RE: Scratch Building 1/4-Scale Pitts Model-12
Curt, The build looks great! Keep it up! Rich
Posted on: 8/1/2012 9:51 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=11178045

RE: Pitts M12 26% plans available soon
[quote]ORIGINAL: Hydro Junkie Too bad Rich is shutting down his parts business as far as the Pitts is concerned. After exchanging PMs, I sent him payment and, to my surprise, received my parts in less than a week. Doesn't get any better than that but, unfortunately, I need to find landing gear to fit as well as obtain an engine. I've already decided to go with a DA-50 for power so does anyone have any ideas on what to use for the landing gear? [/quote] Thanks for the kind words Hydro Junkie! I recommend that you check out the existing options at TNT landing gear: http://tntlandinggear.com/ Rich
Posted on: 6/22/2012 8:02 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=11128375

RE: Pitts M12 26% plans available soon
It is looking like 2 cowls will be left here shortly. The canopies are gone, except one that has a scratch (unless you are OK with that). Still have wing tubes and cabanes. Any more takers?
Posted on: 6/5/2012 9:47 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=11108215

RE: Pitts M12 26% plans available soon
[quote]ORIGINAL: curtrc I wasn't going to resurrect this thread but since someone else already did.. I referred to these plans while designing my own S12 (1/4-ish scale, 62'' wingspan/length, 30cc) and In case the original designer still checks I want to thank you for your hard work, it made my hard work somewhat less hard :) You are right this is an incredible level of effort. I'll be sending it out for laser-cutter quote this week.. no idea who I'm going to use or how much it's going to cost, this is the first time I've attempted a project this large and involved and there is just no way I can scroll-saw it. If the design flies anything like stable I'll be happy to provide plans/details/drawings to anyone who wants them. And if not.. well I'll still let anyone have them as an example of what NOT to do. Scratch-build thread:  <a href=''http://www.rcuniverse.com/forum/m_11096359/tm.htm''>http://www.rcuniverse.com/forum/m_11096359/tm.htm  -Curt the attached photo is the current state after some simplification passes and moving the wings 1'' back. Questions/comments/wtfyoufailed appreciated. [/quote] I like it so far! Nice CAD work.
Posted on: 6/5/2012 9:45 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=11108214

RE: Pitts M12 26% plans available soon
Yes, I will ship pretty much anywhere in the world. I will send you a PM with shipping and payment details.
Posted on: 6/3/2012 9:50 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=11105398

RE: Pitts M12 26% plans available soon
[quote]ORIGINAL: rgunder [quote]ORIGINAL: rgunder Hi everyone.  I was organizing the garage and found that I still have 5 fiberglass cowls, some wing tubes, 3 canopies, and a lot of cabane struts.  I want to free up the space, so of you want one send me a PM.  First come first served.  $40 for the cowl, $25 for the canopy, $40 for the wing tubes, and $10 for the cabanes, plus shipping
Posted on: 6/2/2012 8:03 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=11104295

RE: Pitts M12 26% plans available soon
[quote]ORIGINAL: rgunder Hi everyone.  I was organizing the garage and found that I still have 5 fiberglass cowls, some wing tubes, 3 canopies, and a lot of cabane struts.  I want to free up the space, so of you want one send me a PM.  First come first served.  $40 for the cowl, $25 for the canopy, $40 for the wing tubes, and $10 for the cabanes, plus shipping of course. Rich [/quote] One
Posted on: 2/29/2012 1:16 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10981884

RE: Pitts M12 26% plans available soon
Hi everyone.  I was organizing the garage and found that I still have 5 fiberglass cowls, some wing tubes, 3 canopies, and a lot of cabane struts.  I want to free up the space, so of you want one send me a PM.  First come first served.  $40 for the cowl, $25 for the canopy, $40 for the wing tubes, and $10 for the cabanes, plus shipping of course. Rich
Posted on: 2/25/2012 8:13 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10976010

RE: 162
Two words: Awesome!
Posted on: 12/8/2011 8:26 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10850961

RE: 162
Very cool landing gear! I am eager to see how you finish those off. The springs are probably easier, but the compressed air would be a little more forgiving on a hard landing?
Posted on: 12/1/2011 9:02 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10839157

RE: 162
Ha! I thought that you may have just been a glutton for punishment :)
Posted on: 11/22/2011 8:45 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10824932

RE: 162
[quote]ORIGINAL: Thunderbolt47 OMT I don't know if Oleo was the right word to use. What defines it as Oleo? [/quote] An oleo is a shock absorber with an oil chamber, a gas chamber, and a piston that when compressed forces oil through an orifice into the gas chamber, compressing the gas and resisting the shock. Rich
Posted on: 11/21/2011 9:17 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10823278

RE: 162
I see the gear is in place - how did you mount it? Did you build the oleo struts you talked about?
Posted on: 11/18/2011 10:48 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10819024

RE: Pitts M12 26% plans available soon
Hello everyone. I just wanted to post a quick note to let everyone know that I have decided to close Gunderson AeroDesign effective immediately due to severe limitations on time and balancing work, family, and my entrepreneurial pursuits. Thanks to all for your support over the years! The website has been taken down and we will no longer be distributing the plans for the Pitts. There are a lot of plans already out there, so I hope to still see some beautiful airplanes coming from the readers of this thread in the future. Thanks, Rich
Posted on: 6/20/2011 9:09 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10584504

RE: Pitts M12 26% plans available soon
I love the little Pitts!
Posted on: 6/1/2011 8:32 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10552613

RE: Pitts M12 26% plans available soon
Welcome to RCUniverse Daniel! I'll be watching for your posts here and using Google Translate to watch your posts in German :D
Posted on: 5/26/2011 7:12 AM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10541305

RE: Pitts M12 26% plans available soon
We have now distributed over 1000 free copies of the plans - that's a lot of builders, so let's see some more build photos and videos!
Posted on: 5/25/2011 9:20 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10540833

RE: Pitts M12 26% plans available soon
Hi Everyone! I am pleased to announce today that we are slashing the price of the Spirit of Pitts from $224.99 to $199.99! And even better, if you order before the end of May, the price is just $179.99! So if you feel like saving $45 on the short kit, now is the time. These savings are coming from improvements to how we produce the kit, but the overall kit has remained the same quality that you have come to expect. The turnaround time is expected to be one week from order to shipment. The pricing is available now on the website: [link=http://www.gundersonaerodesign.com/products/shortkits/burton]Spirit of Pitts webpage[/link] Another new item is that we added the ability to accept international orders directly through our shopping cart! Let the building begin! Rich
Posted on: 5/23/2011 11:47 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10537490

RE: 162
Can't wait to see the details on the homemade oleo struts - that sounds to me like the sort of overcomplicated DIY job that I just dig! [:D]
Posted on: 5/5/2011 10:11 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10504304

RE: Pitts M12 26% plans available soon
[quote]ORIGINAL: glonline Hi guys, I'm happy to tell you that my pitts was exposed in a little italian rc-plane show (only as static model) photo's always here : https://picasaweb.google.com/glonline/PittsM12# [/quote] That's great! It looked beautiful even without getting off the ground!
Posted on: 4/13/2011 5:51 AM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10460017

RE: 162
Beautiful engine! Which brand/model is it?
Posted on: 4/5/2011 3:51 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10445231

RE: Pitts M12 26% plans available soon
sbsam, I can't seem to find your request, did you use the form on our website? Please send me a PM with your email address so that I can double check against the requests to make sure that I did not miss it. Thanks, Rich
Posted on: 3/3/2011 10:26 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10377961

RE: 162
[quote]ORIGINAL: Thunderbolt47 [quote]ORIGINAL: emilsanto just one question, well a few LOL  where did you get your plan size increased .? and how did they do it. was it printed out on one sheet.? i aways wondered what the process can you explain it for me thanks [/quote] I had the plans doubled in size. All of the printers I found would only print a 36'' wide sheet. (The original size plans were also 36'') So, First I folded the plans in half ( or you can cut them in half) and ran it threw the scanner. Then print out the new size. Do both sides. I started with 3 sheet and ended with 6. (Double lol) I found OfficeMax had the best machine.(and there employee wasn't an idiot) It can handle paper as long as you need. Kinko's couldn't even figure out what I wanted to do. also there machine could only do a 120'' long sheet. Plus they costed more than OfficeMax. To double the size, you enlarge it by 200% Hope this helps, Kelly [/quote] I've doubled plans sizes before as well and I recommend that when you fold the plans, leave a little more than half the plan showing (maybe 2" more) to allow you to overlap the two halves after scanning. I use gimp (www.gimp.org) for the image processing - it's an open source program that does nearly everything that Photoshop does, but for free!
Posted on: 2/18/2011 10:57 PM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10347226

RE: Pitts M12 26% plans available soon
Hi all, With the new year comes some changes to what we are going to offer in the future for the Spirit of Pitts. We will continue to offer the plans for download free of cost on our website, and we will continue to offer the short kits, but we will be phasing out all the accessories over time as we get through the stock on hand. As you know, I have been working to find an affordable way to continue to bring you a high quality canopy and cowling option, but alas the unit costs were simply too high and the market too small to make it feasible, so Gunderson AeroDesign will no longer offer these accessories. The full wood kit is suffering a similar fate, as having metric balsa custom milled requires a volume larger than the market can sustain at this time. I apologize for the inconvenience. Please note that for the two most difficult parts to scratch build (canopy and cowling) the plans and the short kit still include the formers necessary to build a wood cowling and a canopy mold. Thanks for the continued support and happy 2011! Rich Gunderson
Posted on: 1/9/2011 12:12 AM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10249662

RE: RCM Flybaby Laser cut kit?
Hi Jim. My brother and I own Laser Edge Cutters and we build up short kits from plans pretty regularly. Working from the plans is a little more labor intensive than working from existing CAD files, because we have to scan the plans, convert them to CAD, and then clean up and extract the parts that you want cut, but the end result is worth the wait. The CAD conversion includes squaring up slots for stringers and spars, and making sure that all of the formers are symmetric, which is not always the case with a set of hand drawn plans. If you know how to use CAD, you can save yourself some money - if you don't know how to use CAD we can do that for you, although it does increase the cost of the kit. If you are interested in learning some more, please check out our website [link=http://www.laseredgecutters.com/service/materials/materials-for-model-airplanes]http://www.laseredgecutters.com/service/materials/materials-for-model-airplanes[/link], or send me a PM. I've always loved the look of the Flybaby - simple yet classic lines. Good luck with the build. Rich
Posted on: 11/22/2010 12:14 AM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10151095

RE: Question building polyhedral wing, and wings in general
[quote]ORIGINAL: BMatthews These days I build the dihedral breaks and panels all in one go by using a pair of building boards angled upwards to match the dihedral angle. For polyhedral I start on one side and work across to the center and then over to the other tip by only cutting the spars and leading and trailing edges to length. THis way I build around the dihedral joints and can fit everything quite finely. [/quote] Very cool - how do you setup the building boards? Do you have a picture? I am very interested in that technique. Thanks!
Posted on: 11/21/2010 11:57 PM by Author "rgunder" in the forum "RC Gliders, Sailplanes and Slope Soaring"
http://www.rcuniverse.com/forum/fb.asp?m=10151062

RE: Question building polyhedral wing, and wings in general
Sounds like what you need is a tapered wall :) I think that the problem is that you start getting some complex angles when you combine even small amounts of wing twist and dihedral (or polyhedral). You may want to temporarily bond the wing panels together as designed then check for twist by sighting down the wing or some other method. There is one method in particular that comes to mind, but I am having a difficult time finding the link for it right now. If I find it, I will post it. In any case, if the wing appears twisted, you can fix that with the covering, and that may pull the trailing edge back in line. Good luck! I hope your son enjoys his first plane!
Posted on: 11/21/2010 11:56 PM by Author "rgunder" in the forum "RC Gliders, Sailplanes and Slope Soaring"
http://www.rcuniverse.com/forum/fb.asp?m=10151057

RE: Pitts M12 26% plans available soon
[quote]ORIGINAL: Zpat I've powered mine with a 1.80 Moki. Although it's short on power it flys very well. My only modification was to use music wire for cabanes and landing gear. [/quote] Beautiful build Zpat - what did you use for covering and what size music wire did you use for the cabanes and landing gear?
Posted on: 10/22/2010 2:25 AM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10085566

RE: Pitts M12 26% plans available soon
[quote]ORIGINAL: glonline fuse building problem : wings are 350 mm wide but in fuselage from F2A to F5 there is only 332 mm. Do I have to cut rear edge of the wing ? GL [/quote] glonline, the plans (fuselage side view) show the trailing edge skins should be trimmed to fit. The amount of trimming depends on how sharp you make the trailing edge - a blunt trailing edge will not need as much trimming. I hope that makes sense.
Posted on: 10/11/2010 1:08 AM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10060850

RE: 162
Wow! Very impressive Kelly. I can't wait to see it complete. You say this is your first scratch build?
Posted on: 9/26/2010 1:40 AM by Author "rgunder" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10027518