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Thanks for your help Charlie. I will bring it into the group and let you know if we need the drawings. In the meantime I'll wait for more response from other Dragonfly builders as an inspiration.Regards,MarkVan: main@DragonflyList.groups.io <main@DragonflyList.groups.io> namens One Sky Dog via groups.io <Oneskydog@...>
Verzonden: maandag 26 september 2022 11:55
Aan: main@DragonflyList.groups.io <main@DragonflyList.groups.io>
Onderwerp: [Extern]:Re: [DragonflyList] Tail-Wheel configuration OK?LET OP: Deze e-mail komt van een afzender buiten Inholland. Wees voorzichtig met het klikken op links en het openen van bijlagen.
ATTENTION: This email is from a sender outside Inholland. Please be careful when opening links or attachments.
Mark,I replaced the plans solid link with a double spring piston. With the original linkage it would dart toward the rudder input when the tail wheel contacted the ground.I can look for my drawing. I took the original tube and cut it at the mid point. I made a small Teflon piston threaded the cutoff tube and bolted the piston on. There is a compression spring on each side of the piston about 5” long. The pistons and link tube are inserted into an aluminum tube. The aluminum tube has circlip grooves on the id of the tube. On the tail wheel end a -4 fork is fitted to a 1/2” plug that fits inside the aluminum tube the circlip holds it in. The original steel rod spring, piston, spring go into the tube and another aluminum plug with a hole for the piston rod to pass through is held in the outer aluminum tube with another circlip.
I can look for the drawing if you want to make one. It has worked well for me. You can also use the traditional chains and springs on each side to decouple the tail wheel from the rudder.Regards, -
Mark,I replaced the plans solid link with a double spring piston. With the original linkage it would dart toward the rudder input when the tail wheel contacted the ground.I can look for my drawing. I took the original tube and cut it at the mid point. I made a small Teflon piston threaded the cutoff tube and bolted the piston on. There is a compression spring on each side of the piston about 5” long. The pistons and link tube are inserted into an aluminum tube. The aluminum tube has circlip grooves on the id of the tube. On the tail wheel end a -4 fork is fitted to a 1/2” plug that fits inside the aluminum tube the circlip holds it in. The original steel rod spring, piston, spring go into the tube and another aluminum plug with a hole for the piston rod to pass through is held in the outer aluminum tube with another circlip.I can look for the drawing if you want to make one. It has worked well for me. You can also use the traditional chains and springs on each side to decouple the tail wheel from the rudder.Regards,
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Hi all,making progress with our electric Dragonfly, however still have some doubts about the tail-wheel configuration. The building manual describes a direct connection of the tail-wheel pushrod without a spring-system in between (see picture below). I would assume that a spring-system interface between the pushrod and tail-wheel would be recommended for crosswind landings. Is this assumption correct?What tail-wheel configuration do you have on your Dragonfly (with or without spring)? Could you send me some pictures?Regards,Mark
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Charlie Johnson (OneSkyDog) and myself are also long time Composites M.E. Currently I am working on Contract atBoeing on a Military Mod program based on the737NG but of course that one is mostly metal (tho not all). Part of mycurrent job assignment is supporting Boeing Winnipeg who supply many of the structural composites builds for severalprograms, so I still have my noggin buried in resin processes and such. It pays better than Social Insecurity right now.Charlie had most of his beatings on the Space side of Aero Space.. I have had mine on the Aero side. My beginnings inplastic airplanes began at FalconJet on the Falcon 50 program when it was new (1979/1980). I was one of the Lead A&P inLittle Rock and we had to learn then transfer the training on in field repairs in case we had an AOG. The control surfaces ofthe Falcon 50 are carbon fiber/honeycome construction.There were two layup verisons of the Dragonfly canard. I have the MK II, second generation with no anhedral for my project.Vern LehmanDas Frankenbird
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Wow thanks!!!I have gotten inputs from many sources including a daggerboard builder. I have a plan I can share with you and see if I'm on the right track if you don't mind.Basic construction is Divinycell H80 5lb/cubic foot density foam core shaped to NACA 63A10 foil. 24 " cord.Box spar at 30% cord, 6 inches wide.Box spar layup - 2 layers 10oz at 45 each face (not the spar cap face) and 2 layers 10 oz wrapped 3 faces. for and aft. I will attach a sketch.Spar cap - 4 layers of 25 oz uni spar cap tape from ACS both top and bottomSkin layup - 2 layers 17oz knitted uni with CSM both at 45 to spar and each other.Final layer of 10oz for sanding protection at 90 deg.Vinyl Ester resin,Thanks again ... Tom 520-343-8016
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Wow thanks!!!I have gotten inputs from many sources including a daggerboard builder. I have a plan I can share with you and see if I'm on the right track if you don't mind.Basic construction is Divinycell H80 5lb/cubic foot density foam core shaped to NACA 63A10 foil. 24 " cord.Box spar at 30% cord, 6 inches wide.Box spar layup - 2 layers 10oz at 45 each face (not the spar cap face) and 2 layers 10 oz wrapped 3 faces. for and aft. I will attach a sketch.Spar cap - 4 layers of 25 oz uni spar cap tape from ACS both top and bottomSkin layup - 2 layers 17oz knitted uni with CSM both at 45 to spar and each other.Final layer of 10oz for sanding protection at 90 deg.Vinyl Ester resin,Thanks again ... Tom 520-343-8016
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Hello,I rarely contribute to 'the list', but I am a composites manufacturing engineer for the likes of NG and LM.I've been doing integration for the last year, so I would be ecstatic to help you make a plan for your lay-up. ...'stem to stern, (figuratively speaking)Please feel free to get in touch with me on my mobile 931-624-0112, and I can help you to get started with your plan.I wish that I could tell you what you need to know in this forum, I just don't have the time to write another plan. (lol, I bet many of you know what I mean)Cheers, and looking forward to you call,
Justin Sloan,
Sloan Technologies
'Knowledge Shared Is Knowledge^2' -
Hello,I rarely contribute to 'the list', but I am a composites manufacturing engineer for the likes of NG and LM.I've been doing integration for the last year, so I would be ecstatic to help you make a plan for your lay-up. ...'stem to stern, (figuratively speaking)Please feel free to get in touch with me on my mobile 931-624-0112, and I can help you to get started with your plan.I wish that I could tell you what you need to know in this forum, I just don't have the time to write another plan. (lol, I bet many of you know what I mean)Cheers, and looking forward to you call,
Justin Sloan,
Sloan Technologies
'Knowledge Shared Is Knowledge^2' -
Hi Charlie,I have seen your videos, impressive and informative! Earlier I brought up the idea to organize a user group meeting to share thoughts and experiences, which is still in the pipeline. Would be nice if you can join this session as well. But first things first... I estimate empty weight to be around 400kg/880lbs. Official weight & balance measurements will be performed by the end of this month.Regards,MarkVan: main@DragonflyList.groups.io <main@DragonflyList.groups.io> namens One Sky Dog via groups.io <Oneskydog@...>
Verzonden: woensdag 14 september 2022 14:56
Aan: main@DragonflyList.groups.io <main@DragonflyList.groups.io>; main@dragonflylist.groups.io <main@dragonflylist.groups.io>
Onderwerp: [Extern]:Re: [Extern]:Re: [DragonflyList] First electric Dragonfly taxi testLET OP: Deze e-mail komt van een afzender buiten Inholland. Wees voorzichtig met het klikken op links en het openen van bijlagen.
ATTENTION: This email is from a sender outside Inholland. Please be careful when opening links or attachments.
Hi Mark,What is the empty weight of the electric Dragonfly? Congratulations on getting to the taxi stage.I have a Dragonfly 1987-2006 scraped 2011 reregistered new AWC that has undergone several rebuilds. There are 2022 videos of the latest flight on my You Tube channel. I will be moving it to Arizona for further test flying. -
Hi Charlie,I have seen your videos, impressive and informative! Earlier I brought up the idea to organize a user group meeting to share thoughts and experiences, which is still in the pipeline. Would be nice if you can join this session as well. But first things first... I estimate empty weight to be around 400kg/880lbs. Official weight & balance measurements will be performed by the end of this month.Regards,MarkVan: main@DragonflyList.groups.io <main@DragonflyList.groups.io> namens One Sky Dog via groups.io <Oneskydog@...>
Verzonden: woensdag 14 september 2022 14:56
Aan: main@DragonflyList.groups.io <main@DragonflyList.groups.io>; main@dragonflylist.groups.io <main@dragonflylist.groups.io>
Onderwerp: [Extern]:Re: [Extern]:Re: [DragonflyList] First electric Dragonfly taxi testLET OP: Deze e-mail komt van een afzender buiten Inholland. Wees voorzichtig met het klikken op links en het openen van bijlagen.
ATTENTION: This email is from a sender outside Inholland. Please be careful when opening links or attachments.
Hi Mark,What is the empty weight of the electric Dragonfly? Congratulations on getting to the taxi stage.I have a Dragonfly 1987-2006 scraped 2011 reregistered new AWC that has undergone several rebuilds. There are 2022 videos of the latest flight on my You Tube channel. I will be moving it to Arizona for further test flying. -
Hi Mark,What is the empty weight of the electric Dragonfly? Congratulations on getting to the taxi stage.I have a Dragonfly 1987-2006 scraped 2011 reregistered new AWC that has undergone several rebuilds. There are 2022 videos of the latest flight on my You Tube channel. I will be moving it to Arizona for further test flying.
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Hi Mark,What is the empty weight of the electric Dragonfly? Congratulations on getting to the taxi stage.I have a Dragonfly 1987-2006 scraped 2011 reregistered new AWC that has undergone several rebuilds. There are 2022 videos of the latest flight on my You Tube channel. I will be moving it to Arizona for further test flying.
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Thanks everyone for your response!We make our own vocal "vrooom" sound in the cockpit ;-). Hopefully not accidentaly open the radio in that case.FYI: the 5-bladed prop is chosen to be more silent. So far, the powertrain has been performing very well.Thank you Skip! We perform our taxi tests and first flight at International Airport Teuge. Looking forward to see your projects getting of the ground. Good luck!Regards,MarkVan: main@DragonflyList.groups.io <main@DragonflyList.groups.io> namens Fredd Baber via groups.io <freddb43@...>
Verzonden: dinsdag 13 september 2022 17:53
Aan: main@dragonflylist.groups.io <main@dragonflylist.groups.io>
Onderwerp: [Extern]:Re: [DragonflyList] First electric Dragonfly taxi testLET OP: Deze e-mail komt van een afzender buiten Inholland. Wees voorzichtig met het klikken op links en het openen van bijlagen.
ATTENTION: This email is from a sender outside Inholland. Please be careful when opening links or attachments.
Cool, but you’ll have to make your own “vrooom” sounds when you take off!Fredd Baber
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Thanks everyone for your response!We make our own vocal "vrooom" sound in the cockpit ;-). Hopefully not accidentaly open the radio in that case.FYI: the 5-bladed prop is chosen to be more silent. So far, the powertrain has been performing very well.Thank you Skip! We perform our taxi tests and first flight at International Airport Teuge. Looking forward to see your projects getting of the ground. Good luck!Regards,MarkVan: main@DragonflyList.groups.io <main@DragonflyList.groups.io> namens Fredd Baber via groups.io <freddb43@...>
Verzonden: dinsdag 13 september 2022 17:53
Aan: main@dragonflylist.groups.io <main@dragonflylist.groups.io>
Onderwerp: [Extern]:Re: [DragonflyList] First electric Dragonfly taxi testLET OP: Deze e-mail komt van een afzender buiten Inholland. Wees voorzichtig met het klikken op links en het openen van bijlagen.
ATTENTION: This email is from a sender outside Inholland. Please be careful when opening links or attachments.
Cool, but you’ll have to make your own “vrooom” sounds when you take off!Fredd Baber
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Unfortunately, making your own vroom sounds will require and installation of windshield wipers on the inside of your windscreen.
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Unfortunately, making your own vroom sounds will require and installation of windshield wipers on the inside of your windscreen.
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Hi Mark,Its good to see the your Dragonfly move under its own power. Way to go!Will
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Hi Mark,Its good to see the your Dragonfly move under its own power. Way to go!Will
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Cool, but you’ll have to make your own “vrooom” sounds when you take off!Fredd Baber
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Cool, but you’ll have to make your own “vrooom” sounds when you take off!Fredd Baber
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On 9/13/22 4:41 AM, Ommert, Mark via groups.io wrote:Congratulations Mark! It is good to see the progress since I visited in Delft. It looks good running under its own power.What airport are you using for the taxi tests?Skip EgdorfHi everyone,hereby a nice video of our Electric Dragonfly tested for the first time at an airport. More videos can be seen on this channel. Enjoy!Kind regards,Mark Ommert
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On 9/13/22 4:41 AM, Ommert, Mark via groups.io wrote:Congratulations Mark! It is good to see the progress since I visited in Delft. It looks good running under its own power.What airport are you using for the taxi tests?Skip EgdorfHi everyone,hereby a nice video of our Electric Dragonfly tested for the first time at an airport. More videos can be seen on this channel. Enjoy!Kind regards,Mark Ommert
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Hi everyone,hereby a nice video of our Electric Dragonfly tested for the first time at an airport. More videos can be seen on this channel. Enjoy!Kind regards,Mark Ommert
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Hi everyone,hereby a nice video of our Electric Dragonfly tested for the first time at an airport. More videos can be seen on this channel. Enjoy!Kind regards,Mark Ommert
Re: Tail-Wheel configuration OK?
in Dragonfly Mailing List (read-only)
Posted
Because I use the larger Q200 tail wheel I installed a spring set up to take a bit of the sensitivity out of it.
In my Q200 I have the 2.5 turbocharged Subaru. I needed 14 lbs on the tail wheel for C.G. so I installed a ten lb lead rod in the vertical stab and installed 4 lbs attached to the tail wheel and enclosed it with a fairing.
That's what I did ---------- Have fun
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