Learn - How to Cut a Carbon Fiber Spinner for a Propeller

How to Cut a Carbon Fiber Spinner for a Propeller
When cutting your spinner, special techniques must be employed. CF does cut pretty easily, especially compared to aluminum! There are two methods.
WARNING: When you are cutting CF, don't get the dust on you. Especially don't breath it. Do it outside even if you have a vacuum cleaner! While it won't kill you, your skin will itch and drive you nuts! If you breath it, you will cough for the rest of your life and you will want to die! REALLY!!
1) Bolt the propeller in the proper position to the backplate. You will need a 10mm bolt about 75mm long. Rotate the prop so that the trailing edge (TE) is just a tad in front of the screw tabs. See below.

2) Mess around cutting a piece of heavy paper so that it looks right on the prop. Leave a little gap. See below.
3) Mark the position of the forward mounting screw on the paper as shown below. You will use this mark as a reference to transfer the slot to the correct position on the spinner by putting this mark onto the hole in the spinner cone. See below.

4) Transfer the slot onto the cone using a heavy black felt marker. Don't screw this up! :)) See below.

15) Get a rag, a dremel with the two different sized sanding drums (9/16" and 5/16"), and a fan. Go outside and set up the fan. Hold the spinner in the wind of the fan and use your large drum, grind away! Wipe the dust off the spinner with the rag every so often so that you can see what you're doing.
16) Once you've ground up to and including the line (using the small drum sander if necessary), then test fit the cone onto the backplate with the prop bolted to it. Fit and sand and shape as necessary to get an even gap all the way around.
17) Order new cone and try again.
It's actually not that hard. It should take you about 2 hours the first time and 30 minutes the second time.
WARNING - Gasoline and Turbine powered R/C model aircraft are not manufactured to withstand unlimited G's. Any R/C model aircraft can fail, be it a wing folding up or a fuselage breaking in half under too high of a load. Just as any full size aircraft, model R/C aircraft have a maximum G rating. Because you are not in the plane flying it and experiencing the G's and reading the G-meter, it is more difficult to judge the G's on the aircraft, and it is very easy to exceed the limits of the aircraft. Understand that if you perform a snap roll, parachute, wall, blender, knife edge loop, or pull hard on the elevator at almost any speed, you can be putting in excess of 15 G's, even in excess of 30 G's, and most aircraft can only designed to take 10-12 G's. If you perform any violent maneuver, you can break your plane. When I perform hard maneuvers, especially for the first time on an airframe, I am prepared for a failure and am prepared for it as best I can be. This mainly includes performing the maneuver far enough away from spectators that in event of a failure that I am not endangering others. In addition, be prepared for the manufacturer to not pay for a new airframe which is broken during flight. It is common practice for any manufacturer to not replace an airframe which breaks in the air or upon landing. I have only seen manufacturers replace airframes when they have received many of the same failures and the manufacturer determines that there was a design or manufacturing error. If you break an airframe, and you are the only one to do so, then it is probably not the fault of the manufacturer. Please fly safely, and avoid full throttle operation other than at low airspeeds.
R/C model jets, warbirds, aerobatic planes and UAV Unmanned Aerial Vehicles to name a few are not a toy! If misused, it can cause serious bodily harm and property damage. Fly only in open areas, and AMA (Academy of Model Aeronautics) approved flying sites. Follow all manufacturer instructions included with your plane, radio, servo's, batteries and engine. Aircraft manufacturers guarantees each kit to be free from defects in both material and workmanship at the date of purchase. This warranty does not cover any component assembled by the customer. All parts of high stress must be inspected and reinforced if necessary by a competent builder. Some parts should be glued again. High stress areas such as firewalls, motor boxes, wing mounts, landing gear mounts, etc., are areas of high concern. Seek help if necessary. In not case shall TBM be liable for the cost of any product it offers which is not manufactured by TBM. The liability to the manufacturer cannot exceed the original cost of the purchased item. Further, TBM reserves the right to change or modify this warranty without notice. In that TBM has no control over the final assembly or materials used for final assembly, no liability shall be assumed nor accepted for any damage resulting from the use by the user of the final user-assembled product. By the act of using the user assembled product, the user accepts all resulting liability. The kit manufacturers have provided you with a top quality, thoroughly tested kit and instructions, but ultimately the quality and fly ability of your finished model depends on how you build it; therefore, we cannot in any way guarantee the performance of your completed model, and no representations are expressed or implied as to the performance or safety of your completed model. It is the user's responsibility to inspect each component for worthiness.
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