is an experiment i made to copy a propeller. tested
on a .46 engine however vibration occured and
grinding of the bearing due to an imbalance hub.
more scrapping of the blade portions is currently
being done until i am able to get a smooth turn.
MADE FUEL HAND PUMP
handpump head will work in sucking fuel out of a
bottle and filling a container - this is a simple
and cheap refueler that i built after my handcranked
refueler broke. -- tip: to cement the pump head
to a stiff tubing (ballpen empty ink tube) i used
A NEW NITRO PLANE BLADE
FROM TWO BROKEN PROPELLERS
so many blades broken and out of desperation, i
was able to formulate a way to recycle them.
this documentation only covers fusing of the two
broken blades. this is a very effective and perfect
repair method that can produce an equal performance
to brand new blades, yet risky for people who cannot
accurately cut the slices for interlocking.
remove the broken section of the blade 2. stack the blades
to mark cutting area 3. notice a lock method technique of securing
HOMEMADE CEMENT FOR BROKEN
(cotton and CA glue - aka. super glue)
Put or wrap a househould ordinary cotton on damaged
area that requires cementing. 2. use a toothpick or a paperclip to maintain
cotton position 3. Pour drops of CA on cotton until all
parts that need to be reinforced is covered with
cotton and soaked in CA.
- when cotton dries it hardens like rock!
GINO'S WAY OF REPAIRING A HELICOPTER
BROKEN CF SKID SUPPORT by Gino R. Punsalan
trainer rods to repair broken skids. 1.
Clean, sand, and drill skid where rod will enter. 2. Cut correct length of trainer rod so that
it goes flush through
the bottom of the skid. 3. Insert rod. 4. Apply hot glue around joint. Build fillet
of glue around joint.
GINO'S WAY OF REPAIRING A CHIPPED-OFF
WOOD PROPELLER by Gino R. Punsalan
Remove loose wood from damaged area. 2. Cut away covering on
damaged area. 3. Sand piece of dry wood
chip on rough sandpaper.
Collect the sanding powder. 4. Apply
electrical tape on bottom of blade which extend (but
not wrapped) beyond the edge. 5. Fill area with wood
powder. 6. Apply
super glue until powder turns dark brown. 7. Peel off electrical
tape. 8. Sand wood-super glue
composite to shape. 9. Wrap
tape of your choice over repaired area. 10. Balance if desired.
(I don't balance and they run smooth anyway.)
week September 2006
most of the time a broken propeller is good as trash.
fortunately i found a way to repair it by stitching
together with a staple wire and reinforced by loctite. procedure is simple: 1. glue back the broken parts using loctite 2. bore a hole where the staple wire can grip
to act as stitches 3. insert the staple wires on holes for grip 4. reinforce by filling the repaired section
surface with loctite
contributor: Carlos Umil III
Repairing a chipped off helicopter
chipping off that leads to running and eventual breaking
of the foam blades for CCPM helicopters can be very frustrating.
fortunately, Mr. Umil found a way to temporarily repair
the props while waiting for the spares to arrive. he came up with the following procedures: 1. checked the portion of the props that need filling
or resheeting 2. use small amount of resin epoxy to fill gaps,
however i personally suggest using a brown paper tape
with cotton inside as fillers so as not to affect weight. 3. sand the dried epoxy to bring back actual shape
and edges of the prop 4. use shrink wrap you can buy from hobby shops
to reinforce and serve as sheeting to the prop surface.
1st week March 2006
crashes sometimes happen due
to simple causes: 1. loose aircraft battery connection - if battery
disconnects in the middle of an aerial stunt result could
be fatal as momentum can push the plane down to the ground
at highspeed and loosing control is not desirable. 2. loose controller battery connection - as fatal
as a loose aircraft battery connection. 3. loose servo - will render an aircraft non-steerable
solution: make sure all linkages and power connections
are well connected.
1st week / Feb 2006
too much elevator deflection can make airplane takeoff
quickly in shorter runways, however it also reduces gliding
time because when throttle is brought down momentum and
gravity starts to take over the airplane and goes to repetetive
stall and dive 'porposing' due to amplification in the
tail, rather than a continuous slow and stable descend
when elevator is positioned at a level.
1st week / Feb 2006
this is a follow-up to the home made
heatsink for dragonfly #4 tail motor. this design is so
effective i no longer get motor burn outs.
1st week / Jan 2006
adding a heatsink can prolong the
life of your motor specialy for micro helicopter tail
motors. heat can melt the insulation holding he commutator
inside the motor thus dislocating the metal contacts and
grinding the brushes rapidly. you can build your own heatsink
from aluminum soda can. it works and with the aid of the
silicon compound as agent for heat transfer.
2nd week / Dec 2005
start your training first with series
of hops inorder to familiarize yawing, forward and back
controls. this time you will also learn how to trim your
helicopter before a higher altitude flight. never right
away fly your helicopter if you are not yet fully familiarized
and ready. if disoriented during flight, your helicopter
might crash and get broken. remember, most rc helicopters
are fragile and much harder to control than rc planes.
be patient and soon you will realize you are already flying
the helicopter with great ease. tame your helicopter first
and it will follow your commands.
3rd week / Nov 2005
using a trainer when learning how
to fly your first electric heli will save you lots of money
and frustration. a longer trainer legs can prevent drift
off collision and tip overs. yes. you can build it from
any existing household materials as long as it is tough
light weight, balanced and mounted correctly. if ever you
find that the materials you have is a bit heavy, dont worry
because most of the time in your preliminary training will
all be hovers forward and landing flights. do not attempt
an immediate high altitude takeoff as you might get disoriented
and crash your heli.
1st week / Nov 2005
contributor: Ray R. of U.S.A.
almost all rc electric foamies
plane pilots will say they all had experienced a chipping
off of lamination on main wings leading edge (constant
chipping off can lead to deterioration of the foam core
and may result to the collapse of the wing). this is caused
by continuous rubbing or the edge to any protruding objects
like grass or weed. to limit the chipping off, wrap the
edge with clear cellophane tape.
3rd week / Oct 2005
tip is applicable to airplanes
with fixed landing gears or non steerable. if you are
practicing a roll on ground, always head to one side of
the runway for a turn to have enough space during the
steer. never start turning the plane from the center of
the runway unless it is wide enough for a turn - or plane
might end up hitting the sides of the runway.
1st week / Oct 2005
neglecting the most simplest of all troubles like overheating
of the battery connectors can be disastrous or fatal.
imagine a trip wire in the middle or an aerobatic and
all servos locked with plane speeding to a momentum -
the result is a pulvurized plane.
always check your battery wiring. if it exhibits power
cut off, it probably means there is something wrong with
contacts or there might be a loose wiring, fix immediately
before the next flight and make sure wiring is heat resistant.
2nd week / Sept 2005
Making airplane do a basic loop
at high altitude is one of the most rewarding moment during
training. The steps is simple: 1. make airplane fly to its peak altitude. 2. turn throttle low when ready. 3. push down elevator (for nose to face down the
ground and tail up high - airplane will start falling
and pick up airspeed) 4. start a full throttle and 5. pull up elevator until plane completes a 360loop
and 6. leave the controls neutral so plane gains balance.