Category Archives: Prop

Engine Prop ShowPlanes Cowling

ShowPlanes Cowling Work

March 17th to 23rd, 120 hours

My dad and I mostly worked on the baffles and cowling top and lower halves. What a surprise this was to me since I had thought this was going to be much easier than it is.

My dad started working on the MotoPod, exchanging two plates that were incorrectly supplied to us. He placed the cable covers on and lubed the cables just prior to closing it all up. He then moved on to pulling off all the blue protective tape on the wings that had been there since we received the parts.

We then both started working on the top and bottom cowl halves since it was easer to work using two people. I had purchased SkyBolts for the top firewall half and drilled the final mounting holes in the cowling. Sadly I realized after it was to late that I had not properly positioned the cowling so I had to fiberglass the holes back full and start over again. The Show Planes cowl is a great product and easy to work with and is easy customizable. It was required that I grind off several places where the Skybolts back plates mount so they would set properly. While I was working on cutting the cowling my dad started installing the Plane Power Alternator, 70 AMP. He then moved over to installing the AC Compressor. He looped the drive belts around the ring gear and alternator but could not get them around the AC Compressor. It was later realized the AC Compressor that we had (Alpha I believe) had a larger pulley on it than what is currently shipping from FlightLine AC. Flightline promptly shipped a new compressor out to me. Sadly we could not mount the compressor so we could further work on the left side of the cowling air inlet ramps.

I started concentrating on the right side air inlet ramps. With the ShowPlanes cowl there is a special inlet scoop that comes from the left and right side down to the engine fuel servo. I though the right side would be easy….. well not really… but I am figuring out how it should have been thus making it much easier than how I was going about fitting it all. I figured it out how I wanted to make the inlet ramp for cooling air and engine induction air should be the only issue was how to hold all the movable parts together long enough to get an idea how it wants to be all attached. With everything in place and the bottom cowl on it makes for a rather tight fit. The instructions call for about 1/8″ clearance for engine movement. This seemed a little small so I increased the space and thus am having to rework fiberglass.

Meanwhile my dad was attaching the baffle rubber material as we had a good lower and upper cowl fitment and repeatability for mounting it all. The bottom cowl was attached using the hinge method on the side with one screw fastener on each bottom firewall point. The tope cowl got the Skybolts as mentioned above. And the lower inner portion that wraps around the landing gear had the pressure recovery mold attached to the airplane bottom with clecos and screw fasteners. This all created a good secure cowl for finishing the air inlet ramps.

Overall we had a good work week but we certainly have much more to get done before we are finished with the cowl and baffles.








Engine Prop Show Planes Cowl

Father and Son building time togather

Feb 28th – March 7, 150 hours.

This is the week my folks came up to welcome home Brooklyn. My dad understood what needed to be accomplished and went straight to work. He didn’t need much direction so I was able to spend time with my wife, son and new daughter before pressing on with the build. My wife REALLY wants her husband back and my parents completely understand that getting this RV10 finished will help my family.

My dad worked on baffling over the engine, I painted parts of it as he completed the first steps of the assembly process. We soon found at that we needed the cowling installed before we could cut the baffling down to size. We also started to realize how much modification and change from the plans the air conditioning system was going to drive for the baffling and cowling.

I worked on the preparing the wings for the final bolts to be installed. I messaged the wing to fuselage fairings for several hours getting them to fit properly. We then pulled the drift pins and installed the final bolts to hold on the wings. I had place a call into Vans because the bolts were bottoming out on the thread and the nut was being torqued against the shaft of the bolt. Vans advised use to add washers as needed. We did this to the NAS1309-58 bolts and still had many threads left on the bolt after nut was torqued. The NAS1306-58 bolts added also but only a single thread was left after properly torqued. I did order in “L” washers in case these needed to be changed. Flaps were final fitted and installed and rigged. Ailerons were removed to allow the removal of the blue protective covering and then reinstalled and torqued. I spent some time on balancing the control sticks and push rods for the ailerons. After some time i was able to get the ailerons and flaps aligned.

I attached the right wing tip to the wing and as I had hoped the wing tip aligned very nicely with the aileron.

My dad worked on the motoPod when he came upon questions for me when I wasn’t around, so he was very busy most all the time. He was able to rig the motoPod with all the cables and pulleys. The only thing still remaining is some cover plates need to be fastened to the pod. He even was able to attach it to the aircraft and operate it up an down.

Prior to the cowl work, I un boxed the prop for this first time. I attached the back plate of the spinner to the prop per the Hartzell instructions. I decided to place only one washer aft of the spinner plate and two washer forward. This way if I have and issue with clearance after the cowl is attached I can always move washers for and aft to make the spinner clearance work better. We hund the prop and only snug fit the bolts for inital cowl work.

One of the last things my dad and I did before my folks left for South Texas to return home was to attempt attaching the cowling. I am using the new Show Planes cowling and we are supposed to use the standard vans instructions to install it. Some of those instructions are applicable so I applied the ones I thought were needed and then used pictures of other peoples Show Planes cowling being installed. We were able to get the cowl on and trimmed to a rough fit. The rough fit is nearly perfect. I am now dealing with figuring out how I want to attach it to the aircraft. The cowling has a pressure relief cowling around the landing gear and so this still needs to be fitted since the cowling will be fastened to this inner cowling as well. We still have th induction intake and filters to install. The AC Compressor is throwing a HUGE wrench into how this part is installed since the compressor is in the same space the induction air inlet left side ramp is.


















Engine Prop

Spinner (D-7709P) and prop gov arm (C-4582-P)

Today I received the prop spinner (D-7709P) and prop governor arm (C-4582-P) from our local prop shop, R&D propeller located in Pearland, TX The spinner is special order since it is for the Show Planes cowling and it requires a ~15″ diameter spinner. While it wasn’t cheap it sure looks very nice in its polished state and in its 15″ size. I almost was set back when I noticed how large the spinner actual was. I hope it doesn’t look to big in front of the RV10.





Engine Prop

Prop Arrived

On August 5, 2013, the propeller arrived from Hartzell. This is the HC-C3Y1R-1N//N7605C a composite prop with a stainless core three bladed prop. I ordered it through Vans and it shipped directly from Hartzell.

The 15″ spinner will be coming from a local shop in Pearland, TX at Pearland Regional Airport. This is a polished spinner. The reason it is 15″, actually something more like 14.7/8″, is because of the Show Planes RV10 cowl that I will be using. I also order a control arm from Hartzell that will be sourced from the Pearland shop. The control arm is P/N: C-4582-P and the spinner part number is D-7709P.