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Oct 04, 2018, 04:15 AM
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Discussion

Du-Bro Seabird


I had an original Du-Bro Seabird in 1975, with an Enya 60 III, Northfield Ross oil/ separating muffler. I used a 12x6 without issues. Never flew it off water . Didn’t last long....cg issues. I will be building another original Du-Bro kit shortly with slight mods( sharper hull edges, chines, lighter tail ), same Enya 60 III G8 . I’m familiar with all of the bad comments throughout the years about the Lanier version. For those of you that had the original Du -Bro version..how did it float ? I will do a building log on the original Du-Bro version for those of you interested.
Question: Did the Lanier version have the block of foam in the nose as original Du-Bro Seabird ?

Thx,


Brad
Last edited by bradl7112; Oct 04, 2018 at 04:42 AM.
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Oct 26, 2018, 05:51 PM
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Looking for a pdf of the instructions for the Lanier version of the Du-Bro Seabird to see what the differences are between the two kits.

Thx
Oct 26, 2018, 11:28 PM
Letís eschew obfuscation.
scott swanson's Avatar
I have a Lanier version of the Sea Bird. It does have foam in the nose.

I have flown it only once due to issues with my hand-me-down motor, but it did fly OK. I had read about takeoff issues others had, and before my flight I modified the hull shape. The vacuum formed hull was too round at the step, and the step would not have been the last part of the hull to leave the water, causing too much stiction to take off. I deepened the step to fix this, and also added chines to the hull bottom-to-side edge. With these mods mine had no issues taking off with the old Enya .60. Edit: Webra 10 cc.

Scott
Last edited by scott swanson; Oct 28, 2018 at 12:58 PM.
Oct 27, 2018, 09:17 PM
Letís eschew obfuscation.
scott swanson's Avatar
Here are some photos of my Sea Bird. The step is a foam wedge with a layer of ABS sheet added for protection. The chines are 3/8" balsa triangle stock, tapered toward the front, with saw kerfs so they would make the bend, painted to be waterproof, glued on, and then Monokote ironed on for looks. I don't remember but I probably used Gorilla glue to glue foam & balsa to the ABS hull.

Scott
Oct 27, 2018, 10:41 PM
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Thanks Scott. Those mods are similar to what I was planning to do. Love the Webra Blackhead. How much does your bird weigh ?
Oct 28, 2018, 12:57 PM
Letís eschew obfuscation.
scott swanson's Avatar
Brad,

It weighs 108 oz (6.75 lb).

I misremembered the engine; it's a Webra 10cc.

Scott
Oct 30, 2018, 10:54 PM
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Scott,
What size tank did you use ? Did you put a servo behind the tank or in the wing as suggested ?
I seem to recall using a 10 oz round tank back in 1973 with the servo underneath the wing per original Du-Bro plans.
Thx

Brad
Oct 31, 2018, 10:48 AM
Letís eschew obfuscation.
scott swanson's Avatar
Brad,

I don't recall the answer to your questions. I do think I should have used a smaller tank to allow more foam padding; I think fuel foaming may be part of my motor issues.

Scott
Nov 07, 2018, 10:21 PM
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Engine pylon/ fuel tank


Switched to recommended 8 oz Sullivan round tank .The 10 oz would not allow room for the throttle control T-bar, which worked quite well in 1973-1974. The brass rod behind the 8 oz tank is for the original Du-Bro T bar mechanism on the Du-Bro Seabird. Also, I
reinforced the ABS top cowling with CG nylon tape. I seem to recall this was a problem area in 1973-1974.
Last edited by bradl7112; Nov 15, 2018 at 11:44 PM.
Nov 08, 2018, 03:05 AM
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As a side note, Du-Bro packed their ARF’s with local newspapers. A time capsule into the past. Chicago Sun-Times , Mon, Apr.6, 1970....Round Steak .98c/ lb, Right Guard,79c, New Plymouth Duster $1970, 270 robots move into US industry, the public speaks on Vietnam. Mayor Daley and a very young , Adlai Stevenson, age 39 , Z Frank, world’s largest Chevrolet Dealer...Evans-Novak op.ed.A bill to have Nixon reduce our commitment to Vietnam. Maybe more kids should buy Du-Bro vintage Arfs’s to learn about American history....Nixon who ? Vietnam what ? Who are the Beatles ? Actually riding a bicycle, interacting with real people, not texting 24/7... LOL..
Last edited by bradl7112; Nov 08, 2018 at 11:16 AM.
Nov 21, 2018, 10:35 PM
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More Old School Du-Bro Seabird


Some more photos on the engine pod set up..
Last edited by bradl7112; Nov 22, 2018 at 08:56 PM.
Nov 29, 2018, 05:20 PM
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Du Bro Engine pod Spinner


Engine Pod and tenatative spinner...
Dec 14, 2018, 01:57 PM
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brownman863's Avatar
Thanks for all the info, I just picked one up for $10,in the process of doing the mods and putting it together.
Dec 28, 2018, 11:41 PM
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More work..on the original Du-Bro Seabird


Trial fit of wing and engine pylon.Engine pylon coated with resin to waterproof plywood structure. Dihedral is precut by Du-Bro..Should be 1’’ under each wing tip when put together. Using 8 oz tank as per plans, 10 oz would not allow T-bar throttle arm per plans..not enough room for servo behind tank with original set up.
Last edited by bradl7112; Dec 28, 2018 at 11:47 PM.
Jan 07, 2019, 07:50 PM
I just want to go fly!
walter3rd's Avatar
Love it! Must be the inspiration for mine...


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