ROJETT Weights

[John Leidle]

  Does anyone know what a ROJETT  76 & or 65?
  John

[Steve Helmick]

The RO-Jett .76 is 355.5 grams (12.54 oz) with the two header screws, but no header, no spinner, a standard prop nut and a rather small washer. 

As I understand it, the .65 isn't made anymore, but the .61 is, and a newer .67 is apparently built on the .76 case.
  Steve

[Balsa Butcher]

Actually the .67 is built on the 61/65 case but has a larger cylinder. Interchangeable, mount wise with the 61/65s. When I get 'roundtuit I'll dig mine out and weigh it. Should only be slightly heavier than the 61/65s.

[Steve Helmick]

I wonder if Dubby could convert a .65 to a .67? Tho most .65's got converted to .61's, the 2-piece barstock cases might give some options. Dubby converted a .76 side exhaust to rear exhaust for me, and pretty inexpensively.  Steve

[Dave_Trible]

The .65 is/was a .61 sleeve bored larger.  The issue was the sleeve got too thin with the .65 with really no more power.  I doubt a .67 is viable with the .61 sleeve.  I would be inclined to stick with the proven designs that have been de-bugged.  I've not used the .67 but consider my BSERE .40s, .61s, and .76s the best engines I have.  That .40 I think would make the best Classic engine you could get.  Awesome power in a .25 sized case.  Very light.

Dave

[John Leidle]

   Hi Dave ,  I believe the .67 is a stroked . 61  ,,,not gonna bet my SSI check on it but I believe that is what they did. I going to order a .76 today,  thank you for your help.
  John

[FLOYD CARTER]

The RO-Jett 76 and the RO-Jett 61 both have the same mounting dimensions.  I built a couple full body planes for the 76, but later dropped in a 61 (complete with 2 1/2" spinner) without modifications to the plane. (the balance was better!)

Floyd