Eric, your web page is looking really well these days. Thank you for carrying my list of contact data for prop makers which used to be really hard to find. If you would like to freshen the list, here is the current version. Regards Brian Whatcott ----------------------------------------------------------------------- BW inet@intellisys.net Altus OK Dec 98 History: 12/06/98 Alphabetize Makers, Add contact info for Hoffman, new number for Ed Sterba ***************** Wood Prop Makers ***************** Culver Props Inc Galeton PA 814-435-1077 fax 814-435-6523 Aymar DeMuth 410-461-4329 Ellicott MD Felix Props Camp Douglas WI 800-776-7357 Hartzell 513-778-4388 Ray Heggy Mustang OK (doubtful address) 405-376-1551 Ted Hendrickson (scimitar props) Concrete WA 360-853-8947 Hoffman Propeller GmbH Tel: +49-8031-1878-0, Fax: +49-8031-1878-78 KŸpferlingstr. 9, wood/composites for vintage, homebuilt, airship etc. D-83022 Rosenheim http://www.hoffmann-prop.com Germany Brent Holomis 205-549-1102 fax 205-549-3769 Vernon, B.C. Canada asap@junction.net Hope Aero Propeller 905-677-8747 800-268-9900 fax 905-677-5935 Mississauga Ont CAN IvoProp Bellflower CA 800-for-prop 562-602-1451 fax 562-602-1374 LoPresti Synchropulse props 800-859-4767 561-562-4757 fax 561-563-0446 McCauley 800-621-prop Miller Aviation Propellers 800-288-4228 fax 607-770-0649 Performance Props Nogales AZ ????????? Prince Aircraft Co Whitehouse OH 419-877-5557 fax 419-877-5564 Precision Prop 801-789-3699 Prentiss Court 864-299-3929 fax 864-299-5015 Aeroworks NOTE:NOTE: Vintage Prop NOTE:NOTE: Greenville SC For Display Only Props Inc Newport OR 541-265-3032 Sensenich 813-752-3711 Plant City Florida Ed Sterba 941-778-3103 Florida -was- Delavan WI 414-728-1367 US Propeller Stockton CA 800-749-prop 209-982-4565 VPERED Moscow 095-273 4427 095-273 4428 FAX 095-273 3618 Machine Bldg Plant 2 blade pine, glass covered,painted Diam 73" wt. 11 lbs Warner 520-294-5671 Warnke Ray or ?????? Almost Const Speed Bernhard Texas??? Whirlwind 619-562-3725 Woodward 815-624-4400 *********** Wooden Prop Making *********** Eric Clutton 615-455-2256 Self-publish booklet Tullahoma TN "Propeller Making for the Amateur" Garth Hess small pamphlet "Propeller Carving" 881 Emory Ct. Upland, CA 91786 Gary Mc Gill, Prop carving machine PO Box 2566, Glendale, Az,85311-2566 Pietenpol video shows how to carve a prop $29.95+ $3.00 shipping. ***************** Prop Optimization Software ***************** Bates Engineering 530-622-1886 "Prop Optimizer" $95 Placerville CA ************ Prop Dynamic Balancing ************ Dynamic Solutions 760-744-0187 fax 760-744-8089 Systems - "Personal Microbalancer" San Marcos CA *************** Words Of Wisdom on Wood Props *************** Date: Fri, 11 Jun 93 16:20:25 CDT From: Dan Grunloh (GRUNLOH@vmd.cso.uiuc.edu) Subject: Prop Tips To: Ultralight Mail (ultralight-flight@ms.uky.edu) Message-ID: (9306112120.aa15852@s.s.ms.uky.edu) ---- PROP TIPS, some advice on care and feeding thereof ----------- In the area of safety as discussed recently re Daves bent tube, I thought I would post some notes I took at the 13th Annual Illinois Ultralight Safety Seminar held this year in Springfield. Prop Tip #1.. Paint your propeller tips WHITE not red for visibility. The red tips look nice standing still, but merge into grey when the prop is spinning. Propeller accidents are especially messy. #2.. If you propeller is mounted in front (tractor), paint the back side of the prop FLAT BLACK. This will improve visibility through the blurred prop arc, and reduce reflections when landing with your back to the sun. It should also help with the problem of a strobe light illuminating the prop when you are landing in those nearly dark conditions 30 minutes after sunset on an overcast day. Hairy! #3.. Balance your propeller often!! (once or twice per year) It can go out of balance gradually so you don't notice how bad it has become. Besides pilot fatigue, long term wear on all the engine and airframe components is an important consideration. #4.. Retorque the prop bolts at least twice a year. Wood props can swell or shrink and result in prop failure. Various charts of torque values have been published. Don't quote me, but I think our wood props on ultralights go about 14-18 foot-lbs. I prefer to torque by feel, (don't laugh) because with experience, you can get the perfect value for YOUR individual prop. The idea is that by going very gradually you stop just before the point where you begin to crush the wood. Then back off and retorque again. Use a torque wrench if you want and find out what values you are using. Torque composite props strictly according to the manufacturers specifications. #5.. If the prop cannot be made to "track" correctly you can try shims under the prop hub to straighten it out. Paper card stock is preferred to brass shims as it is less likely to slip out. (You track a prop by removing the spark plug(s) and turning the prop to measure from each tip forward or backward to a fixed point. Get it as close as you can but don't get too carried away. I had a prop which was 3/8 inch out of track so I shimmed it to turn correctly and then it exhibited a strange fluttering vibration in flight. Perhaps it's out of track when static but flexes under a load to come out OK. The proof is in the flying! #6.. To add some easy protection to the leading edge of your prop, add an epoxy leading edge. Mask off a narrow strip along the leading edge and paint on a couple coats of epoxy glue. #7.. According to the propller expert at this seminar, a wood prop should have at least 5 coats of varnish (polyurethane). With me, it takes at least that many before the finish starts to get really smooth when using cheap spray cans. If the varnish wears off you will get water damage and unsightly stains which are permanent. I found that old varnish can be removed by scraping with a razor blade or other sharp tool. Let one-part polyurethanes harden for a couple of weeks before polishing it. Dan J. Grunloh ------------------------------------------------ ************** Prop Hub Data Adapted From / Acknowledgments To Sensenich ************** Engine HUB HUB HUB BOLT NO. HOLE Manufacturer DESIGNATION THICKNESS BORE CIRCLE HOLES DIA. VW Flange 2.000 4.000 6 5/16 or 3/8in SAE #1 Flange or Tapered 3.375 2.255 4.375 6 0.375 SAE #2 Flange 3.500 2.255 4.750 6 0.375 SAE #3 Flange 4.000 2.255 5.250 8 0.375 SAE #4 Flange 5.000 2.255 6.000 8 0.438 SAE 20 Spline 41G2325-9 6.000 3.880 7.000 8 0.438 SAE 20 Spline 41G2325-6 5.250 3.880 7.000 8 0.438 Aeronca Taper 805 2.500 1.755 5.000 6 0.375 Continental SAE #0 Taper A3482 3.250 2.255 4.000 6 0.375 Continental SAE #0 Taper A3746 3.375 2.255 4.375 6 0.375 Continental SAE #10 Spline A40611 4.000 2.755 5.250 8 0.375 Continental SAE #20 Spline A4064 6.000 3.151 6.693 8 0.500 Lycoming Flange 3.250 1.875 4.375 6 0.375 Lycoming Flange 3.500 1.875 4.750 6 0.375 Lycoming Flange 4.000 2.192 4.750 6 0.375 Lycoming Flange 4.000 2.192 5.250 8 0.375 Franklin Flange 3.250 2.005 4.000 6 0.375 Franklin Flange 4.000 2.005 4.000 6 0.375 Franklin Flange 4.000 2.005 5.000 8 0.375 Franklin Flange 4.000 2.005 5.000 8 0.438 Franklin Flange 4.000 8 Uneven spacing Funk Taper 14 4.000 2.380 4.688 6 0.375 Jacobs SAE #20 Spline 90205 6.000 3.817 6.693 8 0.641 Jacobs SAE #20 Spline 6.000 3.443 6.693 8 0.500 Kinner SAE #1 Taper 610 4.000 2.692 5.250 8 0.375 Kinner SAE #10 Spline 1475 4.000 3.255 5.250 8 0.375 Kinner SAE #10 Spline 1475 4.000 3.255 5.250 8 0.438 Kinner SAE #20 Spline 1609, 42K14179 4.000 4.130 6.250 8 0.438 Menasco Taper Shaft 2016A 4.000 2.692 5.250 8 0.375 Menasco Propeller Model W80R 4.375 2.949 5.250 8 0.375 Rearwin Leblond #1 Taper 05057 4.000 2.692 4.625 6 0.438 Warner SAE #20 Spline 7900, 8530, 8599 4.125 3.255 5.250 8 0.375 Warner SAE #20 Spline 8808, 43D24385 4.125 3.255 6.188 6 0.375 OX5 SAE #1 Taper 4.000 2.692 5.250 8 0.375 Adapter Z5M8,Z10M8,Z16M8 3.63 2.25 5.50 6 0.500 Flange SAE #1 Flange 3.75 2.255 4.375 6 0.375 Flange SAE #1 Flange 4.25 2.255 4.375 6 0.375 Flange SAE #1 Flange 4.500 2.255 4.375 6 0.375 Flange SAE #2 Flange 3.38 2.255 4.750 6 0.375 Flange SAE #2 Flange 3.75 2.255 4.750 6 0.375 Flange SAE #2 Flange 3.88 2.255 4.750 6 0.375 Flange SAE #2 Flange 4.25 2.255 4.750 6 0.375 Flange SAE #2 Flange 5.38 2.255 4.750 6 0.375 Y Adapter SAE #4 Flange 5.38 2.255 4.750 6 0.375 ARP-502 Flange 3.375 2.255 4.375 6 0.500 Flange SAE #6 Flange 3.630 2.255 4.750 6 0.500 corrections to inet@intellisys.net Brian Whatcott Altus OK 12/98