|Jun 03, 2013, 02:38 AM|
College Park, MD
Joined Sep 2002
Esm fw-190 d9
This model has been around for a while, but I just finished mine recently so I thought I post a tread. For starters, the kit is what most warbird enthusiasts would call sport scale, so I didn't bother adding much scale stuff to it. My goal was just to get it in the air and fly the wings off of it. I fly mostly electric, but this bird is so big, I just couldn't justify yet another plane I took to the field and fly a couple times per trip at less than 10 minutes a flight.
The model went together very easily. The wings are joined as one, and the horizontal stabs get glued onto the fuselage along with the rudder. It uses all pull-pull for the tail surfaces, and I find that a plus. I got the kit used and the stock tubes for the pull-pull wires in the aft fuselage were cut away to use as a pushrod system. Why, I don't know, because I think pull-pull offers much less slop and better overall control. I might have cut the tubes away anyways, as they seem to line up fine without the tubes.
The only difficult part of assembly was separating the gun hood from the fuselage to use as a hatch. The gun hood was made out of plastic, and glued in place. Why they didn't just make it out of fiberglass is beyond me. I would have been more than willing to purchase one as an extra part if they had.
I scratch built an instrument panel hood and seat back with armor. They are nothing special, just balsa and plastic. An excellent scale full cockpit is available from Ty's Planes. Given how much lead I had to add to the nose, I don't think I'll be installing a full cockpit anytime soon.
I used Hitec HS-985MG servos for the ailerons, and elevator, and HS645-MGs for the flaps. I got a DX8 as a gift recently, so I used the AR8000 as the receiver. I haven't installed the telemetry module yet, but plan to in the future.
I opted for the XYZ 53cc twin gas motor. It has run great so far and spins the Vess Aero 22B prop at 6800 RPM on the ground. It fits within the cowl with the exception that the spark plug boots bow the cowl outward slightly. I cut out a little of the fuselage front rim behind the cylinders to get as much air out of the open cowl flaps as possible, and it seems to work fairly well. I bought a 4.5" aluminum spinner for the model from SDSHobby. It's not an exact match for the shape, but it's close enough for me. I splurged on Iridium sparkplugs and they seem to work at least as well as NGKs. The boxer motor design allows it to run very smoothly, and give fairly decent power.
The stock ESM electric main gear retracts work well. The stock wheels were a little small for my liking, so I substituted a pair of Williams Brothers 5-1/4" balloon wheels instead. The tail retract took some modification to fit. I had to toss the stock tail wheel retract mechanism and used a small electric main retract to actuate the stock tail wheel frame. The result seems plenty strong enough, and has a nice scale like retract motion.
The model flies terrific. I had to add about 2 lbs of lead to the firewall to get the model to balance at 155mm, the location mentioned in the manual. Mine flies a little tail heavy at that location, so I added another 6 ounces for good measure. The elevators are still a little below neutral at cruising speed, but the model flies level inverted, so I think I've hit a sweet spot. At slow speed with full flaps the model flies surprisingly slowly for such a big model. Most of the warbird guys tell me they expected it to stall at any moment the first time they see it land.
Here are some videos I took of the model on the ground:
I don't have a video of mine flying, but there are already a bunch available to view. Here is one with the same motor:
It's available from the usual ESM dealers: Troybuilmodels, ARFPros, VQWarbirds, and probably others.
|Jun 03, 2013, 07:51 AM|
Nice to see another one flying. I dont think your giving ESM enough credit here for scale outlines. While its not a Miester scale plane, it is rather close to accurate. Sport scale just doesnt give it enough justice. For an ARF...its definitely the best 190 on the market that doesnt cost $2000 just for the airframe.
Anyway.....mines electric....on 65cc rimfire, 12s 6000, 20x14 2 blade. I have another D9(from Vantex) that Im putting an eme55 gasser in it.
I had trouble getting the gun hood off as well...I added fiberglass to the underside once removed.
My plane has the TY cockpit, full figure pilot, a good amount of weight up front for balance(lots of rx batteries, fan units internally to blow air out the open custom made exhaust stacks..etc.
It STILL floats like a trainer on landing. Mine is at 24 pounds and could easily handle another couple of pounds without any noticeable difference.
|Jun 03, 2013, 07:40 PM|
College Park, MD
Joined Sep 2002
kahloq, I've learned that as soon as I start claiming something is better than sport scale, out come the rivet counters, and this model just doesn't hold up to close scrutiny. The biggest peeves of the scale crowd at my field are the tail surfaces. While the verticals are squinting scale-ish, the horizontals are not even close. More like beer goggle scale. Which is why I'm perfectly happy calling it sport scale.
I dig that you went electric with your ESM D9, do you have any video of it? A club member who had a run-in with a three blade carbon fiber prop and now shies away from wet motors saw my D9 and now wants one badly. He had a smaller scale D9 he loved, and now wants another one. I told him I'd build it for him, but he's still on the fence. If he had video of one flying he might make up his mind.
Mine tips the scale at 24lbs dry, and it's a supreme floater. On the RCU ESM D9 thread someone was complaining the wing loading was high. In truth it could stand to be a bit higher.
|Jun 03, 2013, 08:00 PM|
Agreed...I think the weight should be a bit higher. In fact, I had to ADD weight just to get it to land otherwise it would just float on by for 600 ft with zero throttle.
Yea..the vertical stab is a bit thick, however, those that are supreme rivet counters would be taking a year or more to build a meister or dave Anderson kit. There is one super scale gasser guy that's mostly into german planes and he was quite pleased to see my ESM D9. Not that he was saying its super scale, but, he didn't sit there and point out little tiny nit picks about it either. He was just happy to see a giant size D9 at our field.
The ESM is far and away better scale outline then the thing KMP tried to offer a couple years ago. I actually have one of those, but its actually made by Vantex in china and KMP had no real input on the design at all. In fact it was already being sold in the fareast and Europe before KMP ever claimed it was their "signature series" or "model of distinction". That one Id definitely say was sport scale, however, I'll fix a lot of the issues with it and try to make it appear somewhat decent.
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