hovercraft design
questionnaire
propeller manufacture


Please complete the questionnaire below. According to your details given, we will send you a quotation for a most suitable propeller. Of course, this offer is not binding for you at all.


Questionnaire

CRAFT

Type: max weight: [kg]

Manufacturer:

Max.horizontal speed with max. cont. power: VH = []
Cruising speed: VNO = []
Design/critical speed VNE = []

Special design points:
(Enclose required thrust versus speed if available)

Condition h
[ft/m]
Temp
[ēC/F]
P
[kW/hp]
rpm V
[kts/mph]
N
[N/lbs]
Static
Cruise
Max. speed

Critical condition: climbcompromise cruise

In the case of an unsymmetrical propeller inflow please enclose inflow speed
distribution.

Propeller

Max. diameter: []No. of blades:

right hand left hand Right hand rotation if propeller turns
pusher tractor clockwise in flight direction
fixed pitch constant speed ground adjustable adjustable in flight
reversefeathering

Noise regulation to be considered acc. to

Engine

Type: Manuf.:

Gear box ratio:
(Please enclose corrected power/rpm/altitute - data if nonstandard engine)

Flange connection: Standard(encl. spec.) Drawing enclosed Free

Duct

Duct length:
L = [mm/inch]
Blade axis/duct inflow edge:
dL =   [mm/inch]
Inner duct diameter:
D =   [mm/inch]
Outer duct diameter:
Dm =   [mm/inch]
Hub/Spinner diameter:
d =   [mm/inch]
Duct outlet angle:
A = [ ° ]
Tip clearance:
T =   [mm/inch]
Max. takeoff: P = []n = [rpm]
Max. continuous: P = []n = [rpm]

Comments

Address
Company:
Name:
Street:
City:
ZIP code:
State:
Country:
Phone:
Fax:
eMail:
Internet:


HOFFMANN PROPELLER GmbH & Co KG Tel: +49-(0)8031-1878-0, Fax: +49-(0)8031-1878-78