever possible, however, make
the intake as large as the model will aesthetically allow.
Exhaust area is equally important for the fan to perform well.
Using a straight-tube exhaust (134% FSA) will simplify the
construction of your duct, but at the cost of thrust and speed.
The optimum exhaust area for this fan is between 90 and
99% FSA (see graphs on the previous page). 99% FSA is
2.71in
2 [17.5cm 2 ] while 90% FSA is 2.46in 2 [15.9cm 2 ]. The
Hyperfl ow will deliver slightly more thrust at slower rpms
with 99% FSA, but in all other fl ight regimes, the 90% FSA
exhaust will deliver more thrust and speed.
Useful Conversions:
134% FSA 3.67in 2 [23.6cm 2 ] = 2.162in [54.9mm] circle
99% FSA 2.71in 2 [17.5cm 2 ] = 1.857in [47.2mm] circle
90% FSA 2.46in 2 [15.9cm 2 ] = 1.769in [44.9mm] circle
KIT INSPECTION
Before starting to assemble, take an inventory of this kit
to make sure it is complete, and inspect the parts to make
sure they are of acceptable quality. If any parts are missing
or are not of acceptable quality, or if you need assistance
with assembly, contact Product Support. When reporting
defective or missing parts, use the part names exactly as
they are written in the Kit Contents list.
Great Planes Product Support
3002 N Apollo Drive, Suite 1 Champaign, IL 61822
Telephone: (217) 398-8970, ext. 5 Fax: (217) 398-7721
E-mail: [email protected]
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NOTE: Motor is only included in GPMG3911.
1. Ducted Fan Housing 6. Front Housing Flange
2. Stator Extension 7. 20mm Brushless Motor Adapter
3. Aft Cone 8. Mounting Screws and Washer
4. Rotor Cone 9. Fan Rotor Adapters (2, 2.3, 3mm)
5. Fan Rotor Blade 10. Motor
ORDERING REPLACEMENT PARTS
Replacement parts for the Great Planes HyperFlow EDF are
available using the order numbers in the Replacement Parts
List that follows. The fastest, most economical service can
be provided by your hobby dealer or mail-order company.
To locate a hobby dealer, visit the Great Planes web site at
www.greatplanes.com. Choose “Where to Buy” at the top of
the page on the right side. Follow the instructions provided on
the page to locate a U.S., Canadian or International dealer.
Parts may also be ordered directly from Hobby Services by
calling (217) 398-0007, or via facsimile at (217) 398-7721,
but full retail prices and shipping and handling charges will
apply. Illinois and Nevada residents will also be charged
sales tax. If ordering via fax, include a Visa
® or MasterCard ®
number and expiration date for payment.
Mail parts orders and payments by personal check to:
Hobby Services
3002 N Apollo Drive, Suite 1
Champaign IL 61822
Be certain to specify the order number exactly as listed
in the Replacement Parts List. Payment by credit card or
personal check only; no C.O.D.
If additional assistance is required for any reason contact
Product Support by telephone at (217) 398-8970 or by
e-mail at [email protected]
Replacement Parts List
Order Number Description
GPMG3940
Fan Rotor Blade
GPMG3941 Miscellaneous Parts
GPMG3942 Outer Duct
GPMG3943 Rotor Adapter