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Guillows Series 200 - Fokker DR-1 Triplane by danrc. Viewed 1262 times.
Build Thread
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| Image Comments |
| danrc | 18-Jun-08 12:24 | | In flight |
| SteveM | 18-Jun-08 14:47 | | James reported that his DR1 was a handful to fly, did you have any trouble? |
| RodN | 18-Jun-08 23:07 | | Nice photo of a nice build Dan. |
| danrc | 19-Jun-08 09:32 | | It is a tricky plane to get into the air, that's true. I had a couple pseudo flights before this one. Each was truncated for a couple reasons. 1) This plane needs a shim put on the leading edge of the horizontal stabilizer to increase downward pressure, otherwise it will porpoise (this led to a cracked cabane on flight #1) 2) Thrust is essential but don't over-do it on the prop size. I had an 8x4 sf prop on a welgard 2204 motor but it made the plane's responsiveness a little soggy, so I put it down. This again led to a cracked cabane and landing gear assembly. I replaced the landing gear with a wire system that I can remove and sized down my prop.
The next flight was the one you see here. Take your time with this build, there are a few folks out there that should take all the credit, I just followed in their footsteps. |
| danrc | 19-Jun-08 09:56 | | When it's trimmed properly it flies like a dream. It feels like I'm flying a plane 3 times its size based upon the wing area. |
| jgood | 19-Jun-08 10:14 | | That's interesting, Dan. My flights were certainly a little scary, I felt lateral control was minimal. Did you resize the rudder at all? What was your AUW? |
| danrc | 19-Jun-08 11:06 | | Hi James, I was hoping you'd jump on. I used your build thread as reference as I built (Thank you!!!). You may be amused by this, I did not resize the rudder and I tend to fly without it on all of my models, this one included. With my pull/pull ailerons I get a considerable amount of throw, which I cut down to around 70%, but may still need to cut a little more off. I don't know if you can see, but I added some length onto the ailerons but did not build them up as I probably should have. I noticed a little bit of a 'knife edge' on left hand turns but that was due to a sagging aileron control line that I remedied after the flight. I'm embarassed to say that I don't know the AUW. I'll check that this evening. I was going off of assumed numbers for the airframe with litefilm (?), engine (21 grams), 3 servos (5g each) and esc -7grams. The engine is from grayson hobby. It tows my micro telemaster and my brother's glider around with authority and it is closer to a Park 300 than a 250 in output and thrust. I flew most of the time at around 1/2 to 2/3 throttle. It climbs very well at that rate.
I was amused that this plane soared as much as it does as well. My landing was unbelievably smooth. |
| danrc | 19-Jun-08 11:12 | | Hi James, I was hoping you'd jump on. I used your build thread as reference as I built (Thank you!!!). You may be amused by this, I did not resize the rudder and I tend to fly without it on all of my models, this one included. With my pull/pull ailerons I get a considerable amount of throw, which I cut down to around 70%, but may still need to cut a little more off. I don't know if you can see, but I added some length onto the ailerons but did not build them up as I probably should have. I noticed a little bit of a 'knife edge' on left hand turns but that was due to a sagging aileron control line that I remedied after the flight. I'm embarassed to say that I don't know the AUW. I'll check that this evening. I was going off of assumed numbers for the airframe with litefilm (?), engine (21 grams), 3 servos (5g each) and esc -7grams. The engine is from grayson hobby. It tows my micro telemaster and my brother's glider around with authority and it is closer to a Park 300 than a 250 in output and thrust. I flew most of the time at around 1/2 to 2/3 throttle. It climbs very well at that rate.
I was amused that this plane soared as much as it does as well. My landing was unbelievably smooth. |
| danrc | 19-Jun-08 11:16 | | Hi James, I was hoping you'd jump on. I used your build thread as reference as I built (Thank you!!!). You may be amused by this, I did not resize the rudder and I tend to fly without it on all of my models, this one included. With my pull/pull ailerons I get a considerable amount of throw, which I cut down to around 70%, but may still need to cut a little more off. I don't know if you can see, but I added some length onto the ailerons but did not build them up as I probably should have. I noticed a little bit of a 'knife edge' on left hand turns but that was due to a sagging aileron control line that I remedied after the flight. I'm embarassed to say that I don't know the AUW. I'll check that this evening. I was going off of assumed numbers for the airframe with litefilm (?), engine (21 grams), 3 servos (5g each) and esc -7grams. The engine is from grayson hobby. It tows my micro telemaster and my brother's glider around with authority and it is closer to a Park 300 than a 250 in output and thrust. I flew most of the time at around 1/2 to 2/3 throttle. It climbs very well at that rate.
I was amused that this plane soared as much as it does as well. My landing was unbelievably smooth. |
| jgood | 19-Jun-08 11:21 | | I'll remove those dupe comments later!
That's all good information for me, thanks Dan. I need to get mine up there again. How big was your shim under the elevator leading edge? |
| danrc | 19-Jun-08 11:23 | | Sorry about the Dupes, my fault.
I put a small 1/32 spar under the leading edge, however I think it came out to closer to 1/16 after the glue set a little funny. If you weren't experiencing ballooning or seeing the need for excessive downtrim then you should be fine. |
| danrc | 19-Jun-08 11:24 | | The guillows conversion thread on Rcgroups has a long discussion about this plane. |
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