Cessna Retracts
01-16-2015, 12:47 PM
#151
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hey guys, ive been and will be out of the loop for another couple of months
when it rains it pours... my rental house needs emergency attention among other things keep up the good work, so i can read the forums while im stuck in a hotel room across the country at work flying!!!!
when it rains it pours... my rental house needs emergency attention among other things keep up the good work, so i can read the forums while im stuck in a hotel room across the country at work flying!!!!
02-21-2015, 03:07 PM
#152
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Actually the 45degree pivot is the way it was done on the real thing... I located a maintenance trainer and took a few photos of how this thing works. I know about the legs swinging down at first then retracting slowly but I suspect that is because of the the hydralic motor they use.
Paul
Paul
don
02-23-2015, 02:37 PM
#154
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I recently found out my dentist has a r182 tied down at the local airport. It looks like it hasn't been touched in years. Looking at it helped me to the to design the nose gear doors. I wish that I knew it was there before starting this project. We are still fairly close to scale. The elect motor is installed and its now time to complete this ARF and test fly the retractable gear set up.
Jim
Jim
03-29-2015, 05:54 PM
#156
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337 retracts
Hi Paul,
thanks for your help with clarification on your photos. I have a working prototype and thought you might like to see it in action.
Don
http://youtu.be/gu3yfsQ7AiM
thanks for your help with clarification on your photos. I have a working prototype and thought you might like to see it in action.
Don
http://youtu.be/gu3yfsQ7AiM
03-30-2015, 02:58 AM
#159
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Yes please more photos, your work is awesome.I'm sure there are a LOT of people wanting to do the same thing you have accomplished. For me it's the best I've ever seen, again great work.....Don H.
03-30-2015, 06:36 AM
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I will put together some diagrams and photos to post (Perhaps a separate Thread). In the meantime here are a couple other Videos with Left Rear View, Rear view, and Front View.
Don
http://youtu.be/YNzaGF4cdac
http://youtu.be/uVQ9Z6QtjYk
http://youtu.be/5_66GAyrXIM
Don
http://youtu.be/YNzaGF4cdac
http://youtu.be/uVQ9Z6QtjYk
http://youtu.be/5_66GAyrXIM
06-17-2015, 03:05 PM
#164
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cessna 337 Retracts
Still trying to finish up the build. Darn work is getting in th way. The nose gear has been more trouble than I originally thought but the Doors and Cowl Flaps (front and rear) didn't help any either - time wise. Made my own nose strut since nothing was available of the proper length (short) that had some shock action that had a scale look. Also modified the fuse to make it a P337H version (primarily windows).
I'm still planning on uploading some diagrams and photos. In the meantime here is a YouTube link to the current configuration. I added some sequencer programming to more closely render the speed and bobbling action of the full scale main gear during the retraction and extension cycle.
https://youtu.be/yVHGTCKbSsU
I'm still planning on uploading some diagrams and photos. In the meantime here is a YouTube link to the current configuration. I added some sequencer programming to more closely render the speed and bobbling action of the full scale main gear during the retraction and extension cycle.
https://youtu.be/yVHGTCKbSsU
06-17-2015, 04:05 PM
#165
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Cessna 337 Retracts
Last edited by dkurtzid; 06-17-2015 at 04:11 PM. Reason: Added video link
08-28-2015, 07:21 PM
#166
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very nice work dkurtzid...very impressed with how smooth your gear and doors work. i plan to soon begin builing a custom skymaster kit with 100" wingspan and plan to alao build retracts. do you have any additional pictures you mightn be able to share. thanks so much. Ron
08-30-2015, 07:39 AM
#168
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dkurtzkid:
Excellent work! Im trying to do a similar mod to a lancair IV model, yet only use springs to hold the doors close as in the full size. If you have any more info/pictures of your mechanism and geometry it would be very helpful for the rest of us inferiors!!
Excellent work! Im trying to do a similar mod to a lancair IV model, yet only use springs to hold the doors close as in the full size. If you have any more info/pictures of your mechanism and geometry it would be very helpful for the rest of us inferiors!!
12-14-2015, 05:59 PM
#169
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Awesome work on the prototypes, has any more progress been made?
Cessna 210N, did you ever get your plug and mold finished for the 210?
dkurtzkid, how did you get such scale movement out of the mains? It really looks like they free fall for a bit before being picked up. That's awesome.
Cessna 210N, did you ever get your plug and mold finished for the 210?
dkurtzkid, how did you get such scale movement out of the mains? It really looks like they free fall for a bit before being picked up. That's awesome.
12-24-2015, 06:01 PM
#170
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Good progress on having retract for the mains available early next year. I have a second set made that I'm installing in a Cessna skylane 182RG I've scratch built. It's about the same size as the 337 (6ft span 12+ lbs). Plan is to have a consumer version of the Main Gear in two sizes for 12+ and 20+ lb Cessna models.
Regarding the retract motion, that is achieved using the DX-18 built in sequencer's proportional option. Not really necessary but it does a add an interesting touch.
I will have some pictures of the consumer version posted soon.
Regarding the retract motion, that is achieved using the DX-18 built in sequencer's proportional option. Not really necessary but it does a add an interesting touch.
I will have some pictures of the consumer version posted soon.
12-24-2015, 07:43 PM
#171
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Great news, thanks for all of the hard work. I have been going to buy a set of electric retracts to reverse engineer the electronics, but I haven't had a chance to. What is your anticipated price for them when they go into production?
12-25-2015, 12:46 PM
#172
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Trying to get the main gear for under 100 each, not counting servos. Currently using Hitec digital, 5245MG for the 12+lb size (76oz torque at 6.0v) and 5645MG for the 20+ Size (168oz torque at 6.0v) more than enough on the prototype in the 337. They can be programmed for up to 180deg rotation and still control speed. Normal retract servos are not adjustable for either speed or rotation amount.
12-25-2015, 01:11 PM
#173
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By the way Nightflyer01, I've read posts from you and others dating back as long as 10 years ago with interest retracts for the various Cessnas. I enjoy twin engine RC scale flying and liked the Seagull 337 but couldn't get excited by the fixed gear. So I purchased the Seagull 337 to use as a test fixture, thinking that if I could figure a way to incorporate retracts I would complete the build. The gear I made for the 337 works in the other Cessnas as well, 172rg, 177rg, 182rg, and 210. The Mains were the only challenge. I'm using a standard Robart retract for the nose gear.
Don
Don
Last edited by dkurtzid; 12-26-2015 at 08:02 AM.
12-26-2015, 11:45 AM
#174
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That's awesome. I have been working on them as well on and off for 10 years. I can get the geometry right, but can't figure out how to drive them. The digital servos sound like a good option too. However if you do produce them to sell, I would definitely buy a set.