Small Engines

A balloon-powered race car primarily demonstrates Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. When air escapes from the balloon, it pushes against the surrounding air, propelling the car in the opposite direction. Additionally, concepts of momentum and friction come into play, as the car's speed and distance traveled depend on the force exerted by the escaping air and the resistance from the surface it moves on. This simple system effectively illustrates the principles of aerodynamics and energy transfer.

Make it sleek, and also make it have smooth edges on the wheels; you'll see the results!

Check your float in the carburetor it sounds like it is stuck open.

i would say nitro cause with nitro you just have to refuel to keep going and you don't have to worry about your battery running out of charge or having to remember to recharge and stuff like that, also they hit much higher top speeds

well Im doing the same thing now..myspace.com/cjosiah, but Im using all the ninja wiring including lights etc. but to run the bare engine, you have to take apart the entire wire harness, and only run the oil pres. wire, radiator temp wire, fan controle, distributors, and trans. temp wires to to the control boxes they connect to, and don't forget the starter relay. but yeah its self explanatory once you remove all the black tape, youll see the important wires....if you don't have the original wires and control boxes get a distributor that can control 2 spark plugs from Napa and use some trial and error to get them to fire at the right times...... my email is volksracing1@AOL.com that's also my AIM screen name

Yes, you can, but you need to put a resistance in series with the battery to limit the maximum current, so you don't overheat and cook the battery.

I tend to fast charge my batteries using a 12v light bulb / utility light to lower the current. The bulb will glow when the battery is taking heavy current, and as the battery builds up charge, the current will drop and the bulb will get dimmer and dimmer.

I try to limit the current to 1/10 of the capacity of the battery Im charging if I can.

Otherwise, I monitor it with an ammeter and voltmeter and watch the lightbulb.

$.02

Ed N3SDO

You probably blew the motor up. They won't last long without a functioning governor.

The thickness of a business card!

I don't recall right off what the recommended range of compression is for a 15hp Briggs, but 120lbs is certainly sufficient to start and run th engine. If its a 4 stroke it will be around 10.0:1 10-28-08 Right-o, 120 is great. Briggs no longer releases comp ranges, but states a minimum of 60 to run. Depending on model, that's probably a 7:1 or 7.5:1 engine. Briggs are designed w/low comp ratios for durability, resistance to detonation, and low fuel-grade requirements.

take the nose plastic off disconnect the wires going to the top off the carb , and the wires coming out of the thumb throttle then looking at the front of the the bike on the right there is a small silver box with the same kind of plug in as the ones you already unplugged unplug that box and put the bike back together .

change blower belts

Radio-controlled (or R/C) cars are self-powered model cars that can be controlled from a distance using a specialized transmitter. The term "R/C" has been used to mean both "remote controlled" and "radio controlled", where "remote controlled" includes vehicles that are connected to their controller by a wire, but common use of "R/C" today usually refers to vehicles controlled by a radio-frequency link.

That is the main jet needle valve.

Likely replace the self propelled tranny. not cheap repair job

the top end speed is 65mph.

The dry weight of a 1988 model 25hp Mercury outboard is listed as 105 - 112 lbs depending on the model.

The valves should adjusted to the following specifications: .005 - .007 in. for the intake valve and .009 - .011 in. for the exhaust valve. The valve gap is measured with the piston 1/4" past the TDC on the power stroke.

YES not all the time but it can

You have to be 10+ years old but if it is over 50cc then you have to be 16+ years old

On most of those engines it is 1in" But it could also be 7/8"

I have a Honda 300ex and i took the cover off and it seemed to run a little better and have better throttle response

Engine vacuum will be affected by valve adjustment due to vacuum leakage

when valves are not closed at the proper time, when the piston is on a downward stroke. The vacuum would be less that it should be.