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Ziroli DR-1 Triplane. - 8/6/2003 4:48:46 AM   
TLH101



Posts: 5510
Joined: 12/27/2001
From: Corpus Christi, TX, USA
Status: offline 		Well, it looks like my next major project will be a Ziroli Triplane, so I need some info on building and set-up. How does it build? What power works well? Are there any "kinks" in the building that I need to watch out for? How much nose weight did your set-up need? Any info will be helpful.
Thanks

_____________________________

Terry
"Old Fart" in training. (not to be an R/Cer, but to be an "Old Fart")
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Ziroli DR-1 Triplane. - 8/6/2003 4:07:33 PM   
vonJaerschky



Posts: 205
Joined: 8/25/2002
From: Comox, BC, CANADA
Status: offline 		The Triplane is not at all difficult to build, there are just a lot of wings, of course. I deviated from the plans for a more scale like appearance. Instead of lite ply fuse sides, I used built up construction from spruce. I also use 1/32 balsa cut in a triangular "dragon tooth" pattern on the leading edge of the wings to simulate the pattern you can see on the actual Dr1. One of the most important things is to make sure you get an incidence meter and check that all three wings are set at the angle indicated on the plans. And that goes for the 4th wing, too. That's the one between the wheels. I added quite a bit of scale detail, and it came out a tad heavy. I'm using a Quadra 35 for power, which is a good match. I still needed to add about 12oz of nose weight. I used Sig Koverall and dope for finishing. It looks awesome on the ground and in the air, I must say. I have pictures in my gallery. Feel free to contact me for more pictures and any questions.

(in reply to TLH101)
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Ziroli Dr.1 - 8/7/2003 12:23:10 AM   
Nickrc3



Posts: 402
Joined: 1/12/2002
From: Miami, FL, USA
Status: offline 		vonJaerschky,

What is the dry weight of your Ziroli Dr.1?

Check out my PhotoGallery on mine. Very similar specs.

(in reply to TLH101)
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Ziroli DR-1 Triplane. - 8/7/2003 12:31:30 AM   
Reg Hinnant



Posts: 297
Joined: 7/1/2002
From: Corpus Christi, TX, USA
Status: offline 		You wont need any nose weight, Terry. You always fly better if your planes are tail heavy..........
I've got some good pictures of a DR1 replica if you like.
Reggie

(in reply to TLH101)
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Ziroli DR-1 Triplane. - 8/7/2003 2:14:52 AM   
TLH101



Posts: 5510
Joined: 12/27/2001
From: Corpus Christi, TX, USA
Status: offline 		Reg,
You know when you are as good a pilot as I am, balance is "trivial"
May get with you on the pics when I get near ready to finish. This will be sport scale weekend flyer, not a show piece.
Thanks

_____________________________

Terry
"Old Fart" in training. (not to be an R/Cer, but to be an "Old Fart")

(in reply to TLH101)
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Ziroli DR-1 Triplane. - 8/7/2003 7:17:46 AM   
vonJaerschky



Posts: 205
Joined: 8/25/2002
From: Comox, BC, CANADA
Status: offline 		Nickrc3- I honestly don't know what my dry weight is. I'm guessing it's round about the same as yours ~20lbs. Way too heavy like you said, but not bad in the air. I had an ooopsy on landing about 18 months ago, and snapped the spars in all 3 wings on the right side. ( Turns out the potentiometer on the aileron stick in the transmitter was no good, resulting in an unwanted roll command on short final) I put here in the hangar for a while figuring it would take forever to repair. Well, I had a look at her again about 2 weeks ago, and the damage was not bad at all. I stripped off the covering as necessary, spliced the spars together, recovered, and painted this afternoon. Should be ready to fly again next week. I'll have to weigh it properly this time.

(in reply to TLH101)
       Post #: 6

Ziroli DR-1 Triplane. - 8/9/2003 6:36:31 PM   
vonJaerschky



Posts: 205
Joined: 8/25/2002
From: Comox, BC, CANADA
Status: offline 		Just a follow up. My Dr1 is repaired and ready to fly again. Weight is 20lbs without fuel. I wonder if WW1 pilots felt as nervous taking these things airborne as I do mine? :-)

(in reply to TLH101)
       Post #: 7

Ziroli DR-1 Triplane. - 8/12/2003 3:03:57 AM   
vonJaerschky



Posts: 205
Joined: 8/25/2002
From: Comox, BC, CANADA
Status: offline 		...and a post flight follow up. It flew great! Despite being 4lbs overweight and not having had air under it's wings for 2 years, the Tripe strutted its stuff. Even the landings were decent. if you decide to build one of these, seriously consider moving the axle location forward by 1-1 1/2 inches. I hear they are very prone to nose overs, but I can honestly say I have never had one. My problem on landing is the tendency to tip sideways and have a wing tip grab the grass. Another thing that is surprisingly good is the effectiveness of the rudder when taxiing. I do not have a steerable tailwheel, just a sprung tail skid as per the plans. At maximum rudder deflection, I can turn her on a dime using a blast of throttle when necessary. Things might be a bit different if you fly off pavement, though.

(in reply to TLH101)
       Post #: 8

Ziroli DR1 - 8/12/2003 4:57:11 PM   
Nickrc3



Posts: 402
Joined: 1/12/2002
From: Miami, FL, USA
Status: offline 		Glad to hear that vonJaerschky!

While I didn't move my landing gear forward I did widen the wheelbase. Is your gear functional?
I've had the same problem with the wingtips. Take a 12" length of 2/56 music wire and bend a shallow loop that will conform under the bottom wing. Make sure you have enough depth to this hoop allowing the ground clearance desired. Paint and epoxy up under wingtip.
These should help in those wingover's.
The real ones used axe handles acting in this capacity, but also to provide a grab handle so ground personnel could guide the plane as they ran along side of it during take-off.

My TriPlane hasn't flown since JoeNall 97', but I still enjoy the visual appeal of those bright red wings while watching the old videos. Been bitten by the WWII bug, but hope to resurrect her soon.

NICK

(in reply to TLH101)
       Post #: 9

Ziroli DR-1 Triplane. - 8/12/2003 6:13:50 PM   
vonJaerschky



Posts: 205
Joined: 8/25/2002
From: Comox, BC, CANADA
Status: offline 		No, my landing gear is not functional. I do have a set of drawings to build a set with functional bungee support. I don't know if this would help though. I think the bungee would absorb the shock and then spring back and throw the airplane the other way. Widening the distance between the wheels is a good idea.

(in reply to TLH101)
       Post #: 10

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