swixtt

Hello,

i'm building up a new plane here and had bought a Dave Brown 90FS motor mount a while ago thinking that it would fit the Saito 100...but it doesn't. i've even seen photos of the 90FS working with that motor. have they changed the sizes of either of those two products? Do you know what size WOULD work?

thanks

outssider

My Feedback: (23)

it should fit. it's ok if you spread the rails a bit...iv'e used it on both the os 91 and saito 100.

swixtt

so it's OK to spread them so the engine fits snug in between the rails? i've always thought you only wanted it touching on the rails??

anyway, thanks for your reply... i guess it's a normal way for that engine to fit!

Wayne22

My Feedback: (2)

I tried that combo for fit today, and it is tight. What I would recommend is to take a dremel drum sander, and remove material from inside the beams so there is no pressure against the engine mount beams. Forcing the beams apart puts side stresses on them which they are not really designed to take. Those arms will break if enough stress is put on them ..don't ask how I know this......

swixtt

hey nony,
what's the next size up that 'would' more or less fit. it seems like it might be almost too much to shave off and then how much would be left for real strength???

my main problem is i do not have any hobby store around to test this out. i have to order everything when i need something. any additional thoughts would be great.

thanks

carlosponti

My Feedback: (1)

i think the saito 100 is the same case as the 91 but bored out more and a bigger piston. you could probably find the dimensions for it on horizon hobby's site.

khodges

My Feedback: (1)

Okay, I'll ask--how do you know that? I'm also using the D.B. 90FS mount with a Saito 100, and haven't had any problems......yet. I have at least 5 or 6 hours of run time on this combo. Did yours just finally fail, or did it take a lick on the nose to help it out?

swixtt

did you modify your rails at all? or just squeezed it in between?

scratchonly

Dimensions for all saitos should be in your owners manual.