International Waters Community

International Waters Gallery

hydraulic dynamometer details


35 files, last one added on Nov 09, 2005
Album viewed 604 times

torque cradle dynamometer details


28 files, last one added on Mar 15, 2006
Album viewed 334 times

bell valve type induction


10 files, last one added on Jul 16, 2005
Album viewed 291 times

fuel metering carburetor


12 files, last one added on Jul 17, 2005
Album viewed 302 times

30,000 rpm machined steel tuned pipe


8 files, last one added on Jul 17, 2005
Album viewed 217 times

propeller details

propellers 006.jpg

13 files, last one added on Jul 25, 2005
Album viewed 961 times

chrome tank details

chrome tank 001.jpg

9 files, last one added on Jul 22, 2005
Album viewed 252 times

liner machining & grinding fixture

chrome tank 015.jpg

4 files, last one added on Jul 22, 2005
Album viewed 181 times

exhaust radii cutting fixture

chrome tank 012.jpg

3 files, last one added on Jul 22, 2005
Album viewed 185 times

how to make a reliable 32,000 rpm+ .90 roller rod

connecting rod 025.jpg

23 files, last one added on Jul 28, 2005
Album viewed 414 times

Non-reversed geared twins

Deep-Groove Ball Bearing 050.jpg

8 files, last one added on Sep 07, 2005
Album viewed 183 times

A .90 or 1.0 cu. in., completly custom built, completly reliable, 7+ HP motor


46 files, last one added on Nov 21, 2005
Album viewed 564 times

26 albums on 3 page(s) 1

Random files - Jim Allen's Gallery
dynamometer 009.jpg
"Standco" model MT-1 digital tach899 viewsThis digital photoelectric tachometer reads 6 to 99,999 rpm. The cost is about $350.00.Jim Allen
gas tank 010.jpg
Outside of the drawn metal piece318 viewsNotice how small the radius is in the corners.Jim Allen
dynamometer 002.jpg
rear view of dyno housing817 viewsThis knurled knob controls a valve which allows infinitely variable loads (from full open to full closed) to be applied to the engine being tested. Repeated dyno pulls tells me where any engine makes its peak HP. There is only point where this takes place; where the torque curve & the RPM curve cross one another.Jim Allen
Engine building 003.jpg
A few of many failed connecting rods.791 viewsConnecting rod materials tested include 2024, 7075, 7079, & 7068 aluminums; 6AL4V titanium; AISI O-1; AISI A-2; CPM-3V tool steel; M-2 tool steel; & AISI-S7 shock resisting tool steel. Connecting rods made of S-7 (oil hardened & tempered) survived many test runs beyond 32,000+ rpm, but completely failed when pushed to 38,000 rpm. The one titanium rod standing on its side used the Perry designed oil pump hole through the middle of a bushed rod to help improve sleeve bearing lubrication. A slot, cut into side of the rod allowed crankcase lubrication to enter on each engine revolution. This was also done to aluminum rods. There was only a slight improvement in performance. In the upper left hand corner is the first steel roller rod (not hardened with pressed in hardened race) which survived 6 runs at 32,000 rpm before failing . The pressed in race turned, closing off the oil lubricating holes. It used a hardened berillium copper retainer. In the middle row, the six rods on the right are made of 6AL4V Titanium. This super alloy does not transfer heat, & requires a seperate material for the bearing surface. These two things make it unsuitable for connecting rods in large motors.

Jim Allen
connecting rod 027.jpg
600 viewsThis fixture is used to machine retainer windows while being held in a B & S type dividing head.Jim Allen
boat parts715 viewsTop left to right; my liner with the head bolts going through the lip- chromed in my tank & ground; piston machined from bar; "I" beam steel connecting rod; stainless steel filters with replaceable stainless screens for fuel & water ("O" ring sealed); 7075 T-651 strut; 7075 T-651 aluminum rudder assemblies; .0625 spring steel full wedge skid fin with the skid fin angle machined on the mount.Jim Allen
connecting rod 001.jpg
Emco Maier Super 11 in lathe746 viewsA precise lathe is required for the grinding of connecting rods, liner tapers, steel front ends & general boat parts. Notice the .0001 water proof; shock proof; jeweled movement; AGD 2 type indicators mounted on the cross feed & the carriage stop for the dimensional accuracy of any part machined. The lathe has a complete set of tooling including; 3,4, & 6 jaw chucks; taper attachment; steady and follower rests; metric & american thread dials; complete set of 5-C collets (1/64 to 1.125 in 1/64 in steps; hex, square & machinable collets; face plates; precision drill chucks; precision dead & live centers (.0001 concentricity); coolant & many custom modifications.Jim Allen
connecting rod 026.jpg
653 viewsAfter the retainer is machined inside and outside with a relief in the middle, the roller windows are cut using a dividing head. The fixture has a B&S No. 10 taper which fits in the spindle of the dividing head. Jim Allen
413 viewsThrottle arm bending fixture.Jim Allen
Engine building 006.jpg
machined & hardened retainers653 viewsThese examples of failed retainers, except the piece on the far right, are typical when engine rpm's exceed 32,000 for extended periods of time. Materials used & tested include beryllium copper (full hard # 172), A-2 tool steel (Rc-60), & C-350 maraging steel (RC-62). The piece on the right made of (C-350) maraging steel, has been tested many times at 32,000+ rpm's without wear or failure using oil contents of 6 to 8%. The retainer's OD is guided in the connecting rod's ID with .001 clearance. Also notice the wide window in this retainer which accepts two side by side rollers. This increased the load carrying ability & the wear resistance of the assembly greatly. There is no problem with the two rollers rubbing against each other as thought by some engine builders! The retainer is necessary at high rpm to prevent the rollers from developing a "helix angle" common with all uncaged assemblies. This problem with uncaged assemblies in high speed applications causes high friction, high heat & eventual failure.Jim Allen

Last additions - Jim Allen's Gallery
646 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
550 viewsThese spring steel washers will prevent any galling of the clamping nut, even when it is tightened with great force.Jim AllenSep 27, 2007
569 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
366 viewsJim AllenSep 27, 2007
472 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
481 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
444 viewsThe collet holding fixture is made of #316 stainless steel & is not hardened. Jim AllenSep 27, 2007
426 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
529 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
789 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