Machined Ring Gear For Use With Low Profile Front Starter Kit
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My Ring Gear is a modified Ford Taurus flex plate. The Ford part was selected because it offers a unique combination
of light weight, stiffness, small diameter and correct offset. Each Ring Gear, Part No. FS-7, starts out as a brand new part. The center is
precision machined to mate with the Hub, and it is drilled for six AN-3 bolts to mount it. When you receive it, the Ring
Gear is ready to be bolted on the motor with no further work required to this part. Although it can be further balanced,
I checked 20 of them and found the manufacturer's balance to be extremely good. My earliest front starters used Nissan
Sentra flex plates. At 2 pounds, 12.8 ounces, the Ford Ring Gear is significantly lighter and available at a dramatically lower cost. This new Ring
Gear supersedes all previous recommendations, and is now the new standard for all Front Starter Systems.
The $99 price includes instructions (reprinted below) and shipping in the U.S. I accept payment by check or money order in U.S. dollars payable to
William Wynne, 5000-18 HWY 17 #247,
Orange Park, FL 32003, or credit cards via PayPal by clicking below:
For international orders, including Canada, please add $25 for S&H by clicking below:
Please print, complete and return a Liability Statement with all orders. These are available for printing at the Liability Statement Page.
Thank you for your order.
Ring Gear Instructions - For Use With Puck and Black Hub;
(Gold Hub Instructions Include Separate Directions For Installing This Ring Gear)
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Thank you for buying a Ring Gear, Part No. FS-7. Your purchase makes possible my further research and development on the Corvair. In this way, you’re investing in the future development and perfection of your chosen motor.
These notes are supplementary to my most current Conversion Manual. This Ring Gear is developed as part of the system that we use to convert aircraft motors. This system is outlined in the Conversion Manual. The parts alone, without the information contained in the Manual, will not allow you to develop as reliable an aircraft conversion. When I develop and market a part, it is fully flight tested, and designed to work in concert with the other parts in the conversion. I take into account the way that most people are capable of installing and operating the part. There’s a great deal of consideration that goes into these issues, and I urge you to utilize all the information in the Manual and the parts in the way that they are intended to be used. Of course, contact me at any time with any question you may have.
To be fair, everyone needs to understand that these are not certified parts, and it's not a certified motor. Experimental is not a misnomer; everything we do in this field is of increased risk. If anyone even suspects that they have a problem, E-MAIL or CALL ME. If you have never worked with torque wrenches and precision fasteners, get help from an A&P. Let's all remember to use our heads and not take unnecessary risks. I have gone to great lengths to make these components as reliable and easy to install as possible within the bounds of affordability. I have personally flown all of these parts, because I have a low opinion of people who market aircraft parts without flying the parts themselves. I believe that each and every part I sell is the best solution to its respective aspect of converting a Corvair engine. Take your time and do good work. The system is proven and will reward you with the same type of reliable flight performance we have always had.
Ring Gear
This Ring Gear is completely machined and ready to bolt on to your motor. However, I suggest that you first clean it and paint it the color of your choice. The Ring Gear by itself will get a light coating of rust without some type of protection.
This Ring Gear’s original application was a Ford Taurus. It was selected from countless other ring gears by virtue of having the right combination of weight, stiffness, offset and availability. Although we had previously used Nissan ring gears, these Ford Ring Gears are the last word in Front Starter Ring Gears, and supersede all previous designs. All of the engines I have built in the shop since 2002, and all of my personal engines, all have this Ring Gear.
It may not be obvious at first glance, but the Ring Gear is bolted on the propeller side of the Puck. The original Puck has square corners on the flange faces. All Pucks that are compatible with this Ring Gear will have a heavily radiused front face. This includes all the Pucks I’ve sold since 2002. If you’re making your own puck, make sure that you’re working from the drawing dated 2003 showing the radius. Other than this detail, the Puck has not changed since 1996.
The Ring Gear is bolted to the Puck using appropriate length AN-3 bolts. These will either be -6 or -7, depending on whether you’re using a Front Alternator Pulley. To ensure that your Ring Gear is concentric with the crankshaft, and is not interfering with the fit between the Prop Hub and the Puck, follow this assembly procedure: Put the Prop Hub on the bench, propeller side down, and slide the Ring Gear over the 3" boss on the back of the Prop Hub. The offset on the Ring Gear will face forward, toward the propeller. Then, install the Puck into the back of the Prop Hub. When these are completely mated, it will then allow you to install the AN-3 bolts, and the Ring Gear will be held concentric to the assembly.
Thank you. Happy learning, building and flying.
