CubCrafters Ventral fin install

[GreggG]

Does anybody have any documentation or knowledge on how the ventral fin on the EX-3 is installed? Engineering drawing? Pictures? Ideally I would like to weld a tab on before cover. That area gets a lot of spray.

Thanks,
Gregg

4AF01645-DF5E-4FF9-9988-9DCF8E0D6D49.jpeg

[Mark Albery]

It's in the EX dropbox folder under miscellaneous and Float Installation.pdf.
I presume it won't have changed for the EX3.

[GreggG]

Are you able to send me the Dropbox link for the EX? I only have the EX3 link and there isn’t a float manual in the misc. section.

Thanks,
Gregg

[Mark Albery]

I'll email you the PDF. I understand CC are not keen on sharing their dropbox links. Though I expect they would respond to your personal request.

[GreggG]

Great. gregg dot guider at gmail. Thanks! I tried my old EX1 link and it didn’t work.

[Mark Keneston]

Guys Ventral fin on bottom of fuse was used on the Sport Cub CC11 with Baumans and is part of the drawing. There is none noted for the CC11-160 or CCK with 180HP on Aerocets. There is one however for the Top Cub, CCX EX/FX3 and the XCub with either Claymar or Whips. I have experience with all of these recently.

The only potential issue Cubdrvr2 notes is beaching, and that only an issue if the terrain is tail high.

Yankee1

[Cubdriver2]

Ventral fins are butt ugly and limit where you can beach your aircraft heel first. It's difficult enough without the fin to pull your tail in even on a beach with a steep bank, add shoreline brush and rocks and your never going to play or camp where you want with a bottom fin. I would check the flight stability before adding one

Like this



Glenn

[Pete D]

No welding required, the ventral brackets are designed to bolt in to a covered airplane.

[David H]

Pete,

Is this fin needed on an EX2?

I am planning for floats this fall and have seen CC cubs on floats with and without this ventral fin.
I plan on Clamar 2180 amphibs, I am 1865lb EX2

Thank you,

David

[GreggG]

No welding required, the ventral brackets are designed to bolt in to a covered airplane.

From this drawing it looks like you need at least an Adel clamp installed before cover. I was hoping to weld tabs like I did with the water rudder pulley attach points. Does the ventral fin interfere with the inspection panel?
B2D3D83F-38A6-4D78-91BC-F8504364C506.jpg
21799645-1BBA-4411-9AB5-69D7A84668FB.jpg