Scratch Building, Aircraft Design, 3D/CAD If you are starting/building a project from scratch or want to discuss design, CAD or even share 3D design images this is the place. Q&A's.

RCM Plans Corkscrew

Reply
Old 11-02-2007, 09:59 PM
  #1
RCPilot66
Thread Starter
 
RCPilot66's Avatar
 
Join Date: May 2002
Location: Lakeland, FL
Posts: 15
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RCM Plans Corkscrew

Hello all! I'm getting tired of assembling ARFs so I have dusted off a set of plans that I bought a couple of decades ago and I had a blast cutting out the parts! I forgot how fun building could actually be!!

The plane I'm building is a RCM Plans Corkscrew designed by Stu Richmond from the 1982 issue of RCM. It's a .25 sized plane. I put some stipulations on my scratch building experience! Before I ran off to the hobby store to buy ANYTHING I had to exhaust my workshop stockpiles to see if I had the parts. Much to my amazement I've only had to spend about $6.00 on this airplane! I had almost all of the wood and if it wasn't for a warped 5/16" dowel rod I probably could have kept it under $5!

I've finished cutting out all of the parts and have assembled the left wing. In the magazine they said they built the plane in under 2 weeks. I'm trying to chip at it everyday and I've made pretty good progress over the last 4 days.

If any of you have flown this plane, remember it or just want to keep my motivation up I'd love to hear from you! Here's a couple of pics!

Jerry
Attached Thumbnails
Click image for larger version

Name:	Rp44065.jpg
Views:	203
Size:	74.1 KB
ID:	795635   Click image for larger version

Name:	Oj27415.jpg
Views:	148
Size:	91.0 KB
ID:	795636   Click image for larger version

Name:	Nt46126.jpg
Views:	149
Size:	160.3 KB
ID:	795637   Click image for larger version

Name:	Cv61672.jpg
Views:	175
Size:	48.4 KB
ID:	795638  
RCPilot66 is offline  
Reply With Quote
Old 11-03-2007, 09:11 AM
  #2
CoosBayLumber
 
Join Date: Jan 2002
Location: San Bernardino Calif
Posts: 3,757
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Really isn't all that difficult once you get going with a piece of knowledge behind you. Is it?

Presume that even before you fly it that you have now been thumbing other catalogues for A/C of a different type.

Gee, that was't so hard. Cost me only a few dollars to have something completely different than those Shake in the Box types.

Hang on to those skills and knowledge, for they will pay off later on.

Wm.
CoosBayLumber is offline  
Reply With Quote
Old 11-03-2007, 12:22 PM
  #3
Sir Crashalot
 
Sir Crashalot's Avatar
 
Join Date: Jun 2007
Location: , FL
Posts: 187
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Jerry
Looks like you’ve got a great build started there! Looks to be a real fun flyer! Might have to build one of these myself. I too, love to build. There’s a deep satisfaction when something you built takes to the air. Keep up the good work, and keep us posted!
Bob J.
Sir Crashalot is offline  
Reply With Quote
Old 11-03-2007, 04:41 PM
  #4
Falcon III
 
Join Date: Jun 2007
Location: Miami, FL
Posts: 9
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Hello Jerry

This bird is looking GOOOOD!!! , and keep us posted!

Saludos Enrique
Falcon III is offline  
Reply With Quote
Old 11-03-2007, 09:17 PM
  #5
RCPilot66
Thread Starter
 
RCPilot66's Avatar
 
Join Date: May 2002
Location: Lakeland, FL
Posts: 15
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Left wing is complete. Ready to join the two halfs.
Attached Thumbnails
Click image for larger version

Name:	Mk26234.jpg
Views:	211
Size:	69.2 KB
ID:	796352  
RCPilot66 is offline  
Reply With Quote
Old 03-29-2010, 12:28 PM
  #6
Tee Bee
 
Join Date: Feb 2007
Location: Angleton, TX
Posts: 1,883
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Any updates on the Corkscrew project? I just ordered a set of plans for myself. Can't find much online about this one. What mag issue was it featured in? Thanks.
Tee Bee is online now  
Reply With Quote
Old 07-02-2010, 05:50 AM
  #7
Tee Bee
 
Join Date: Feb 2007
Location: Angleton, TX
Posts: 1,883
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

I just started building mine and would love to get feedback from any experienced Corkscrew builders/pilots. I'm going to use an OS .25FX. A few minor mods are planned but I think it'll be mostly stock. Thanks.
Attached Thumbnails
Click image for larger version

Name:	Tr50419.jpg
Views:	104
Size:	73.1 KB
ID:	1461862   Click image for larger version

Name:	Ge95262.jpg
Views:	115
Size:	104.2 KB
ID:	1461863  
Tee Bee is online now  
Reply With Quote
Old 08-11-2010, 04:44 PM
  #8
GarySS
 
Join Date: Apr 2002
Location: Center of the Flyover States,
Posts: 2,123
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Hello Corkscrew Drivers,
I'm surprised there is any interest in this design. I've built 3 of them and am currently on my fourth. After the first 25 sized I upscaled it by 1.0812% to get me to appx 53" wingspan and I could put my ThunderTiger .36 on it. I also built a 60" span model. Now I am back to the 1.08% size, but am going with a trailing edge tapered wing, bolted on, and some sort of modified turtle deck. It is all in the works, but I work slow and it could be months while the summer flying season is in process.

The great thing about this design is its ability to upright flat spin like a top. And as designed it is a very simple build; great for first timer scratch builders.
I may post some results later.
Attached Thumbnails
Click image for larger version

Name:	He97285.jpg
Views:	240
Size:	126.1 KB
ID:	1482637  
GarySS is offline  
Reply With Quote
Old 01-21-2011, 10:32 PM
  #9
Tee Bee
 
Join Date: Feb 2007
Location: Angleton, TX
Posts: 1,883
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Thought I'd bring this thread back to life with some pics of my Corkscrew project. After a long dormant period, it's underway again. I've been enjoying this build a lot.

I've deviated from the plans in a few places including the wingtip design. Once I traced a shape I liked on paper, I transferred it to some light balsa blocks. I then traced the aerodynamic profile on the sides. Cut out the top shape on the scroll saw, then taped the pieces back together, turned the block on it's side, and cut out the aerodynamic profile. Then I rounded the corners by handsanding until I liked the shape. Very fun and satisfying work!
Attached Thumbnails
Click image for larger version

Name:	Vs55759.jpg
Views:	111
Size:	132.0 KB
ID:	1551155   Click image for larger version

Name:	Mk25476.jpg
Views:	107
Size:	78.7 KB
ID:	1551156   Click image for larger version

Name:	Pn37638.jpg
Views:	103
Size:	81.7 KB
ID:	1551157   Click image for larger version

Name:	Tr51058.jpg
Views:	100
Size:	71.2 KB
ID:	1551158   Click image for larger version

Name:	Yw66742.jpg
Views:	105
Size:	67.4 KB
ID:	1551159  

Click image for larger version

Name:	Ca82738.jpg
Views:	125
Size:	65.6 KB
ID:	1551160   Click image for larger version

Name:	Fd91904.jpg
Views:	127
Size:	67.7 KB
ID:	1551161  
Tee Bee is online now  
Reply With Quote
Old 01-21-2011, 10:47 PM
  #10
Tee Bee
 
Join Date: Feb 2007
Location: Angleton, TX
Posts: 1,883
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

I joined the wing panels in a more traditional manner than that called for on the plans with center ribs epoxied together. The center section was sheeted with 1/16" balsa. The aileron servo hole was cut out so that the servo could stand upright instead of laying on it's side as on the drawings. The torque rods were bent with 5 degrees of offset to provide aileron differential(more up than down) per the plans. The trailing edge pieces were channeled so that the torque rod sleeves would fit flush for mounting.

GarySS, I would love to see more of your Corkscrew pics and updates.
Attached Thumbnails
Click image for larger version

Name:	Zx69879.jpg
Views:	135
Size:	140.7 KB
ID:	1551162   Click image for larger version

Name:	Om32558.jpg
Views:	130
Size:	87.0 KB
ID:	1551163   Click image for larger version

Name:	Db84087.jpg
Views:	105
Size:	80.3 KB
ID:	1551164   Click image for larger version

Name:	Om33489.jpg
Views:	112
Size:	81.9 KB
ID:	1551165  
Tee Bee is online now  
Reply With Quote
Old 01-22-2011, 02:34 PM
  #11
GarySS
 
Join Date: Apr 2002
Location: Center of the Flyover States,
Posts: 2,123
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Hi Tee Bee, I'm slower than you are in this project! I'll finish up a 3D Primo first before progressing on the Corkscrew so it will be a couple of months.

I do have the wing basically framed except for the center sheeting. Like you I am sheeting more of the center in order to set up a bolt on modification. My wing is also modified to have a trailing edge taper like an Edge 540 with less dihedral. I thought about a radical redesign, but that is not what the Corkscrew is all about........it's about simplicity turned into a fun flying model. I wish we could correspond with the designer, Stu Richmond, but I don't think he travels the internet. His input would be valuable, etc.

My aileron servo on the latest version was also upright with a little housing protruding out the wing's bottom. I think it was a "male" corkscrew .
GarySS is offline  
Reply With Quote
Old 01-22-2011, 03:04 PM
  #12
Tee Bee
 
Join Date: Feb 2007
Location: Angleton, TX
Posts: 1,883
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Was the protrusion to prevent possible interference with the pushrods?
Tee Bee is online now  
Reply With Quote
Old 01-23-2011, 09:26 AM
  #13
GarySS
 
Join Date: Apr 2002
Location: Center of the Flyover States,
Posts: 2,123
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

I suppose you could say that, as I was insuring I had enough room for all of the radio gear. As it turned out I don't really think I needed to mount a corner of my servo outside the wing. But, remember my model was 8% larger on my last version. The first build was totally stock size and I mounted the servo on its side. I tried to upload some pictures last night, but RCU refused. Will try again, maybe with a high speed connection.

Picture of new version wing: Picture of rig stack with ply root 10 1/2 inches and tip about 7 1/2 inches....ready for final sanding:
Attached Thumbnails
Click image for larger version

Name:	Ay75095.jpg
Views:	105
Size:	115.4 KB
ID:	1551667   Click image for larger version

Name:	Db86444.jpg
Views:	110
Size:	138.8 KB
ID:	1551668  
GarySS is offline  
Reply With Quote
Old 01-24-2011, 03:27 PM
  #14
Tee Bee
 
Join Date: Feb 2007
Location: Angleton, TX
Posts: 1,883
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Very nice!
Tee Bee is online now  
Reply With Quote
Old 01-25-2011, 12:16 PM
  #15
GarySS
 
Join Date: Apr 2002
Location: Center of the Flyover States,
Posts: 2,123
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Found a couple more pictures of my previous Corkscrew showing a different angle and closer shot of the engine/tank, etc.

Attached Thumbnails
Click image for larger version

Name:	Jh17170.jpg
Views:	128
Size:	124.2 KB
ID:	1552915   Click image for larger version

Name:	Ec89127.jpg
Views:	136
Size:	95.1 KB
ID:	1552916  
GarySS is offline  
Reply With Quote
Old 01-26-2011, 07:01 PM
  #16
Tee Bee
 
Join Date: Feb 2007
Location: Angleton, TX
Posts: 1,883
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Laminated the 1/32" ply doublers to the fuse sides. Then started working on the bulkheads and triplers. Moving right along, like an inchworm.
Attached Thumbnails
Click image for larger version

Name:	Jg14119.jpg
Views:	136
Size:	139.9 KB
ID:	1553723   Click image for larger version

Name:	Jh17005.jpg
Views:	97
Size:	94.2 KB
ID:	1553724   Click image for larger version

Name:	Jh14547.jpg
Views:	109
Size:	86.0 KB
ID:	1553725  
Tee Bee is online now  
Reply With Quote
Old 01-27-2011, 08:37 AM
  #17
GarySS
 
Join Date: Apr 2002
Location: Center of the Flyover States,
Posts: 2,123
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Looking good. What will be the choice for radio equip., engine, tank, and covering scheme????
GarySS is offline  
Reply With Quote
Old 01-27-2011, 12:27 PM
  #18
Tee Bee
 
Join Date: Feb 2007
Location: Angleton, TX
Posts: 1,883
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Thanks, Gary. I'll be using a Futaba 2.4rx and servos, a new OS .25FX, and Sullivan 6oz slant tank. I plan to use Ultracote to cover it in a Navy theme, T-28-ish. I'll keep the posts and pics coming as it progresses. I wonder what became of RCPilot66's project.

Had a bad tooth extracted at the dentist today, so I'm resting on the couch. Hope to get back to building in the next couple of days if possible.
Tee Bee is online now  
Reply With Quote
Old 01-27-2011, 03:16 PM
  #19
GarySS
 
Join Date: Apr 2002
Location: Center of the Flyover States,
Posts: 2,123
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

I was guessing an OS25FX would be nice before you posted!!!. I was wondering about the 35FX AX for mine, but it's 3 oz heavier than my Tiger 36. RCPilot66 hasn't checked in since 1/3/11 but a PM inquiry might eventually be seen by him. Ouch! about the tooth.[:@]
GarySS is offline  
Reply With Quote
Old 01-28-2011, 05:57 PM
  #20
RCPilot66
Thread Starter
 
RCPilot66's Avatar
 
Join Date: May 2002
Location: Lakeland, FL
Posts: 15
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

HELLO! It's been forever since I checked in on this thread! I'm glad to see there's other people who like the Corkscrew! I started building mine in November 2007 and it's been in storage since August 2008. Since my Corkscrew went in storage I have lived in Maryland, Tampa, FL and now Lakeland FL...home of Top Gun! I bought a house, got out of the military, am settled down and am now in the process of building my permanent shop! Once the shop is built this year, the Corkscrew is the first project to go on the board and get going just so I can limber up my building skills! Thanks for remembering me and keep up with those pictures of your new Corkscrews as they come off the assembly line!

Jerry
RCPilot66 is offline  
Reply With Quote
Old 01-28-2011, 07:02 PM
  #21
GarySS
 
Join Date: Apr 2002
Location: Center of the Flyover States,
Posts: 2,123
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Great News, Jerry!! Welcome back. Hummm, a Corkscrew Brotherhood in the making.
GarySS is offline  
Reply With Quote
Old 01-28-2011, 10:12 PM
  #22
Tee Bee
 
Join Date: Feb 2007
Location: Angleton, TX
Posts: 1,883
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Welcome back, Jerry!
Tee Bee is online now  
Reply With Quote
Old 01-29-2011, 10:51 PM
  #23
Tee Bee
 
Join Date: Feb 2007
Location: Angleton, TX
Posts: 1,883
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Went to visit my parents this evening and found a nice piece of oak while rummaging thru my dad's workshop. I cut it up to use for the engine mount rails(the plans call for maple but this should suffice).

Came home and got the engine rails installed along with the firewall, landing gear ply, and wing saddle doublers.

Not too bad considering I spent 7 hours at the flying field today with several airplanes.
Attached Thumbnails
Click image for larger version

Name:	Lj23883.jpg
Views:	120
Size:	88.7 KB
ID:	1555569  
Tee Bee is online now  
Reply With Quote
Old 01-30-2011, 11:00 PM
  #24
Tee Bee
 
Join Date: Feb 2007
Location: Angleton, TX
Posts: 1,883
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

Spent a lot of time on the Corkscrew project today since the weather was too cruddy to fly. Sanded the bulkheads flush with the fuse top. Used the scroll saw to cut the forward fuse bottom, fuel tank compartment floor, and cockpit top cover from 1/32" plywood. Glued the fuse bottom sheet over the landing gear support plate and reinforced from the inside with epoxy and tri-stock. Then I epoxied the fuel compartment floor in place. This plane is built like a tank, very strong(and somewhat heavy) structure.

Next, I worked on the engine mount setup. Drilled the rails and made some angled downthrust shims from 1/16" plywood by sanding them to a sharp edge on one end, and match-drilling them to the engine. Used 4-40 hardware. The muffler fit with no issues but I had to notch the cowl cheek for the mixture knob. I made an extension for it from music wire.

Made a trip to the hardware store for some 1/8" music wire. Bending the gear was a challenge for me as there are 8 angles to bend and making it come out symmetrical was a tedious exercise. Used a vise and hammer for most of the bending. I had underestimated the time it would take to make the gear but it came out decent enough after a lot of headscratching. Luckily, I had the wheels, collars, and gear straps on hand so I could go ahead and mount them.


Attached Thumbnails
Click image for larger version

Name:	Fd90896.jpg
Views:	93
Size:	77.6 KB
ID:	1556226   Click image for larger version

Name:	Ec88413.jpg
Views:	104
Size:	89.1 KB
ID:	1556227   Click image for larger version

Name:	Hf99724.jpg
Views:	97
Size:	104.0 KB
ID:	1556228  
Tee Bee is online now  
Reply With Quote
Old 01-30-2011, 11:04 PM
  #25
Tee Bee
 
Join Date: Feb 2007
Location: Angleton, TX
Posts: 1,883
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: RCM Plans Corkscrew

More pics of today's work. The .25FX, with it's rear-mounted needle valve mounted all the way back at the firewall, still protrudes further forward than the engine shown on the plans. No biggie, just an observation.

I believe I'll install the servos and route the pushrods, throttle cable, etc. before installing any more fuse sheeting. That should make it easier to work in there.
Attached Thumbnails
Click image for larger version

Name:	Wu60355.jpg
Views:	113
Size:	120.2 KB
ID:	1556229   Click image for larger version

Name:	Hf99811.jpg
Views:	112
Size:	115.3 KB
ID:	1556230   Click image for larger version

Name:	Nl29751.jpg
Views:	115
Size:	105.9 KB
ID:	1556231   Click image for larger version

Name:	Nk28034.jpg
Views:	109
Size:	93.2 KB
ID:	1556232   Click image for larger version

Name:	Us52877.jpg
Views:	107
Size:	88.8 KB
ID:	1556233  

Tee Bee is online now  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 11:53 AM.