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Ziroli A-D1 Skyraider

Old 10-28-2011, 12:58 PM
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mmaney
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Default Ziroli A-D1 Skyraider

I have just gotten this plane at a swapmeet It is just the airframe. I am looking for informationon C\G servos, motor, retracts, and any other information you guys would be willing to share.
Thank You
Mike Maney
Old 10-28-2011, 01:59 PM
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All Day Dan
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Default RE: Ziroli A-D1 Skyraider

Mike, use this website for the CG if no one knows any better. Put it at the 28 percent point. Dan.
http://www.geistware.com/rcmodeling/cg_calc.htm#mac
Old 10-28-2011, 04:04 PM
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Default RE: Ziroli A-D1 Skyraider


ORIGINAL: mmaney

I have just gotten this plane at a swapmeet It is just the airframe. I am looking for informationon C\G servos, motor, retracts, and any other information you guys would be willing to share.
Thank You
Mike Maney
Excellent flying aircraft. Although Nick designed it for the G-62, I'd put a Quadra 75, DA85, Taurus 72, or anything close for power. Robart retracts are the norm, but Sierra retracts from Darrell are the best. Dont go crazy with servos, any 50 in. oz. servo will be just fine. The plane plane should weigh around 32lbs. There are plenty of "Sandys" out there if your not quite sure on a paint scheme. Good-Luck with it.
Old 10-31-2011, 05:24 AM
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Default RE: Ziroli A-D1 Skyraider

Quadra 75M, Robart retracts, 80+ oz. servos on the flaps & elevators. No weight needed to balance with this set up.
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Old 10-31-2011, 05:42 AM
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ROGER RUSSELL
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Default RE: Ziroli A-D1 Skyraider

Another pic of leadgofer plane
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Old 01-29-2019, 08:19 AM
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DOC
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Still No CG answer !
Old 03-04-2019, 01:47 PM
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Originally Posted by DOC View Post
Still No CG answer !
Here are a few pics from the plan. It looks like 5 1/4 to 5 5/8 with gear down. Mines almost done and I'll be balancing soon. I found some other info...

"I balanced mine with the gear down and set the cg about 3/4 of the way back in the cg range. first flight was effortless and it was a perfect spot for the cg.i didnt have to change it at all.
his designs are well proven and i would do as he recomends" from a thread on another site.
Old 04-23-2019, 10:08 AM
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Default Skyraider

Wow look's nice have you balanced it yet and have you flown it
Old 04-24-2019, 11:30 AM
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Just finished cycling the batts. Just got to install and balance. The fields are still wet up here, but hope to get to the maiden soon. I will have video and pics
Old 05-31-2019, 04:54 AM
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Old 06-10-2019, 03:53 AM
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Second and third flights this weekend, very smooth flier!
Old 06-16-2019, 02:27 PM
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Looks and flies awesome. You must be very proud of your work. My next build will be one of these, but probably something closer to 1.6m wingspan, but it wont look anything near as good as yours.
Old 06-16-2019, 02:47 PM
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Old 06-16-2019, 02:48 PM
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Thanks Vortrog!
Old 06-16-2019, 08:19 PM
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David Jackson
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Is the diameter of the cowling big enough to fit a radial engine, something similar to the UMS 210 five-cylinder radial? I believe 210 radial has a diameter of 11 inches.
Old 06-17-2019, 03:16 AM
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When I get home from work I’ll measure the cowl for you. I've seen a few builds where they made the cowl diameter larger to accommodate a multi cylinder engine. I think they were on the RCSB site

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Old 03-18-2021, 05:29 AM
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Had a mishap a while ago with my 100" Ziroli Skyraider.
Came a little too hot on the landing, had a small (really small18" the most in height) bounce and upon contacting the runway once ore with the mains, one of them gave way breaking the lead edge and ungluing the two main ribs in which the retract assembly was mounted.
I always thought that the design of the landing gear mount on this model was not strong enough. Having a full spar in which the partial ribs are glued to without the pass through thru the rest of the rib to the trail edge, is not solid enough. Also a 1/8" plywood rib to mount the retracts on a 30 - 35# model is calling for perfect landings or frequent repairs.
I decided to do some beefing up of the A1's center wing lead edge and ribs in the area around the retracts. I made the two retract ribs out of 5/16" aviation plywood and double them with the original 1/8" rib. Also doubled with 1/8" plywood the balsa ribs on each side of the retract ribs. Did the same on the other retract which had no damage in the bounce.
Also installed two hardwood stringers tying the four ribs together for added strength.
Added triangle stock to tie ribs to main spar and lead edge pinned with 1/8" wood dowels. Not much can be done to strengthen the lead edge due to retract location.

After cleaning the damage, this are the areas that needed reconstruction. The right sisde was opened to beef up the area so what happened on the left area does not happen again.
Old 03-18-2021, 05:40 AM
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Repairs and beefing up what I consider a design which can be improved.

Both sides repaired. Also triangular stock was epoxied to main wing spar/rib joint pinned with hardwood dowels.

Left wing

Doubled 1/8" original retract mounting rib with 5/16" plywood and balsa rib with 1/8" plywood. This was done on both ribs on the other side of this same retract as well as on the right wing. Hard wood spars were also installed tying uo the 4 ribs since the lead edge is not a strong point due to retract penetration.

Doubled 1/8" original retract mounting rib with 5/16" plywood and balsa rib with 1/8" plywood. This was done on both ribs on the other side of this same retract as well as on the right wing. Hard wood spars were also installed tying uo the 4 ribs since the lead edge is not a strong point due to retract penetration.



To improve lead edge strenthgt, a 1/4" plywood brace was epoxied tying the lead edge to both ribs.

Done on both sides of the ribs and both wings.
Old 03-18-2021, 05:45 AM
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Planking and finishing the repair



Bottom side planked

Left side top planked

Right side planked. This side had received no damage in accident. It was opened to prevent future damages due to weak structure.


Old 03-18-2021, 05:49 AM
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Glassing the structure repaiered






Old 03-18-2021, 05:51 AM
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Priming and painting





Old 03-18-2021, 05:59 AM
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Static payload and releasable payload.


External Left wing payload

External Left wing payload

External Left wing payload

External right wing payload.

Releasable Napalm tank in left wing

Releasable Napalm tank in right wing

Old 03-18-2021, 06:08 AM
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I did that two seasons ago... A relatively "easy" repair, just a big pain in the butt. Nice job!
Old 03-18-2021, 06:10 AM
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Adding center pylon with releasable mechanism. It will carry an additional napalm tank or an external fuel tank. Have not finished yet. Pending installing release mechanism and painting.


Center pylon with Releasable external fuel tank

Center pylon with Releasable external 3rd napalm tank
Old 03-18-2021, 06:10 AM
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I got bored a few weeks ago, so i threw this together...



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