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International Waters Gallery

Another pit box idea

pit box 006.jpg

6 files, last one added on Jul 22, 2006
Album viewed 37 times

precision cable collet assembly


58 files, last one added on Sep 27, 2007
Album viewed 156 times

26 albums on 3 page(s) 3

Random files - Jim Allen's Gallery
propellers 006.jpg
1120 viewsThis is a Kalfus type pitch gage. It reads pitches directly with removable plates in 1/8 inch steps; five different pitch plates can be mounted at one time. The idea for this pitch gage is taken from the Machinery's Handbook; 21 edition; page 1480 (helical milling). The gage has plates to enable pitching from 3 to 11 inches. This very accurate pitch gage is easy to use & it can mount a Starrett .0005 in dial indicator for making blades identical.Jim Allen
gas tank 001.jpg
Eagle SG 80 side & top view378 viewsA fuel tank is designed to fit both the SG 80 & the SG gas boats. A side view & a top view of both hulls makes the tank measurement easy.Jim Allen
dynamometer 040.jpg
.156 thick & .125 thick rotors610 viewsThe .156 thick rotor is on the left. Again, it is relieved in the center to keep everything centered. With holes going through the rotor there are a total of 24 holes. Jim Allen
522 viewsThis fixture is used to machine & bend throttle arms.Jim Allen
torque cradle loading devices 006.jpg
2 in hexagon stock after cutting426 viewsJim Allen
torque cradle 018.jpg
Dedicated table for torque cradle714 viewsIn the bottom of the picture, mounted on the table, there is a flow gage & a water control valve that are used to control engine temperature. Also notice the two black, round delrin pieces, mounted to the table top. They hold the dyno feet & prevent movement of the dyno during dyno pulls.Jim Allen
Deep-Groove Ball Bearing 067.jpg
Hot wire cutter & isolation transformer226 viewsThis small hot wire cutter measures 6 in; uses a .032 dia nichrome wire & will cut any foam available at 2.0 to 2.5 volts. The tension is maintained on the nichrome wire by bending the G-10 fiber glass bow. Jim Allen
Deep-Groove Ball Bearing 046.jpg
1142 viewsTuned pipes have a brass ferrule silver soldered to the head pipe. The stepped header that is bolted to the engine has a seat machined on its inner rear edge that matches the ferrules radius. The round knurled clamp nut has the same radius machined on its inner rear edge. When the two are screwed together there is no leakage. A small amount of movement is allowed because the stepped area in the engine header piece is .015 larger in dia. than the head pipe. Pipe pressure is picked up between the engine & the stepped header. This system completely eliminates silicon rubber "O" rings & tubings used to seal & connect tuned pipes to engines. Jim Allen
468 viewsAfter clamping .010 thick spring steel pieces between two aluminum pieces, they are machined square to a convienent size. Boring with carbide gives a clean hole without burs. Jim Allen
pit box 001.jpg
Pit box418 viewsThis pit box contains all the necessary items to start the engine. There is no battery for an electric starter because the engine is started with a pull chord. In the photo beneath the box are some typical pull chords made of 1/8 dia nylon & kevlar braided ropes. The glow plug cables are very fine stranded 12 gage copper wire. Their ends are staggered to prevent accidental contact & a insulator is connected between them during transport. This is necessary because the glow plug battery is a 10 amp hour nickel cadium wet cell. It easily lights any glow plug used, including a Novi Rossi # 9. The aliminum plate holds various types of glow plugs including tappered seat & standard types.Jim Allen

Last additions - Jim Allen's Gallery
642 viewsCompleted pieces are all interchangeable & after mounting to the flywheel are within +-.0002 concentricity 1.000 in from the split collets face. The same type of a flanged piece with six mounting holes is made when I set up ball and pin universals for solid shaft applications. When using the solid shaft method the thrust is driven up the entire shaft into the engine by using hardened thrust washers between the ball ends & there sloted ends. Jim AllenSep 27, 2007
545 viewsThese spring steel washers will prevent any galling of the clamping nut, even when it is tightened with great force.Jim AllenSep 27, 2007
565 viewsMachine an arbor; fasten pieces securely; machine the OD with carbide. Finished washers have no burs on the OD or ID & are very precise.Jim AllenSep 27, 2007
364 viewsJim AllenSep 27, 2007
468 viewsAfter clamping .010 thick spring steel pieces between two aluminum pieces, they are machined square to a convienent size. Boring with carbide gives a clean hole without burs. Jim AllenSep 27, 2007
479 viewsThis photo shows the locking nut being singled pointed internally. This piece does not have to be hardened because it will ride against the spring steel washer when tightening the split collet. It is made of #316 stainless steel.Jim AllenSep 27, 2007
443 viewsThe collet holding fixture is made of #316 stainless steel & is not hardened. Jim AllenSep 27, 2007
423 viewsThe split collets are ground internally while being held in the fixture directly above them. External grinding was proved to be un-necessary.Jim AllenSep 27, 2007
527 viewsThis photo shows the back ends of the split collets being ground square to their ID's. This is done in a Suburban Tool Master-Grind. (+-.00005 spindle runout) The split collets are wrung onto a hardened indicated gage pin for this operation.Jim AllenSep 27, 2007
785 viewsTwo 6-32 SHCS, a precisely machined steel hub on the flywheel face (.5002 OD) & a flange on the tapered sleeve which has a 1.125 in OD (.5000 ID), ensures positive location of the tapered sleeve each time it is mounted. The hub is #316 stainless steel & is shrunk into the flywheel before final machining. Notice the six bolt hole pattern used on the tapered sleeve's flange. This feature allows automatic positioning of the propeller to a horizontal position if the engine should stop suddenly at wide open throttle & prevents the hull from diving! It is used on solid drive shaft setups.Jim AllenSep 27, 2007