HBZ7390 Manual
User Manual: Manual Float Set: Super Cub LP, Carbon Cub S+ | HorizonHobby
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HBZ7390
HobbyZone® products are distributed exclusively by
Horizon Hobby, Inc.
4105 Fieldstone Road
Champaign, IL 61822
©2009 Horizon Hobby, Inc.
Horizon Hobby UK 
Units 1-4 Ployters Rd 
Staple Tye 
Harlow, Essex 
CM18 7NS
United Kingdom
Horizon Hobby Deutschland GmbH 
Hamburger Strasse 10 
25335 Elmshorn 
Germany
14931  Printed 3/09

Congratulations on your purchase of the HobbyZone®  
Super Cub Floats. These floats add a new level of fun and  
excitement to your Super Cub.
Note:  Only use the floats if you are comfortable flying your Super Cub 
and have repeatedly and successfully taken off, flown and landed. 
Flying off water poses a higher risk to the airplane because the 
electronics can fail if immersed in water.
Crash damage is not covered 
under the warranty.
Be sure to read the warranty 
on page 16 and "Warnings and 
Safety" on pages 14–15 before 
you proceed to Step 1.

3
Step 1
4
Step 1
Assembly
•  Remove contents from the box  
and inspect for missing parts or  
any damage.
•  Separate the eight 3mm x 10mm 
Phillips head machine screws, the 
spreader wires and the two landing 
gear legs.
•  Note that there is a right and left 
float. The indentions in the foam for 
the spreader wires and landing gear 
will face inward.
•  Install the landing gear with the wider 
top portion into the front holes on the 
floats. Next install the front spreader 
wire into the second holes on the 
floats. Install the rear spreader wire 
into the third holes on the floats.  
Finally, install the rear landing gear 
legs with the narrower top portion into 
the rear holes on the floats.
Wider
Right Float
1 (front holes)
4 (rear holes)
4 (rear holes)
2
3
3
Left Float
1 (front holes)
2

5
Step 1
6
Step 2
Installation
•  Install the eight 3mm x 10mm Phillips 
head machine screws into the  
floats making sure the screws are 
tightening against the flat spots on 
the wires.
•  Install 10 x 8 propeller included with 
the float kit*. Do not use the 9 x 6 
prop included with the airplane as 
there will not be enough power to 
successfully fly on floats.
*  When using the 10 x 8 propeller, it is  
essential that you allow approximately 
10–15 minutes between flights in order 
to allow the 480 motor to properly cool. 
Failure to follow this warning will greatly 
reduce motor life.
•  Remove the landing gear and  
landing gear covers from your  
Super Cub.
•  Insert the front landing (wider) gear 
wire of the floats into the front  
landing gear slot.
•  Insert the rear landing gear wire into 
the rear float mount in the fuselage.
Rear Float 
Mount
•  The Super Cub LP (blue Super Cub 
with Li-polymer battery) comes with 
the rear float mount pre-installed in 
the fuselage.  If you are attaching 
your Super Cub floats to an original 
red Super Cub (HBZ7100), a rear float 
mount will have to be installed into 
the fuselage.  This is a separate part 
that has been included with this float 
set.  Please see page 9 for installation 
instructions.

7
Step 2
8
Success Tips
•  Install the landing gear straps on the 
rear float mount with the included 
self-tapping screws.  
Note:  If installing the floats on the original 
red and white Super Cub (HBZ7100), 
refer to page 9 of this manual for  
installation of the rear float mount.
Prior to each flight, make sure ACT is off  
and never attempt to fly with the floats with 
ACT on.
When flying with floats always take off 
and land into the wind. Do not fly off 
water when the wind is too high as the 
wind causes larger waves and makes the 
plane more likely to flip over. 
Attempt your first float flight only if the 
water is calm with very little wind. When 
taxiing in the water always hold full up-
elevator. When starting your takeoff or 
just after touchdown, hold up-elevator 
to prevent the floats from “digging” 
into the water and causing the plane to 
flip over. 
On takeoff when the floats begin to ride 
on top of the water, or get “on step”, 
reduce the up elevator input and allow 
the plane to build up speed before  
lifting off. 
When flying off water there is usually a 
lot of room to fly, do not try to force the 
plane into the water. Let the airplane 
settle into the water when landing. If a 
float starts to “dig” into the water it will 
cause the airplane to veer to one side or 
the other.  Reduce power immediately 
and abort the takeoff.
The floats add weight well below the 
airplane and cause a “pendulum” effect 
that will change the flying characteristics 
of the Super Cub.

9 10
When finished flying off water check all 
components for water, if any water is in 
the airplane or around the battery  
cavity, dry with a paper towel.
Check for water inside the floats. The 
joint between the plastic bottom surface 
and the foam structure has been sealed, 
but if for some reason that seal has 
been broken, water could build up  
inside the float.  This could cause  
serious weight gain and/or CG issues.
Installing Floats on the Red and White Super Cub
If installing floats on your red and white 
Super Cub (HBZ7100), you will need to 
install the included rear float mount on 
the fuselage.
Note:  We recommend you change the  
receiver unit in your red and white 
Super Cub to the receiver unit in the 
Super Cub LP. You will also need to use 
the 3S 11.1V Li-Po Battery (PKZ1033) 
The ESC auto cut in the original Super 
Cub has been set for Ni-MH cells and 
can cause permanent damage to a Li-Po 
battery pack if flown to the low-voltage 
cutoff point.
Measure back 5 3/4 inches from the 
rear of the slot for the original landing 
gear. Place the front edge of the rear 
float mount at this distance and press 
the rear mount into the fuselage of your 
Super Cub. 
Note:  The rounded corners will be facing 
forward. 
Success Tips (continued)

11 12
Press hard enough to leave marks in the 
foam on the fuselage to indicate what 
foam needs to be removed. Set the 
rear mount aside, then slowly cut away 
where the foam is compressed by the 
rear float mount until the mount is flush 
with the bottom of the fuselage. 

13 14
Glue the rear float mount into the  
fuselage using epoxy, making sure not 
to get epoxy in the screw holes. Go to 
the assembly and installation section 
when done mounting the rear float 
mount into your Super Cub.
Note:  The rear float mount will rest on top of 
the foam and not be recessed into the 
bottom of the fuselage. 
•  Do not y off of water if you are 
uncomfortable flying the Super Cub 
on land. Only use the floats if you can 
fly the Super Cub without having any 
incidents and can take off and land 
smoothly and multiple times in a row.
•  Do not y in wind over 5–7 mph 
(8-11km/h) as wind will cause larger 
waves and make the plane more 
susceptible to flipping over.
•  Always stay clear of the propeller.
• Always select wide open spaces.
•  Always follow all aircraft instructions 
when using the floats.
• Always y your aircraft responsibly. 
•  Stay away from boat wake as it may 
cause the airplane to flip or splash 
water into the airplane and on the 
electronics.
Warnings and Saftey
•  Always check the bottom of the oats 
each time you pull the airplane out 
of the water to check if there is any 
damage from hitting submerged 
sticks or rocks. If water is found in a 
float, it needs to be carefully  
removed before the next flight.
•  Never attempt to swim out to your 
airplane in the water. Use a boat, 
RC boat or fishing pole to retrieve 
your airplane. Also be aware that 
the airplane is still powered up when 
retrieving it.
•  Never retrieve the airplane alone. 
Always have another person with you 
to assist in retrieval.
•  If the motor of the airplane gets  
wet, do not power up to get the 
airplane back to the shore. It is  
possible to burn up the motor if it is 
run while wet.

15 16
•  Always allows 10-15 minutes for the 
motor to cool between flights when 
flying with the 10 x 8 propeller. The 
Super Cub’s 480 motor may be  
damaged if you don’t follow this 
warning. 
Prior to each flight, make sure ACT is off  
and never attempt to fly with the floats with 
ACT on.
Warnings and Saftey (continued)
The Super Cub Floats are guaranteed 
against any manufacturing defects at 
the time of production. There is no  
warranty of any kind from damage to  
either the aircraft or the floats itself due 
to hard landings or crashes. If you have 
any questions regarding your floats, 
please contact the Horizon Service  
Center at 1.877.504.0233
Warranty Period
Exclusive Warranty- Horizon Hobby, Inc., 
(Horizon) warranties that the Products 
purchased (the “Product”) will be free 
from defects in materials and  
workmanship at the date of purchase by 
the Purchaser. 
Limited Warranty
(a) This warranty is limited to the original 
Purchaser (“Purchaser”) and is not  
transferable. REPAIR OR  
REPLACEMENT AS PROVIDED UNDER 
THIS WARRANTY IS THE EXCLUSIVE  
Warranty
REMEDY OF THE PURCHASER.  This 
warranty covers only those Products 
purchased from an authorized Horizon 
dealer. Third party transactions are 
not covered by this warranty. Proof of 
purchase is required for warranty claims. 
Further, Horizon reserves the right to 
change or modify this warranty without 
notice and disclaims all other  
warranties, express or implied. 
(b) Limitations- HORIZON MAKES NO 
WARRANTY OR REPRESENTATION,  
EXPRESS OR IMPLIED, ABOUT NON-
INFRINGEMENT, MERCHANTABILITY 
OR FITNESS FOR A PARTICULAR  
PURPOSE OF THE PRODUCT. THE  
PURCHASER ACKNOWLEDGES THAT 
THEY ALONE HAVE DETERMINED 
THAT THE PRODUCT WILL SUITABLY 
MEET THE REQUIREMENTS OF THE 
PURCHASER’S INTENDED USE.   

17 18
(c) Purchaser Remedy- Horizon’s sole  
obligation hereunder shall be that 
Horizon will, at its option, (i) repair or 
(ii) replace, any Product determined by 
Horizon to be defective. In the event of 
a defect, these are the Purchaser’s ex-
clusive remedies. Horizon reserves the 
right to inspect any and all equipment 
involved in a warranty claim. Repair or 
replacement decisions are at the sole 
discretion of Horizon. This warranty 
does not cover cosmetic damage or 
damage due to acts of God, accident, 
misuse, abuse, negligence,  
commercial use, or modification of or to 
any part of the Product. This warranty 
does not cover damage due to  
improper installation, operation,  
maintenance, or attempted repair by 
anyone other than Horizon. Return of 
any goods by Purchaser must be  
approved in writing by Horizon before 
shipment.
Damage Limits
HORIZON SHALL NOT BE LIABLE FOR 
SPECIAL, INDIRECT OR  
CONSEQUENTIAL DAMAGES, LOSS 
OF PROFITS OR PRODUCTION OR 
COMMERCIAL LOSS IN ANY WAY 
CONNECTED WITH THE PRODUCT, 
WHETHER SUCH CLAIM IS BASED IN 
CONTRACT, WARRANTY,  
NEGLIGENCE, OR STRICT LIABILITY.   
Further, in no event shall the liability of 
Horizon exceed the individual price of 
the Product on which liability is  
asserted. As Horizon has no control over 
use, setup, final assembly, modification 
or misuse, no liability shall be assumed 
nor accepted for any resulting damage 
or injury. By the act of use, setup or 
assembly, the user accepts all resulting 
liability. If you as the Purchaser or user 
are not prepared to accept the liability  
associated with the use of this Product, 
you are advised to return this Product 
immediately in new and unused  
condition to the place of purchase.
Law:  These Terms are governed by 
Illinois law (without regard to conflict of 
law principals).    
Safety Precautions
This is a sophisticated hobby Product 
and not a toy. It must be operated 
with caution and common sense and 
requires some basic mechanical ability. 
Failure to operate this Product in a safe 
and responsible manner could result in 
injury or damage to the Product or  
other property. This Product is not 
intended for use by children without 
direct adult supervision. The Product 
manual contains instructions for safety, 
operation and maintenance. It is  
essential to read and follow all the 
instructions and warnings in the manual, 
prior to assembly, setup or use, in order 
to operate correctly and avoid damage 
or injury.
Questions, Assistance, and Repairs
Your local hobby store and/or place of 
purchase cannot provide warranty  
support or repair. Once assembly, setup 
or use of the Product has been started, 
you must contact Horizon directly. This 
will enable Horizon to better answer 
your questions and service you in the 
event that you may need any assistance. 
For questions or assistance, please 
direct your email to  
productsupport@horizonhobby.com, or 
call 877.504.0233 toll free to speak to a 
service technician.
Inspection or Repairs
If this Product needs to be inspected or 
repaired, please call for a Return  
Merchandise Authorization (RMA). Pack 
the Product securely using a shipping 
carton. Please note that original boxes 
may be included, but are not designed 
to withstand the rigors of shipping  
without additional protection. Ship via a 
carrier that provides tracking and  
insurance for lost or damaged parcels, 

19 20
as Horizon is not responsible for  
merchandise until it arrives and is  
accepted at our facility. A Service Repair 
Request is available at  
www.horizonhobby.com on the  
“Support” tab. If you do not have  
internet access, please include a letter 
with your complete name, street  
address, email address and phone  
number where you can be reached  
during business days, your RMA  
number, a list of the included items, 
method of payment for any  
non-warranty expenses and a brief  
summary of the problem. Your original 
sales receipt must also be included for 
warranty consideration. Be sure your 
name, address, and RMA number are 
clearly written on the outside of the 
shipping carton.
Warranty Inspection and Repairs
To receive warranty service, you must 
include your original sales receipt  
verifying the proof-of-purchase date. 
Provided warranty conditions have been 
met, your Product will be repaired or  
replaced free of charge. Repair or 
replacement decisions are at the sole 
discretion of Horizon Hobby.  
Non-Warranty Repairs 
Should your repair not be covered by 
warranty the repair will be completed 
and payment will be required without 
notification or estimate of the expense 
unless the expense exceeds 50% of the 
retail purchase cost.  By submitting the 
item for repair you are agreeing to  
payment of the repair without  
notification.  Repair estimates are  
available upon request.  You must 
include this request with your repair.  
Non-warranty repair estimates will be 
billed a minimum of ½ hour of  
labor. In addition you will be billed for 
return freight. Please advise us of your 
preferred method of payment. Horizon 
accepts money orders and cashiers 
checks, as well as Visa, MasterCard, 
American Express, and Discover cards. 
If you choose to pay by credit card, 
please include your credit card number 
and expiration date. Any repair left 
unpaid or unclaimed after 90 days will 
be considered abandoned and will be 
disposed of accordingly. Please note: 
non-warranty repair is only available on 
electronics and model engines.
United States
Electronics and engines requiring  
inspection or repair should be shipped 
to the following address:
Horizon Service Center
4105 Fieldstone Road
Champaign, Illinois 61822
All other Products requiring warranty 
inspection or repair should be shipped 
to the following address:
Horizon Product Support
4105 Fieldstone Road
Champaign, Illinois 61822
Please call 877-504-0233 or e-mail us 
at productsupport@horizonhobby.com 
with any questions or concerns  
regarding this product or warranty.

21 22
United Kingdom
Electronics and engines requiring  
inspection or repair should be shipped 
to the following address:
Horizon Hobby UK
Units 1-4 Ployters Rd
Staple Tye
Harlow, Essex
CM18 7NS
United Kingdom
Please call +44 (0) 1279 641 097 or 
e-mail us at sales@horizonhobby.co.uk 
with any questions or concerns 
regarding this product or warranty.
Germany
Electronics and engines requiring  
inspection or repair should be shipped 
to the following address:
Horizon Technischer Service
Hamburger Strasse 10
25335 Elmshorn
Germany
Please call +49 4121 46199 66 or e-mail 
us at service@horizonhobby.de with any 
questions or concerns regarding this 
product or warranty.