I just ordered a 60 size R2 from Adrian Page. This plane was designed for a Saito 91. Considering a 100 is very close, I am trying to decide between the Saito 100 and an OS 91. Would there be an benefit of one over the other? Thanks in advance.
Just as a follow up, I am also considering some YS engines. This plane should be kept as light as possible and was designed to use a Saito 91. That Saito weighs 19.7oz and has 1.6hp. The 100 weights
20.8oz and has 1.8hp. The YS 91 weighs 26.4 oz and has 2hp. The YS 110 weighs 27.08oz and has 2.2hp. Now seeing how the plane was designed for 19.6oz engine with 1.6 hp, what would be the effect with using either of the YS engines at 26.4oz/2hp or 27.08oz/2.2hp? Is the added weight worth it? While speaking with Adrian about the plane, he has the Saito 91 on his and has the battery and receiver very far forward. Would I be able to balance this plane with one of the YS engines by moving the battery pack closer to the back of the plane without adding any additional weight? Would the YS engines be to much power for this plane? I don't know why, but I am a little leary of the Saitos as I have read a lot of threads that have a lot of negatives about their engines. At the same time, there are a lot of people that love them. I usually do a lot of research on the potentials and then go with the one with the best reputation, which usually comes down to which one has the least amount of negative comments about it. Please give me some suggestions.
I used a Ys .91 it was really rich almost to the point of quiting for its one flight. The plane flew fine for what little flying I did . I hit a bush on approach and cartwheeled on landing. I'm still waiting to rebuild it. Balance was fine. I tink mine was in the 8-9 lb range. Sparky
On 12/17/2003 9:23 AM Ted shuffled out of his cave and grunted these great (and sometimes not so great) words of knowledge:
As far as the Saito engines are concerned.....I have a Saito 72. I have had this engine about 2 years and have put about 2 1/2 - 3 gallons of
10% nitro through it.In this amount of usage I have had to do the following: Replace the glo plug after about 2 gallons of fuel, adjust the valves at that time also. That is it. I have not had one bit of trouble with the engine. Ran beautiful right out of the box, but did adjust the idle after about 1/2 gallon for a lower idle (idles @ 1775 rpm with a MA 13x6 prop on 10% Byron).
Power wise, it outperforms an OS 91 FS on an identical ARF.
Just my $0.02 worth.
PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.