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Royal Zero Kit Build into Rufe

Old 10-12-2012, 05:11 PM
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Default RE: Royal Zero Kit Build into Rufe


ORIGINAL: chistech

I used the wingspan of the 40 size Zero and not the Rufe. The Rufe has a 1490 span. By comparing 40 zero to 60 zero I should be OK I believe.
This where I get confused, how can the have the same scale and wing span when one should be a bigger span than the other, if the Rufe and the 40 size are truly both 1/8 scale, the Rufe should have about a 9% larger span

MTK-001 Mitsubishi A6M5 Type 0 model 52 "ZERO" or "ZEKE" FIGHTER 1:6 WS 1592mm 3.2- 3.5 Kg .60 2 cycles engine

MTK-002 Mitsubishi A6M3 Type 0 "ZERO" or "ZEKE" FIGHTER model 22
1:8 WS 1480mm S 37,5 dm² Weight 2,6- 2,9 kg .40 2 cycles RC 3 - 5 servos

MTK-004 Nakajima A6M2-N "Rufe" FLOATPLANE: FIGHTER based on A6M-2 Model 11 with modified tail and floats.
1:8 WS 1480mm S 37,5 dm² 3,2 -3,6 kg .60 RC 4-5 ch.


The way I've figured doing it is to add 9% to the a6m5 60 size wing span, then do the math compared to the Rufe, try that and compare realitive to the three views and see what you get

Old 10-12-2012, 05:16 PM
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chistech
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Default RE: Royal Zero Kit Build into Rufe

I would think they are the same. The Rufe had a larger wingspan in full scale vs. the zero and so does the 40 Rufe kit vs. the 40 zero kit.
Old 10-12-2012, 05:25 PM
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Default RE: Royal Zero Kit Build into Rufe

The numbers I quote say they're the same, both 1480mm,, you posts say 1480 and 1490,, 10mm isn't close to a 9% difference

One of use has the wrong numbers?? see why I'm confused []
Old 10-12-2012, 06:57 PM
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Default RE: Royal Zero Kit Build into Rufe

My Rufe kit is 1490 not 1480.

The 40 size Zero @ 1480 comes out at 38.85' (a little larger than the 36'1" for the 5 model)

The 40 size Rufe @ 1490 comes out at 39.10' (very close to the actual 39' 4.5")


So it appears that the 40 Zero has a more generous wing than scale and the Rufe kit is a more to scale wingspan.

Something doesn't work right on the 60 size zero. @ 1592 mm x 6 equals 9552mm. This works out to 31.3' (way short of the 36'1")
It turns out the 60 size Zero is not 1/6th scale but 1/7th scale. 1592 x 7 equals 11144mm or 36.5'

Using your 9% formula on the 1592mm span does bring it to 12147mm or 39.8' (very close to 39' 4.5" of the Rufe)
Using a 8.5% formula it brings it to 12091mm or 39.6' (even closer to scale)

So, a 60 size Rufe would have a wingspan of 1735mm using the 9% formula.
A 1727mm span using the 8.5% formula.

In order to bring the 40 Rufe's span up to the 1727mm one needs to add 16% which brings the 1490mm to 1728.4. I've been doing a lot of math and not sure now if this is correct but it seems that way. The problem this formula might have increased the fuse size also. Can someone tell me the length of the SR. 60 size Zero by the plans and I will measure the fuse on the Rufe plans increasing the plans by the fuse length.
Old 10-12-2012, 07:04 PM
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Default RE: Royal Zero Kit Build into Rufe

I think I might have a scan copy in my other computer, I'll see if it says anything fuse size on the plans



Edit, Looked at the Scan and can't make out the info in the legend
Old 10-12-2012, 07:14 PM
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Default RE: Royal Zero Kit Build into Rufe

Done a little more math.


A 1/7th zero should have a span of 1575mm or 36.1' (1592 is generous over scale)

Now, using the 9%, it comes out to 1716.75mm for the 60 size Zero to become a Rufe's wingspan.

In order to make the 40 size Rufe a 60 size the 1490 span still needs 15% to become 1713.5mm
Old 10-13-2012, 03:01 AM
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Default RE: Royal Zero Kit Build into Rufe

Yeah, see this is why I suggest comparing fuse lengths, not wing spans or scale%,, those might not be 100% accurate as to scale 3-view,, And as you know, when setting up a float plane, float length is relative to the fuse length anyway.

Now with that 15% you've determined, add that to the fuse length of the Rufe (say spinner back plate to tail) and see if it match close enough to the length of the 60 size A6M5 fuse, if they match up you have your multiplier.
Old 10-13-2012, 09:44 AM
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Default RE: Royal Zero Kit Build into Rufe

Ted,

Here are some scans from a Maru Mechanic three view I have if any body is interested. It shows the Wingspan on the Rufe to be 12,000 mm. I havn't posted photos in a while so hopefully I still remember how to do it.

Thanks for putting me on the list.

James
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Old 10-13-2012, 06:10 PM
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Default RE: Royal Zero Kit Build into Rufe

Going by Wizard's 12000mm Rufe span it means the Sr. Zero's 1592mm span needs to be increased 7.69% to reach the 12,000. The wingspan if exact scale would then be 1,714.2mm at 1/7th scale. Doing the math previously in another post, it is pretty close so no need to do it again. Will look at Gerry's Sr. Zero plan and my Rufe plans then compare the fuse lengths. This should then help determine what percentage of increase needed like Scale only for me suggested.
Old 10-14-2012, 07:34 AM
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Default RE: Royal Zero Kit Build into Rufe

Ted,

There is no dimension called out on the three view(actually a 5 view) for just the length of the fusalage, not including the Float. The text of the book says the A6M2 Fusalage is 9,050 mm in length, but when I scale the three view of the rufe it works out to be 8,694 mm roughly, which would be 342.28 inches full scale. So at 1/7th scale the fusalage should be between 49.10" and 50.89" depending on which figure you go with. If you are interested in a copy of my 5 view, PM me your e-mail and I'll take it to work where I have a better quality scanner and set you up with a set.

Thanks,

James
Wizard61
Old 10-17-2012, 04:59 PM
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Default RE: Royal Zero Kit Build into Rufe

Hello all,
I haven't been able to get to the print shop yet as this week is very busy. It is the week before our club's float fly and I am the coordinator. It is also the first week of deer hunting here in MA and I'm in a tree first thing in the morning and last thing at the end of the day. I will be going next week when all calms down. Also trying to get a plane delivered to Johnson City TN from MA and not having a good time getting that done. I will let everyone know when the plans are all set.

Thanks, Ted
Old 10-17-2012, 05:17 PM
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Default RE: Royal Zero Kit Build into Rufe

full schedule, haven't been in a tree stand in quite a while, sure do miss it. good luck!
Old 10-23-2012, 11:17 AM
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Default RE: Royal Zero Kit Build into Rufe

Hello All,
Getting ready to go to the print shop. The Royal SR Zero has a fuse length from front of cowl to rudder post of 1105mm. The 40 size Marutaka Rufe has the length of 991mm. I need to increase the 40 size by 11% or an additional 109mm to bring it up to 1100mm. This seems more than the wingspan increase needed. Increasing the 40 size 1490mm wingspan by 11% would bring it up to 1654mm (larger than than the SR zero's 1592mm span). Actual scale wingspan is 1712.2mm, which means my measurements are right in the middle so I guess we're still in the right place.

This is the plans list:

40 size (original) Everyone wants rolled in tube. Please reply only if you want folded.
Firepower RC
Corsair 29
Military Planes
Wizard 61
Scale Only 4 Me
Zero Mad

60 Size:
Gerry D
Big Tim

Thanks, Ted
Old 10-23-2012, 01:55 PM
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Default RE: Royal Zero Kit Build into Rufe

Please add me to the 60 size list as well, if you don't mind
Old 10-23-2012, 07:02 PM
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Default RE: Royal Zero Kit Build into Rufe

Ok, I got all the plans made up today. The 11% enlargement was spot on as the cowl to rudder post comes out right at the 43.5" matching the SR Zero's measurement. So those of you getting the Royal SR size Rufe plans will find that you could lay the Rufe plans right over your Zero plans and the fuses will virtually line right up. The wing comes out at 64" or so too. Of course, because it's an enlarged plan the rib spacing is larger. The 40 Rufe has 9 ribs including the tip rib, excluding the center rib and SR Zero has 10 ribs. The SR Zero plans only show a flap outline but the Rufe plans show a complete split flap make up. I believe everyone will really like these plans. I do have enough tubes for everyone and I think the simplest way to do this will be to offer them for sale in the "Buy & Sell" section. This way it will give me everyone's correct addresses and we can all leave each other feedback. I had decided yesterday not to take PayPal anymore because of a dispute with them but I will if it will make it easier for all. The plans cost me $9 per sheet and the tubes are $2 so $20 will cover the cost. If using PayPal you will have to give the 3% additional as I refuse to give those SOB's my money. Once I have everyone's addresses I will go to the PO and get the shipping costs for all then send the invoices. You can also send me money orders or bank checks if you want to avoid the fees. Does this sound good for everyone?


Thanks, Ted
Old 10-23-2012, 08:10 PM
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Default RE: Royal Zero Kit Build into Rufe

Sounds good to me Ted. So it will be $20.60 plus postage for me if paying via PayPal? I provided my address in the PM I sent, but if you need me to send it to you again, just let me know.

James

Wizard61
Old 10-24-2012, 03:40 AM
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Default RE: Royal Zero Kit Build into Rufe

How ever you want to do it Ted, Thanks for going to all the trouble
Old 10-24-2012, 04:16 AM
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Default RE: Royal Zero Kit Build into Rufe

I will make up a add later today in the "Buy & Sell" section in Airplanes, War birds. Took another look at my slip and it turns out the larger 60 (SR size) plans cost me $10 a sheet. They charge by square ft of paper and that is why each sheet cost a dollar more. I will put that in the add. I also let Brian @ Royalhfarms, the guy who's making laser cut Royal short kits about the 11% increase to bring the 40 Rufe up to the 60sz SR Zero. I am sending him my Rufe kit and he will be duplicating it so he can make a short kit of the Rufe. He should also be able to make short kits of the floats enlarged the 11% for all the SR kits.

Thanks Guys,
Ted
Old 10-24-2012, 01:19 PM
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Default RE: Royal Zero Kit Build into Rufe

Add has been posted in the "airplanes/plans" section. Please note I currently have only one set of enlarged plans on hand and they are intended for BigTim. If you want an enlarged set it will be a week or so before I can get back to the print shop to make more enlargements.

Thanks for everyone's interest and I hope a bunch of us make some Rufes!
Old 10-24-2012, 01:31 PM
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Default RE: Royal Zero Kit Build into Rufe

Thanks Ted,

I sent you a PM, but I will post to your add, I will definately want that 11% enlargement as well.
Old 10-24-2012, 02:38 PM
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Default RE: Royal Zero Kit Build into Rufe

Short cut.. http://www.rcuniverse.com/market/item.cfm?itemId=878200

My offer has been sent,, thanks
Old 10-25-2012, 06:31 PM
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Default RE: Royal Zero Kit Build into Rufe

Hello All,
There is no more add as RCU has decided I'm a vendor even though I am offering the plans at cost and removed it. Just email me with what you want and I will get back to you. I currently have both sizes of plans as I went and copied more of the 11% enlarged ones. My email is: [email protected]. Not trying to go around the system but I'm not making any money and don't want it to cost me either.

Thanks, Ted
Old 10-26-2012, 01:31 PM
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Default RE: Royal Zero Kit Build into Rufe

Thanks again Ted,

About the short kits from Royalfarms, do you think he will be offering the kit first to us directly, or do we have to wait until its posted on ebay?
Old 10-27-2012, 05:20 AM
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Default RE: Royal Zero Kit Build into Rufe

I sent a couple of emails to Royalhfarms and haven't heard back from him. I suspect he's very busy. I can't tell you how he conducts his business but I would think if he knows he already has short kits sold, why would he pay the EBay fees to sell them there when he could sell them direct to the buyers. This thread is actually advertising for him. I do have his phone and will probably call him next week as I've been straight out with just about everything. Once I talk with him and know he's ready, I will send the Rufe kit to him. Trying to get all these plans shipping costs figured out, in tubes, then mailed is somewhat of a chore when your business isn't going to the PO everyday. I currently have quite a few members who requested plans that I have put in tubes and contacted but they haven't gotten back to me about purchasing them. It's a fair amount of money I have out, spent to help out fellow modelers, who now to seem to have disappeared. Live and learn. Looking at the price plans services charge for common aircraft, these rare Rufe plans are cheap.
Old 10-27-2012, 05:37 AM
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Default RE: Royal Zero Kit Build into Rufe

That sucks, I know we just ordered T-shirts and our Club Pres was insistent he get money up front for each shirt ordered for just that reason,,, People Flake

No hurry on the shipping,, get yourself squared away for that weather,, Model airplanes can wait

good luck

p.s.
I almost always use USPS through my Paypal acct. and print the labels at home, they'll pick packages up for free 6 days a week, no need to drive there

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