I was just wondering if anyone had any tips about how to mount a OS .15 C/L engine onto a new Guillows Corsair model kit?......as I already have both. What I'm really looking for is the most efficient way to mount it w/ a muffler w/out having to cut away that much of the structure or the cowling. Thanks in advance for the suggestions

64stang

That model may only need an .049 or .061 to fly...the OS-15FP can typically fly a 30" to 36" span model. I had a sterling Corsair with a 36" span with an OS-20FP and it flew great, but the structure as much stronger than the typical guillows kit. I believe the guillows kit was originally designed for rubber power.

Good luck

clscale-rcu

I was actually thinking about putting 1/16 sheet balsa on the body and maby the wings/tail..............Hoping that it would then be strong enough to accept the OS .15. What do you think................? [sm=confused.gif]

I converted a Guillows Corsair to .049 C/L'er about 25 years ago. Looked great, flew well, but the first rough landing turned it into tooth picks. Try something like this......John

I sure would like to get those plans,or a copy. JOHN anyway that you could scan them for me???DAVE B.

Actually the Guillows Corsair has a 30 1/4 in wingspan..........so maby an OS .15 might be okay for it???

My mistake stang, I used the smaller one, think it was 16 or 18" span

64stang,

It can be done but remember you are converting a rubber model that is structured for lightness to a model that must withstand much more stress and vibration.

I would suggest putting some drafting vellum (or equivalent) over the plans and redesigning the plane. Formers can be where they are now but you should go with the 1/16" planking as planned. You might want to use 3/32" or 1/8" on part of the sides to support the engine bearers or plastic mount. A plastic mount would be easiest, with a 3/16" firewall.

The wings will need to be redesigned for more stress due to more weight and maneuverability.

The stab and elevator must be greatly reinforced. You are no longer just using trim tabs.

For goodness sake, don't try to just add an engine and controls to a rubber model.

I guess I'm suggesting building a plane LIKE the kit. Then perhaps build the kit as a rubber model.

Of course this is only a suggestion. You have the kit and the engine, and must make the decisions. Good luck.

George

The easiest would be to just keep the rubber powered kit and get a kit that is made for what you want it for. There are several Corsair kits on the market. DOC Holliday

Hi,
I actually got the idea to convert the Guillows Corsair into a U/C airplane from this site......... Look at this-->

http://www.rcuniverse.com/forum/m_12...tm.htm#1682832

I know that the one above is an R/C airplane, but I'm on a budget and already know how to fly U/C. Anyway, why is it that everyone says it can't be done??? I mean if one person can do it, I think that it can be done again! Anyhow, I'm not looking to start a fight, I just want to find out the facts. If anyone has converted this airplane before, I would really like to know what you did to make it airworthy. Thanks.

64stang

64stang,

Of course it can be done. On the article you site, scan down to about 11/22 and look at the plane closely. He sheeted the bottom of the wing for strength and added 1/16" strips between the stringers on the fuselage. He also made reference to strengthening the empennage.

I would still modify the engine mounting area for extra vibration and stress.

Let us know how you progress with it.

George