Platt Zero Build Thread
08-15-2014 | 10:20 PM
#82
My Feedback: (3)
Joined: Oct 2004
Posts: 54
Likes: 0
Received 0 Likes
on
0 Posts
From: Northern,
VA
Hey Skip,
I haven't seen you at Hobby Hangar or the field lately...You must be busy.
Do you have any pix of your plane?
Bob I.
I haven't seen you at Hobby Hangar or the field lately...You must be busy.
Do you have any pix of your plane?
Bob I.
Last edited by NUMB LOCK; 08-15-2014 at 10:22 PM.
10-06-2017 | 06:41 AM
#83
My Feedback: (10)
Originally Posted by [email protected]
On to the wing...
I set up my adjustojig to build this wing... First problem... the wing is too wide for it if I built the ADM5 version. By doing the rounded tip A6M3, I could have fit it, but I am ornery... and wanted the A6M3, but not with a 6" solid balsa wing tip...
After studying things a bit, I realized it was possible to simply extend the 5/32" jig rods beyond the outer limit of the jig for the outside ribs. This seemed to work out OK. The second picture shows more clearly how the oustide ribs extend beyond the jig. With this setup, I sacrificed being able to completely invert the wing on the jig, but it worked out fine.
To do this, however, I had to figure out a way to support the center rib without the rods, so I glued on a jig that fit neatly into the adjusto jig's center slot. Looking back on this, I think it would have been smarter to get longer rods because at one point in the build, I realized that the center rib was slightly misalligned, which reguired some sawing a regluing, regrettably.
Dave's plan calls for building each half of the wing at a time on the plan using a piece of balsa to raise the trailing edges to the right washout height.
It tooka while to settle on where to drill the jig rod holes to allign things according to plan, and it also took awhile to figure out what dihidral to set up on the jig (forced me to recal some junior high geometry) since the hight at rib 11 on the plan is <u>the height above the plan plane to the bottom of the rib</u>. On the Adjustojig, I needed to figure the equivelent heights based on the "jig dowel points" which are not at the bottom of the rib... this confused me for a while... it took a couple extra days of thinking time to figure it out.
Picture 4 shows the ply/basla dihidral brace with the pencil marks I drew to maintain sanity...
I set up my adjustojig to build this wing... First problem... the wing is too wide for it if I built the ADM5 version. By doing the rounded tip A6M3, I could have fit it, but I am ornery... and wanted the A6M3, but not with a 6" solid balsa wing tip...
After studying things a bit, I realized it was possible to simply extend the 5/32" jig rods beyond the outer limit of the jig for the outside ribs. This seemed to work out OK. The second picture shows more clearly how the oustide ribs extend beyond the jig. With this setup, I sacrificed being able to completely invert the wing on the jig, but it worked out fine.
To do this, however, I had to figure out a way to support the center rib without the rods, so I glued on a jig that fit neatly into the adjusto jig's center slot. Looking back on this, I think it would have been smarter to get longer rods because at one point in the build, I realized that the center rib was slightly misalligned, which reguired some sawing a regluing, regrettably.
Dave's plan calls for building each half of the wing at a time on the plan using a piece of balsa to raise the trailing edges to the right washout height.
It tooka while to settle on where to drill the jig rod holes to allign things according to plan, and it also took awhile to figure out what dihidral to set up on the jig (forced me to recal some junior high geometry) since the hight at rib 11 on the plan is <u>the height above the plan plane to the bottom of the rib</u>. On the Adjustojig, I needed to figure the equivelent heights based on the "jig dowel points" which are not at the bottom of the rib... this confused me for a while... it took a couple extra days of thinking time to figure it out.
Picture 4 shows the ply/basla dihidral brace with the pencil marks I drew to maintain sanity...
Question: did you guys stick to the Platt dihedral as shown ( 4-5/8" for 34-7/8" at W11) = 7.6 degrees- it looks high.
Ziroli Zero plans show 4.5" at 37" = 6.9 degrees
Hal Parenti Top FLite 60 Zero shows 6-5/8" for 61"ws or 3-5/16" for 30.5"
I found a Mitsubshi Zero spec on the web that said 6.5 degrees of dihedral.
I also posted this question an anoterh RCU Zero thread at http://www.rcuniverse.com/forum/rc-w...l#post12373370
Comments?
thanks - ken
10-08-2017 | 11:06 AM
#85
My Feedback: (60)
.
Question: did you guys stick to the Platt dihedral as shown ( 4-5/8" for 34-7/8" at W11) = 7.6 degrees- it looks high.
Ziroli Zero plans show 4.5" at 37" = 6.9 degrees
Hal Parenti Top FLite 60 Zero shows 6-5/8" for 61"ws or 3-5/16" for 30.5"
I found a Mitsubshi Zero spec on the web that said 6.5 degrees of dihedral.
I also posted this question an anoterh RCU Zero thread at http://www.rcuniverse.com/forum/rc-w...l#post12373370
Comments?
thanks - ken
Question: did you guys stick to the Platt dihedral as shown ( 4-5/8" for 34-7/8" at W11) = 7.6 degrees- it looks high.
Ziroli Zero plans show 4.5" at 37" = 6.9 degrees
Hal Parenti Top FLite 60 Zero shows 6-5/8" for 61"ws or 3-5/16" for 30.5"
I found a Mitsubshi Zero spec on the web that said 6.5 degrees of dihedral.
I also posted this question an anoterh RCU Zero thread at http://www.rcuniverse.com/forum/rc-w...l#post12373370
Comments?
thanks - ken
12-01-2019 | 09:04 AM
#87
Dave Platt Zero Finishing Booklet
Came across your thread and what a beautiful build. I Am getting ready to build the same model and I'm looking for a copy of the finishing manual. Any Idea on where I can score one?
12-02-2019 | 12:35 AM
#88
My Feedback: (1)
I do have the general finishing booklet somewhere at home. If it is that (a simply typing machine written, without drawings nor images if I remember correctly!) what you are looking for, please confirm and send me your mail address via PM and I will scan and send it to you.
It is must be clear It will take me a few days, as I have to find the book at my library and scan the 20-30 pages.
Best Regards.
Last edited by jescardin; 12-02-2019 at 12:37 AM.
01-24-2020 | 08:21 AM
#89
Junior Member
Joined: Jan 2020
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
Dave Platt Zero
I have a set of drawings for the Dave Platt Zero but no instructions. Is there someone that I could purchase a copy of the instructions it would be very helpful.
The thread on this build was a big help in itself.
The thread on this build was a big help in itself.
01-24-2020 | 08:26 AM
#90
My Feedback: (10)
cheers - ken
The following users liked this post:
Fireflite82 (01-24-2020)
12-01-2020 | 02:44 PM
#96
Thread Starter
My Feedback: (6)
Hi folks,
It's been too long. I changed careers and have moved three times since the last posting. My Zero is in two giant crates I built to ship them (my wife calls them coffins) and which are now in a storage unit in Bayonne, NJ... whispering to me in my dreams... "Fly me...".
I have since been practicing on some less expensive birds and my simulator (RF8), preparing for someday when I have space to break open those coffins and fly her. I know I took some pictures of the crates for insurance purposes and will post pictures as soon as I can find them.
It's been too long. I changed careers and have moved three times since the last posting. My Zero is in two giant crates I built to ship them (my wife calls them coffins) and which are now in a storage unit in Bayonne, NJ... whispering to me in my dreams... "Fly me...".
I have since been practicing on some less expensive birds and my simulator (RF8), preparing for someday when I have space to break open those coffins and fly her. I know I took some pictures of the crates for insurance purposes and will post pictures as soon as I can find them.
The following users liked this post:
capt1597 (04-17-2022)
