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-   -   The Scratch Plane featured in Fly Rc (https://www.rcuniverse.com/forum/scratch-building-aircraft-design-3d-cad-174/7250867-scratch-plane-featured-fly-rc.html)

jg95762 05-04-2008 01:48 PM

RE: The Scratch Plane featured in Fly Rc
 
1 Attachment(s)
Here are some more photos. In the first one I was trying to see if the C of G was anywhere close. With the 1320mah battery as far forward as I can get it the C of G is pretty close. The thing I had the most issue with was getting aileron linkages set up - next time it will be easier.

The plane is now complete, but I am currently too chicken to fly it! It is fairly windy here so I will probably wait till next weekend.

Has anyone finished there plane and flown?


jg95762 05-04-2008 01:50 PM

RE: The Scratch Plane featured in Fly Rc
 

Larrypaul - why did you go with the 7x6 prop? Also, do you have pictures of the landing gear?

jg95762 05-17-2008 12:31 PM

RE: The Scratch Plane featured in Fly Rc
 
I flew my Scratch for the first time this morning and it flew extremely well. When I hand launched it I was expecting it to go straight out and maybe even drop the nose, but instead it went straight up at a 45 degree angle! Needed hardly any trim. Glides really well, and is really fun to fly - considerably more agile than my T28. The landing was good; no damage! I am really stoked at this point - my first scratch built not only flies but flies really well. I think I am really hooked on scratch building!

lrglnman 05-17-2008 07:20 PM

RE: The Scratch Plane featured in Fly Rc
 
Thats great JG!
Since I got this thread started I have all but stalled my project build[:o] I have a wing built and built a fusealage but I mess it up and so I will start another Monday nite. Several guys in our club has built one and flew theirs . They said it needed a bit of down thrust and move the cg back a bit. I flew one and it flew great.

lrglnman 09-20-2008 11:38 PM

RE: The Scratch Plane featured in Fly Rc
 
1 Attachment(s)
Well I finally got her done this evening. I will test tomorrow afternoon after I do alot of praying. Its been along time and due to some health probs I go her done!! The pic does not do her justice . will post an update asap.

jg95762 09-28-2008 09:23 PM

RE: The Scratch Plane featured in Fly Rc
 
Hey Lineman, Glad to hear you finally finished her! She looks great. Did you fly her yet??

lrglnman 09-28-2008 09:40 PM

RE: The Scratch Plane featured in Fly Rc
 
Well, got several flights in her and it is a real fun plane. I am running the Atlas 2312/26 from Hobby Lobby with a E -Fight 20 amp speed control and a 2100 mah battery from FMA Direct, Cell Pro brand. HS55's all around and a 9-6 APC prop. Has good vertical but not unlimited. It will scoot with wide open throttle. I think it's a keeper. The only thing is you got to be careful with the prop on landing or it will break off. a prop saver is a must. or set the break on the speed control and watch the direction of the prop on landing. i made the wing in one piece and installed 2 servos in the wing. I hate torque rods. I work just 3 min from our field so this plane is going to stay in my office so I can run to the field on lunch to vent some steam. :D

jg95762 09-29-2008 08:20 PM

RE: The Scratch Plane featured in Fly Rc
 
Great to hear that it went so well.

I have a Hacker 20-22L, Eflite 25A. Originally I had a TP 1320mah but I think I was running to close to 100% of the max C rating and only got about 50 cycles out of it. I now have a couple of different 2100mah (Thunder Power and First Flight I think) and a Parkzone 1800mah. All three of these batteries move the CofG forward about an inch but it still flies well. The prop is a 9x7.5 SF and I have broken two or three over the 100 or so flights in the last 4 months. I have the ESC brake on but I am landing in weeds or hard dirt which is not very forgiving. I have tried a 10x4.7 and that definitely generates more lift with less top speed. With over 100 flights I have only crashed badly once, but had quite a few close calls. When I crashed a big cloud of dust came up and I was sure the plane toast. Fortunately it hit straight on and did not cart wheel. The firewall pushed out, and the wing pushed the former out and the nylon bolt broke as it was supposed to. It took about 3 - 4 hours to rebuild and it is a good as new - the 1/64 ply doublers really saved the fuselage.

I have actually built a second plane to the point of covering but haven't finished it - I really like the wood working part but dislike putting the ultracoat on. I have a couple of different BP motors and a BP ESC ready to go. One of the motors is quite a bit more powerful. I have various props to try also. The two servo thing makes sense to me - the aileron linkages are a pain to get straight, although on the second plane I did much better than the first.

I am considering putting landing gear on but haven't gotten around to it.

This is only my second RC plane and it has been a great learning exercise from both the building and flying standpoint.

I fly about five minutes from my house so I frequently disappear after dinner or on the weekend and get one or two flights in - it is a great stress relief.

lrglnman 09-29-2008 09:46 PM

RE: The Scratch Plane featured in Fly Rc
 
the great thing about this little plane is its easy to repair if something bad happens. so far I really like my plane. sounds like your set up is working good for you. The ultracoat is a bit intimadating but after you do a few planes it gets better. I found That i don't mind it as bad now that i have covered several planes and my skills are getting better. I had several :)good comments on my scratch my head swelled a bit.:) I am thinking of building a wing with diheadral in it just to change things up a bit.

jg95762 09-30-2008 08:27 AM

RE: The Scratch Plane featured in Fly Rc
 
Doesn't your wing have any dihedral? Mine has whatever the plan called for. Maybe I should build one without any dihedral to see how that flies. Have you thought about landing gear?? There seems to be no easy way to make the tail wheel steerable but I am not sure how much of an issue that is since I have not flown a tail dragger.

On a different note - I am seriously considering buying the new Eflite Pulse 25 as my first ARF and a somewhat larger, low wing plane, that is a tail dragger.

lrglnman 09-30-2008 09:27 PM

RE: The Scratch Plane featured in Fly Rc
 
I have thought about installing landing gear and may yet. you dont need it for take offs just landing so you really dont need anything but a piece of 1/8 inch lite ply shaped into a tail wheel . Yes the wing is flat and flies great. the rolls is real nice.
The pulse will be a super plane. very close to a 4 star. it should fly great.

nuang12345 05-24-2009 10:50 PM

RE: The Scratch Plane featured in Fly Rc
 


Hi, everyone ..May be i am a bit late http://www.rcuniverse.com/forum/js/f...unge_smile.gif....but late better than northing ....i am decided to build this Scrtch Plane as my first nitro engine planes as my 1st nitro plane.....&amp;i got a OSLA10 engine with me...my question is this LA10 suite for this plane &amp;any additional enforcements needed formy build ? Please advise if anyone done this plane with Nitro engine setup ...thanks</p>

CptDan 05-25-2009 12:29 AM

RE: The Scratch Plane featured in Fly Rc
 
1 Attachment(s)
The Scratch is the design of Jim Vigani, it is now being kitted. The attachment is the full size PDF plan that Jim sent me last year. Also included is the Logo in Red that I made a decal of and put it on the wing.

nuang12345 05-25-2009 01:24 AM

RE: The Scratch Plane featured in Fly Rc
 


Hi, CptDan.....well done...is nice to know what your power setup &amp; how you fix your landing gear ? cos is not shown in the plan...!! varu nice covering u have done....!! isn't Monokote ?

thanks
</p>

CptDan 05-25-2009 11:25 AM

RE: The Scratch Plane featured in Fly Rc
 
The wing is white Oracote, the fuse is painted. I used a EFlite 450 with a 2100 TP lipo. I fly from asphalt or very hard surfaces (CA) and the idea of belly flopping is kinda hard on the fuse. I can't remember what LG I used. I did put some ply in the bottom of the fuse and braced the inside of the fuse to strengthen it. I also put my Aileron servos in the wings instead of torque tubing them. It flys very well.

Furyflyer2 05-25-2009 03:22 PM

RE: The Scratch Plane featured in Fly Rc
 
Kits will be available at http://3dxhobbies.com in a few weeks.

jvigani 05-25-2009 07:37 PM

RE: The Scratch Plane featured in Fly Rc
 
1 Attachment(s)
Great to find this thread. I'm really glad so many people are enjoying this little plane. Re: gas powered version: I built one with a glow engine for the Fly RC Article. Power was a Norvel .074. Flies great. Here's a few pictures of it.

nuang12345 05-25-2009 08:27 PM

RE: The Scratch Plane featured in Fly Rc
 


Hi, thanks for the pic and tips....vary nice build...any advise if i use my OS LA10 engine (1.76cc ) on this little plane ? isn't too powerfull for this build ? is nice to know what is ur AUW ? As a beginner on Gas power planes i am bit worries this plane may too hot for me....http://www.rcuniverse.com/forum/js/f...ngue_smile.gif..

thanks</p>

jvigani 05-26-2009 05:47 PM

RE: The Scratch Plane featured in Fly Rc
 
I sure the air frame can handle the power.  My main concern would be the weight.

hansylin 07-10-2009 09:14 PM

RE: The Scratch Plane featured in Fly Rc
 
1 Attachment(s)
Twas the night before the the first flight....
This is my first build from scratch and I am excited about flying this plane...
in a day or two i will actually get out of the house and fly have to do some last minute checks...

jg95762 07-10-2009 09:54 PM

RE: The Scratch Plane featured in Fly Rc
 
looks great. Very visible! Good luck with the maiden flight.

jvigani 07-13-2009 11:01 PM

RE: The Scratch Plane featured in Fly Rc
 
Looks great. Good luck on your maiden flight.

jvigani 09-15-2009 02:15 PM

RE: The Scratch Plane featured in Fly Rc
 
1 Attachment(s)
For you Scratch fans, I built a Super Scratch. 60 inch span, 650 watts of power. Flies just as great as the original.

jg95762 09-16-2009 12:34 AM

RE: The Scratch Plane featured in Fly Rc
 
Looks great. It looks like you put a lot more ribs in the wing and used built up tail feathers and fuse rather than the sheeting.

jvigani 09-16-2009 08:49 AM

RE: The Scratch Plane featured in Fly Rc
 
1 Attachment(s)
Yeah, I changed the structure on this one because of the size as I wanted to keep it light. Here's some pic's before I covered it.

jg95762 09-16-2009 09:34 AM

RE: The Scratch Plane featured in Fly Rc
 
Nice. What motor/ESC/battery combo did you go with?

jvigani 09-16-2009 09:58 AM

RE: The Scratch Plane featured in Fly Rc
 
The motor is A BP U3520-6, a Turnigy 80 AMP ESC, and a 4S2P - 4400 MA battery all turning an APC 12x8E prop. I'm also using a separate 5 amp BEC. System puts out between 650 and 675 watts.

lrglnman 09-22-2009 06:23 AM

RE: The Scratch Plane featured in Fly Rc
 
quick note on my scratch, flies great. installed a axi 2212-26 and using a 2100 lipo great flight times.

cjOregon 01-31-2010 11:18 PM

RE: The Scratch Plane featured in Fly Rc
 
Boy, sure wish I'd have known of this thread when I made my "Scratch"! Really enjoyed building and learning. Ordered the magazine with the Large Scratch in it. Have a Geared Astro 25 that would fit well in it! Just recently rebuilt my original scratch, took off the landing gear and put a folding prop on it, fly it at a nearby park and belly land in the grass. Was a pivitol plane for me.

jg95762 02-01-2010 12:37 AM

RE: The Scratch Plane featured in Fly Rc
 
Pivotal is a good word. The scratch was my second plane, following a park zone T28. The sense of achievement I got from building and being able to fly the plane were enormous. I flew the first one a ton, crashing and repairing many times. I built a second and have hardly flown it. Am now flying 40 size gas planes and recently picked up a used Venus 2. The skills l learned building the Scratch have really helped. I have a Eflite Power 32, and a 60 Amp ESC looking for a new home; maybe I should build the large scratch. Which magazine were the plans in?

jvigani 02-01-2010 11:56 AM

RE: The Scratch Plane featured in Fly Rc
 
Super Scratch is in the January 2010 issue of Flying Models.

jg95762 02-01-2010 12:10 PM

RE: The Scratch Plane featured in Fly Rc
 
Thanks. I was not aware of that Magazine. Looks interesting - they have a Hughes H1 in the February issue. I love the looks of the Hughes.

cjOregon 02-15-2010 03:58 PM

RE: The Scratch Plane featured in Fly Rc
 
Am trying to see if a partial kit is available, am going to make the Super Scratch either way, sure would be faster with a partial kit though! The original Scratch is the best plane I've personally ever built. Boy do I dish out punishment to it <groan> and it keeps coming back for more. Overhauled it a few months back. Also really liked the Flying Models magazine I ordered to get Viganis article. Some magazines I reread more than others, Flying Models seems to be good like that. Will consider starting a Super Scratch thread when I begin if someone else hasn't already done so.

jvigani 02-15-2010 04:16 PM

RE: The Scratch Plane featured in Fly Rc
 
Yes, a short kit will be available very soon from 3DX Hobbies. I'm cleaning up the cut sheet files now. Basically, have to put some part numbers on the pieces so it's easier to figure out what is what.

jvigani 03-17-2010 10:11 PM

RE: The Scratch Plane featured in Fly Rc
 
1 Attachment(s)
Thought you Scratch fans would like to see the latest edition, the Micro Scratch. Made from a single sheet of 1/32" balsa and powered by a Park Zone system taken from a crashed Park Zone Cessna. 15" wing span, 42 sq" wing area with ready to fly weight of 17 grams. Initial flights have been very promising.

Furyflyer2 03-18-2010 01:22 AM

RE: The Scratch Plane featured in Fly Rc
 
Short kits- http://stores.3dxhobbies.com/-strse-...Kit/Detail.bok

weskel 03-19-2010 05:58 PM

RE: The Scratch Plane featured in Fly Rc
 
I like the looks of the micro electric one you made, could you post up some more specs like length etc.

I have all the stuff to build one and I think I will do it this weekend.

jvigani 03-22-2010 11:03 AM

RE: The Scratch Plane featured in Fly Rc
 
Sorry for not getting back sooner. I was away. Anyway, the wing span is 15". The chord is 2.9" being formed from a 3" wide sheet. Overall wing area is 42" sq. The overall length is 11.25" The fuselage inside width is 1" under the wing. The stab has a span of 5 5/8".

Furyflyer2 08-05-2020 07:00 PM

Kits are back in stock you can find them at http://3dxhobbies.com


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