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Old Oct 14, 2014, 06:55 PM
Stupid Model...
The_LeadingEdge's Avatar
United States, VA
Joined Jan 2014
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Build Log
Guillows P-47 Electric conversion

Scale Build-Off 4 - Guillows 30 1/4" span P-47 Thunderbolt

Hey all, going to start a build log for my guillows P-47. I recieved the kit from a fellow rcgroups user, and got started on it a few days ago, and its going well so far!
I had originally intended this one for a glow conversion, but I've got another project that I think I'll use for that

Hopefull specs:
30 3/4" span, smallest out of the "Giant Scale" series from guillows. Nice little kit though. These pieces definitely don't compare to the new laser cut kits, but for what they are they're not too bad!

Ill stick with the kit wood as it's fairly light and good quality and I'm running out of 1/16" stock. I plan to use most if not all of the little plastic scale add-ons just for fun.
Solid sheet (3/32") tail surfaces, and I'll make the bottom of the wings a solid 1/16" sheet. That should give me a little room to modify the airfoil to a more Clark Y shape.

AUW i'm thinking around 18oz max

Motor: Haven't decided yet. Open to any suggestions. Possibilities?

ESC: will depend on the motor ...

Prop: I'd like to see a good size one, maybe a 8/6 ACP, but again, gotta pick out a motor first

Servos: Thinking 9 gram ones. Maybe 5gr for the tail surfaces
http://www.hobbyking.com/hobbyking/s...cro_Servo.html

Controls: T/E/A/R and maybe retracts! I've been looking into some small ones recently.. Anyone have any experience with these type?
http://www.hobbyking.com/hobbyking/s..._Trunnion.html
If not, I'll just use some small GWS type mechanical ones

Rx/Tx: Oragnerx 6ch, with a DX6i. I'm starting to warm up to the orangerx stuff, and its god-awfully cheap compared to the spektrum brand of rx's

I think thats all for now. Will post some progress pics in a few minutes, dinner first.

Thanks for reading

Andrew
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Old Oct 14, 2014, 07:37 PM
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glewis's Avatar
USA, FL, Tampa
Joined Jul 2002
4,917 Posts
I'm in. This should be good!
A motor something like one of these would be good.
http://www.headsuphobby.com/Firepowe...otor-C-271.htm
http://www.headsuphobby.com/Power-Up...otor-E-540.htm
Glenn
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Old Oct 14, 2014, 09:47 PM
The "pro" in procrastination
Steve85's Avatar
Canada, ON, Kingston
Joined Mar 2004
2,895 Posts
You should think about entering it in the the Scale Build-Off that's just been launched:

http://www.rcgroups.com/forums/showthread.php?t=2265430

Steve
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Old Oct 14, 2014, 10:40 PM
Stupid Model...
The_LeadingEdge's Avatar
United States, VA
Joined Jan 2014
84 Posts
Ok first off, to Steve, thanks for bringing that to my attention. I think I'll go for it! I'll enter it tomorrow since that's when you said registration opens.

And Glenn, hey big fan here! I've read through a bunch of your Guillows builds on 'Beaver's List' and your work has really inspired me. So thanks for signing on! Also, thanks for the recommendations, I think I'll go with that second motor you suggested, the PowerUp 400 Slow fly. Which prop do you think would work best? APC 9x3.8slow fly, or 9x6... I love headsuprc, those guys have helped me in a lot of my projects.

So I've got some pics here of the jug so far. The tailpieces have been cut, and the fuse is mostly complete. I don't have any of the required electronics yet, I'll be ordering those within the week. Wings wont be started until I get the plans photo-copied, seeing as I need to cut out the outline for the bottom sheeting. Unfortunately Staples couldn't fit the whole thing onto one sheet of paper .. So I'll have to find another photo copying place.

But anyways, for the meantime that's where things stand. Please feel free to leave comments or suggestions, lord knows I could use them

Andrew



EDIT:

Apologizes for half of the pictures being upside or sideways ... I'll try to fix/avoid that in future updates
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Old Oct 14, 2014, 10:51 PM
The "pro" in procrastination
Steve85's Avatar
Canada, ON, Kingston
Joined Mar 2004
2,895 Posts
Quote:
Originally Posted by The_LeadingEdge View Post

Apologizes for half of the pictures being upside or sideways ... I'll try to fix/avoid that in future updates
No need for apologies, most of my flying pics look like that...

Steve
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Old Oct 14, 2014, 11:47 PM
Stupid Model...
The_LeadingEdge's Avatar
United States, VA
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Quote:
Originally Posted by Steve85 View Post
No need for apologies, most of my flying pics look like that...

Steve
Hahaha ok thanks!
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Old Oct 15, 2014, 06:39 AM
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Joined Jul 2002
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If it was my model this prop would be mandatory...
http://www.hobbyexpress.com/scale_4_...18582_prd1.htm
Out of stock again though. Seems they must not get many of them in stock and they sell out fast.

Framework looks good so far. Not so sure about the scale hinges, isn't that tab along the wood grain? Seems it would be fragile.
Maybe cut a notch in the stabilizer and replace the tab with one that has the grain perpendicular to the hinge line?
Glenn
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Old Oct 15, 2014, 04:55 PM
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The_LeadingEdge's Avatar
United States, VA
Joined Jan 2014
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Glenn,

That is a beautifully scale prop ..Not sure if I want to wait for them to be restocked.

And with the hinges, you're right they are going with the grain, making them rather fragile. I'm not sure if i want to replace them, because they don't seem like they are in danger of snapping. But ill keep an eye on them during build


Havent gotten around to working on her at all today. Might get a a little done tonight

Andrew
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Old Oct 19, 2014, 07:09 PM
Stupid Model...
The_LeadingEdge's Avatar
United States, VA
Joined Jan 2014
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Hey guys, just wanted to let anyone who is following know that this build is still on, I haven't abandoned it! I've just been rather busy with school, college apps, and such and the build has kind of been pushed to the back of the building board..literally.

But I am trying to get a little done here and there. The only updates are that I have added a shelf to the tail for the horizontal stab. to sit on, since there was no slot or shelf built in. Sanded flush, it looks nice and works well.

I still haven't got the wing plans photo copied. I just got back from my local Staples and it turns out their photo copier is broken ...ah well. I'll try another Staples or Office Depot (ironically the one RIGHT ACROSS FROM MY SCHOOL closed and was replaced by a halloween store ..). Anyways, I should have the wings started by the end of next week, hopefully.

I also still need to order my electronics, which I'll post links to below for reference. If anyone has suggestions as to what to use instead of a certain component, please feel free to post it.

Prop: http://www.headsuphobby.com/APC-9-x-...ller-A-620.htm

Motor: http://www.headsuphobby.com/Power-Up...otor-E-540.htm

ESC: http://www.headsuphobby.com/HURC-18-...-ESC-B-145.htm

Servos: metal gear for ailerons (one each) and elevator ... http://www.hobbyking.com/hobbyking/s...g%5FServo.html

standard 9g for rudder (might use my last spare 5g instead) ... http://www.hobbyking.com/hobbyking/s...o%5FServo.html

I thought these would be fun to use for flaps ... http://www.hobbyking.com/hobbyking/s...%5F2%5F0s.html

Retracts: http://www.hobbyking.com/hobbyking/s...%5FL130mm.html

Higher torque servo for retracts ... http://www.hobbyking.com/hobbyking/s...%5F0%5F12.html

Rx: http://www.hobbyking.com/hobbyking/s...Fw%5FCPPM.html


As always, thanks for reading,

Andrew



EDIT:

Whoops, forgot the battery ..
http://www.headsuphobby.com/111v-100...tery-F-195.htm

Is 1000mah too much..? Weight wise
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Old Oct 20, 2014, 01:26 PM
CH Spring
Canada, ON, Osgoode
Joined Mar 2008
358 Posts
I have one of these in the queue. I will be watching.

Good luck with the build.

Cheers!
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Old Oct 20, 2014, 02:51 PM
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glewis's Avatar
USA, FL, Tampa
Joined Jul 2002
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That looks like a 900 series P-51 back there on the table?
That should make a good conversion using an AR6400.
I converted the 900 series Trojan and Skyraider. Both are good flying models.
Glenn
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Old Oct 20, 2014, 03:41 PM
Stupid Model...
The_LeadingEdge's Avatar
United States, VA
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Quote:
Originally Posted by Spring View Post
I have one of these in the queue. I will be watching.

Good luck with the build.

Cheers!
Thanks, and same to you for your future build!
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Old Oct 20, 2014, 04:02 PM
Stupid Model...
The_LeadingEdge's Avatar
United States, VA
Joined Jan 2014
84 Posts
Quote:
Originally Posted by glewis View Post
That looks like a 900 series P-51 back there on the table?
That should make a good conversion using an AR6400.
I converted the 900 series Trojan and Skyraider. Both are good flying models.
Glenn
Right, good eye haha. I started to build it just as a static model, but as it started to come together, I realized what a fun and easy build this would make. I haven't started the wings yet, stopped building it after the tail surfaces were finished. If I finish the P-47 with enough time left in the contest registration, I might throw it up as well.

I saw your two build-logs with the 900 series, they both turned out really nice! Personally, I'm not a huge fan of the way they are constructed .. I built the DeHavilland Chipmunk out of the same series and it was a painful build to say the least ..I do have a question about your Skyraider build though; I noticed that you changed the angle of attack (incidence..same thing?) on the trailing edge of the wing. Does this really affect flight performance so much that it needs to be addressed? I did notice that my Jug has a rather positive incidence on the leading edge of the wing. Is it already too late to change it, considering the progress made on the fuse?

Thanks

Andrew
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Old Oct 20, 2014, 05:57 PM
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glewis's Avatar
USA, FL, Tampa
Joined Jul 2002
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The 900 series wing incidence is set up for rubber power. It will work as is, but will require a LOT of down thrust to compensate.
Isn't your model set up for glow engine power? I think it shows control line and rc installations on the plan. The incidence on the ic powered models is set up correctly and I wouldn't change it.
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Old Oct 20, 2014, 08:51 PM
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The_LeadingEdge's Avatar
United States, VA
Joined Jan 2014
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Alright thanks, I just wasn't sure. I had seen other Guillows builds where this was an issue, wanted to avoid any unwanted pitching when throttling up
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