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Royal B17 build

Old 10-06-2012, 11:52 AM
  #1  
tardster
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Default Royal B17 build

I just started my build of a Royal 78"ws B17. I got the plans off ebay, took them to staples and got a couple copies made and also had them save them on a thumb drive just in case I need them later on or if someone wants a set. I talked to Alex from a-mmodels and he laser cut the kit for me, price, turn around and all that was excellent. I already have 4 OS FS 30 4 strokes, Cowls, radio equip and the canopies are on their way. I haven't yet decided on retracts or not or flaps, I'm pretty sure I'm going to do the flaps if I can find a good thread on here to guide me lol. I've already started the fuselage and will be posting pics when I can so if anyone has any experience with this I'd love to hear from ya...
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Old 10-07-2012, 03:27 AM
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Default RE: Royal B17 build

Ok guys don't laugh to much but heres some pics of what I got done yesterday hope ya like...
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Old 10-07-2012, 06:21 AM
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Default RE: Royal B17 build

Here's a little motivation for you. This is actually a fiberglass copy of the Royal B-17, built with electric motors. Weighs 12lbs, and flys very light and easy on the sticks. No flaps, and has Spring Air retracts.
Heres the build thread: http://www.rcgroups.com/forums/showthread.php?t=1417449 and the vid of my maiden flight this weekend: http://www.youtube.com/watch?v=YQvTB...ature=youtu.be
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Old 10-07-2012, 07:47 AM
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Default RE: Royal B17 build

TLH101, where did you get that from, I take it, it was an ARF? I like it, you wouldn't happen to know where to get scale size pilots and stuff for it would you?
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Old 10-07-2012, 08:02 AM
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Default RE: Royal B17 build

It was an old Mey Tech kit. Have not been able to find any info on the kit. It was a direct splash from a Royal/Marutaka B-17. It was not even almost an ARF. Took all my years if building exeperience, and over a year to complete.
The models are 16th scale, so scale pilots & crew will be hard to come by. If you don't want a lot of detail, small plastic "army men" would pass. 4 1/4" tall would be about right size.
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Old 10-07-2012, 08:33 AM
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Default RE: Royal B17 build

Ah that figures, I've been having a time of it myself trying to find stuff on the Royal Plans. I've gotten the instructions but they are so dark from people making copies so I've been using the plans themselves mostly. I need to find some retracts if I'm going to use them, which retracts did you use if you don't mind me asking since these are almost the same.
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Old 10-07-2012, 10:20 AM
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Default RE: Royal B17 build

I used a set of Spring Air retracts with 5/32 wire struts and Robart strut covers. I mounted the plates for the gear at the correct angle for the down location and then put in stops to have then retract to the correct position. Since air holds them up, they can be stopped anywhere. If you get new retracts, 70 degrees is about the correct angle for a B-17. I have a 120" Wescraft that I will be using 70 degree Spring Air 400 series retracts in.
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Old 10-07-2012, 02:17 PM
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Default RE: Royal B17 build

Ok this retract stuff messes me up lol, which kind (not name brand or mechanical) but actual type would I use on this. I had a set in my P51 that went up sideways but these would go forward wouldn't they. I would have done them like I did the the P51 but they were listed as options and with this I just got the plans so I'm lost.
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Old 10-07-2012, 02:49 PM
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Default RE: Royal B17 build

The Spring Air retracts that retract side ways for 90 or 85 degrees can be used to retract forward for your use. Just rotate the wheel and strut 90 degrees. I've done it myself. You probably do not need the full 90 or 85 degree retract angle as one of the posters mentioned. Dan.
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Old 10-21-2012, 03:31 AM
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Default RE: Royal B17 build

Quick update guys n gals, work, wife, kid, army and school have had me busy lately but I did get some done to the B17. Here are a couple pics of what I've gotten done so far, more to come soon. I got the fuselage almost done along with the wing, using water to bend the sheeting has worked out good so far and I haven't seen any warping yet. I'm still waiting for the cockpit kit and canopy set to get here, hopefully they will make it through customs sometime before I die but until then I start on hooking the linkages up for the servos and stuff. Quick question for you guys, should I go ahead and use the bellcranks or servos, I do plan on doing flaps on it. I'm mainly worried because so far all the micro servos I've looked at don't have the same power as the regular servos and that kind of scares me, I'd hate to build this then crash it because of that lol.
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Old 10-21-2012, 05:40 AM
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Default RE: Royal B17 build

Very nice work. Thank you very much for your service to our country, and be safe.

Now if it was me, I would not use the bellcranks. I would go with a separate servo for each half.

Casey
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Old 10-21-2012, 06:45 AM
  #12  
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Default RE: Royal B17 build

Hi!
Keep the weight down and you will have a nice flying four engined bomber.
I have scale props (Hamilton standard) 10x4,5) suitable for the OS FS .30. Props are made in carbon fiber and made for flying. Made those for my Marutaka DC-3.
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Old 10-21-2012, 07:59 AM
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Default RE: Royal B17 build

Do you think it would be safe to use a micro servo for the ailerons and flaps or use standard servos mounted sideways?
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Old 10-21-2012, 08:11 AM
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Default RE: Royal B17 build

I used HiTec HS-85s on each of the ailerons and and one each on the elevator halves. Being electric, I don't have have the vibration issues, so I don't know if they will work for you.
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Old 10-21-2012, 12:28 PM
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Default RE: Royal B17 build

2xHS-85MG will have much more power than the single standard servo listed on the plans from 30 years ago running through bell cranks. Make two hatches under the wing with short straight linkages. I used these servos on my Royal B-25 for ailerons.
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Old 11-10-2012, 04:04 PM
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Default RE: Royal B17 build

Here's a quick update guys, I got abit more done, hope ya like...
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Old 09-17-2016, 10:57 PM
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Interesting no posts in 4 years, did you ever get your B-17 flying? I have three Royals, one in the Box, one built, and one enlarged 150% and it is about 80% complete. my standard size built model needs to be fitted with retracts and flaps as the original Builder didn't do that.
I want to go with century jet retracts, bit after reading about how long people hsve waited i might just make my own! I am a machinist after all and have a background in computer aided design. Anyways my choice of motors are the OS 20 four stroke I have 4 that I bought on eBay and I have rebuild kits for each as well as a hobbico compression gauge.

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Old 02-24-2019, 08:53 AM
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Default Progress on Royal B-17

I just now found this old post. How did I miss this one?
. It was at the same time as my Royal B-17 build.
. Mine is going to be back on the bench soon.
. It would nice to see this one resurrected as well.
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Old 11-23-2019, 10:57 PM
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same here, don't know how I missed it too. I would like information for the cutting service so I can build one
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