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Old 05-13-2004, 07:10 AM
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Default RE: Hanger-9 Corsair ARF Mods for more Scale/ Accurate Appearance

John Rood, Yes, I am condsidering adding scale airfoil to tail feathers, shouldn't be to difficult. Keep in mind tho that this is a designed to be funscale, and much effort has been put into keeping this aircraft light. The end reasult is an easy to fly, simple, inexpensive warbird with retracts that altho lacking detail up close, has a pretty scale appearance in the air. Horrifying to some, welcomed by others.

Matt 22, I have installed the air kits (tank, valve, servo, etc.) on the wing of both my Top Flight Corsairs, and intend to do same here. The wings will be the focus of most of my first mods, but don't plan on seeing it in a day or so, maybe in mid June. BTW, I have tentatively decided to go with a set of RhomAirs that have been collecting dust for a few years now. These are nice retract,s but are no longer in production. If you can find 'em, get. Otherwise, I think the CJs are the way to go. Altho I like the Robarts for my Top Flight Corsairs, the Hanger 9 Corsair wing would require much more modification/ altering to slip in a set of 615s.


I have now recieved the kit and had a good opportunity to look it over.

First impressions are WOW! The wing tips have what appears a fairly accurate outline, definately more accurate than Top Flite 1/8 scale plans. Additionally, the tips as viewed from the front have the generally correct profile. That is: the top of the wing is in a straight line up to the tip, and the bottom curves up to meet the tip.

Hanger 9 advertises the ready to fly weight of this aircraft to be between 7 1/2 to 8 1/2 lbs. I weighed all components (trimmed the canopy first) and came up with just under 85 oz. I further computed that adding radio gear would add 14 oz. ( 6 Futaba S3003/ S3004 @ 1.4 oz. each, plus 3.2 oz for Futaba 600 mAh pack, plus 1.5 oz. for 127 DF rx, plus 1.5 oz for (2) 12" ext., (3) 8" ext., plus .5 oz for switch harness), which would bring the total to 99 oz. That allows 21 oz for engine, prop, spinner, glue, and short piece of fuel tubing, which would bring total to 120 oz., or 7 lbs, 8 oz. If 21 oz. doesn't sound like enough allowance for the above, consider that the Futaba 148 series recievers weigh just 1 oz, lighter battery packs are available, and there are some 1 oz. servo available which can do the job. Also, Saito has just released a .82 4 stroke, which they advertise as having the same physical size ans weight of the .72 (about 18 oz.). As a .72 powers my 8 lb, 10 oz Top Flite Corsair adaquately, I'm sure this new engine would provide plenty of power for the Hanger 9 Corsair.

The firewall appears to have about 2 deg offset for right thrust, 0 deg down thrust.

The wing is not sheeted aft of the main spar on the outer panels. Actually, the full scale Corsairs have fabric covered ribs on much of the outer panels, altho the rib spacing is much closer than the cap-stripped ribs on the H-9 Corsair. Regardless, this weight saving type of wing construction is easily altered, if the builder desires. In other words, converting the wings to fully sheeted should not be too difficult, if that's what one wants.

The fiberglass cowl is LIGHT, weighing just 93 gr. compared to 197 gr. for an un-painted Top Flite Corsair cowl. That's a difference of nearly 4 oz. It also is slightly oversized (diameter of cowl about 1/4" greater than fuselage diameter), and has molded in cowl flap lines, but they are not scale accurate. The light weight of it also makes it seem flimsy. I am leaning towards installing a Top Flite cowl on mine because I can make it more scale looking with it, and it would be able to absorb those occasional nose-overs better.

The included wheels are great looking! They are light, yet have a very scale, 8 spoke design on one side, very simular to the Robart scale hubs, which in turn are very simular to the hubs of U.S. fighters during WW II (Mustangs, Corsairs, and most others). Unfortunately, they are too small. Scale size is about 4", I like to use 3 1/2", and these are 3 1/4". I sure would like to see these wheels offered in bigger sizes, I would be buying lots of them. The tailwheel weighs 1 gram.

The included/ installed retracts have a lot of freeplay, 5/32" dia. struts (size generally used for .40 size planes), and leave a lot exposed when retracted. In fact, it would be very difficult to install functional gear doors with these retracts. Whereas I originally intended to use these included retracts, I am now set on finding an alternative.

The fin, rudder and stabilizer are balsa framework. If you don't like it, you can always remove the covering and apply sheeting. Ailerons and elevators are shaped balsa.

The individual pieces are laser cut, and it looks as tho this would be an excellent kit to build. Unfortunately, like most ARFs, they are bonded with what appears to be a hot-melt glue. This type of glue is heavy, yet does not bond all that well. The glue is no doubt at least partially responsible for the firewall failures, which have been reported by others in RCU with H-9 ARFs.

Wing attachment bolts/ blind nuts, as well as most other (all?) bolts are AMERICAN (not metric, as in every other ARF I have ever owned). Wing bolts are 1/4 x 20 Allen bolts, just like the size we usually use. I will however, be substituting the included 20 gr./ pair allen bolts for a pair of 3.5 gr./ pair nylon phillips screws.

The wing appears to have 0 degrees of incidence, whereas full scales have about 2 degrees of positive incidence. I like a small amount of positive incidence: it makes a model easier to set up for landings and slow flight.

Lastly, the bad news: the wing center section is very wrong (see picture in this post). The problem is that this section, which is parallel to the ground (horizontal), extends beyond the fuselage by as much as 5/8" on each side at the trailing edge. The completed left and right wings are then attached to this piece, and appear to be correct, BUT the exposed area of the center section should not be exposed. Up until the time I discovered this, I believe that it would be fairly easy to transform this ARF into a fairly scale looking Corsair, but this seems to really complicate matters. In fact, I considered giving up and just making this this fun scale Corsair that it was designed to be. But then, better sence got ahold of me, and I decided that a Corsair worth building is worth building right!
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