Aircraft engine Options

[enf2232]

Anyone ever consider an aircraft engine swap? Saw the Youtube video and it made me wonder.

https://www.youtube.com/watch?v=6jMoXiQ11Bk

[Unobtanium-inc]

I've seen it the other way around, 914 motor in a gyro-copter.

[bdstone914]

I've seen it the other way around, 914 motor in a gyro-copter.

Does not look like a well planned design with no shrouding around the heads, cylinder or oil cooler.

[mb911]

I've seen it the other way around, 914 motor in a gyro-copter.

Does not look like a well planned design with no shrouding around the heads, cylinder or oil cooler.

Its a free air design which is very common in aircraft applications with no cowls. It is also cooler as you climb so that helps. Its the fast decents though that causes issues as it super cools the cylinders and shrinks them to the pistons. Btdt when living in that world. I rebuilt a few hundred engines while in the business.

[ClayPerrine]

I've seen it the other way around, 914 motor in a gyro-copter.

Does not look like a well planned design with no shrouding around the heads, cylinder or oil cooler.

Its a free air design which is very common in aircraft applications with no cowls. It is also cooler as you climb so that helps. Its the fast decents though that causes issues as it super cools the cylinders and shrinks them to the pistons. Btdt when living in that world. I rebuilt a few hundred engines while in the business.

I already said this in the original thread, I would not do that. The thrust surfaces in that engine are not designed for use with a propeller. It would tear them up rapidly. Aircraft engines have huge thrust bearings to take the load of the propeller pulling on them. The cases are much beefier, and they have dedicated mounts for the load. If you want to run an automotive engine, use a drive that both lowers the prop speed and transfers the load of the propeller to a strong bearing surface.

[mb911]

I've seen it the other way around, 914 motor in a gyro-copter.

Does not look like a well planned design with no shrouding around the heads, cylinder or oil cooler.

Its a free air design which is very common in aircraft applications with no cowls. It is also cooler as you climb so that helps. Its the fast decents though that causes issues as it super cools the cylinders and shrinks them to the pistons. Btdt when living in that world. I rebuilt a few hundred engines while in the business.

I already said this in the original thread, I would not do that. The thrust surfaces in that engine are not designed for use with a propeller. It would tear them up rapidly. Aircraft engines have huge thrust bearings to take the load of the propeller pulling on them. The cases are much beefier, and they have dedicated mounts for the load. If you want to run an automotive engine, use a drive that both lowers the prop speed and transfers the load of the propeller to a strong bearing surface.

Yes agreed.. also note the Rotax aircraft engines have gear reducers. Even the vw engines that they cut in half they typically add gear reduction of some type. I use to travel to EAA events and give presentations on this.

[76-914]

I've seen it the other way around, 914 motor in a gyro-copter.

Does not look like a well planned design with no shrouding around the heads, cylinder or oil cooler.

Its a free air design which is very common in aircraft applications with no cowls. It is also cooler as you climb so that helps. Its the fast decents though that causes issues as it super cools the cylinders and shrinks them to the pistons. Btdt when living in that world. I rebuilt a few hundred engines while in the business.

I already said this in the original thread, I would not do that. The thrust surfaces in that engine are not designed for use with a propeller. It would tear them up rapidly. Aircraft engines have huge thrust bearings to take the load of the propeller pulling on them. The cases are much beefier, and they have dedicated mounts for the load. If you want to run an automotive engine, use a drive that both lowers the prop speed and transfers the load of the propeller to a strong bearing surface.

Yes agreed.. also note the Rotax aircraft engines have gear reducers. Even the vw engines that they cut in half they typically add gear reduction of some type. I use to travel to EAA events and give presentations on this.

We may have crossed paths at some point Ben. I was pretty active in the EAA years back. (IMG:style_emoticons/default/idea.gif) There was another design on the 1/2 VW that kept the case intact and used the front 2 cylinders only. The back half was used for mounting purposes. A guy in TX (Leonard something or other) used that design in his "Legal Eagle" ultra lite. IIRC, he called his engine design, "Don't cut that other half". (IMG:style_emoticons/default/beerchug.gif)