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Gee Bee Y 50CC 97.4'' RC Airplane

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Gee Bee Y 50CC 97.4'' RC Airplane

Old 09-23-2018, 04:57 PM
  #51  
jstanton
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Will I worked on the Gee Bee today and here are a few pics I took. Things are coming along pretty well.

Rudder pull-pull






Pic#1 Rudder Pull-Pull
Pic#2 Elevator servo lead extensions
Pic#3 Elevator Servo and control horns
Pic#4 Robart style hinges for all control surfaces
Pic#5 Tape holding both wing haves together
Pic#6 Elevator and Rudder

Last edited by jstanton; 09-23-2018 at 05:07 PM. Reason: Explain pics
Old 09-24-2018, 07:12 PM
  #52  
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Here are a few more pics of how things are going.

Mounting template on firewall is for a DA 85. I thought this was a 50cc Plane


Landing Gear and wheel


Medal wing mounts with install blind nuts. Each wing is in 2 half's


Installed landing Gear
Old 09-29-2018, 05:19 AM
  #53  
Lifer
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Quick question: Does the wing have any dihedral? It looks flat on General Hobbies website.

Thanks in advance.
Old 09-29-2018, 06:23 PM
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jstanton
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Originally Posted by Lifer View Post
Quick question: Does the wing have any dihedral? It looks flat on General Hobbies website.

Thanks in advance.
I just finished putting both wings together and it does not seem to have any dihedral at all. The carbon fiber wing spar goes the fuselage and threw both halves of the wing and is very straight.
Old 09-30-2018, 12:08 AM
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Thanks for checking!
Old 10-06-2018, 07:16 PM
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JC 60 Twin


Fuel Tank and power board
I have the JC 60 Twin mounted and I got the fuel tank and power board installed. Here are a few pics.
Old 10-07-2018, 02:23 PM
  #57  
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Here is a pic of the JC 60 twin with the cowl on.

JC 60 Twin fits perfectly inside the cowl
Old 10-08-2018, 07:44 AM
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In your opinion, is the mounting bracket for the main landing gear seem sturdy?
Old 10-20-2018, 04:28 PM
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I just purchased one of these myself 2 days ago thinking the three cylinder radial saito 90cc gas would be plenty (turns a 24x10 prop) but now I see the firewall calling for a da85 ??? I wanted something with lots of wing because the saito weighs over 7 lbs but I am wondering how much tail weight I might need . . thanks for all the great pictures , kind of took a gamble ordering it as I could find little information about it . wish mine had the 4 piece wing , it's 2 piece . Would have been so nice to leave the wheels on the plane . . anyway keep up the great work . cheers Roger
Old 10-20-2018, 05:34 PM
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I saw the firewall was marked for a DA-85. I had a DLE-60 twin I wanted to use and it fit on the firewall just fine and it is a perfect fit for the big cowl. I have a VV 22x10 prop on it for break-in I just hope it is strong enough for this plane. The web site said this plane was a 50cc bird. I was very surprise to see the firewall marked for a DA-85. I am almost finished and will post more pics when I am done. Just have to balance the plane and test run the DLE-60
Old 10-20-2018, 05:37 PM
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Originally Posted by Lifer View Post
In your opinion, is the mounting bracket for the main landing gear seem sturdy?
from front to back it seems strong enough. Just not real sure about side to side yet. I will be testing it for ground handling before the maiden flight and any bad thing should show up there.
Old 10-20-2018, 06:02 PM
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I was thinking it might not be a bad Idea to make a side brace for the landing gear ,even if it had one brace from the side of the strut housing where the rear brace mounts to the root of the wing where it joins the plane .Like a 1/4" carbon rod . we have quite a short field and on a calm day we sometimes have to make a sharp turn at the end of the runway to prevent going into the pickies

Last edited by RAMMJETT; 10-21-2018 at 02:45 PM.
Old 10-28-2018, 04:58 PM
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I finished the Gee Bee this weekend. I had to add 10oz of weight to the Cowl to get the CG right at 6 5/8". The JC EVO 60 twin started right up and is giving me 6850RPM and a good 1600RPM idle.on a VV 22X10 prop. I have taxied the plane around the field for a bit and the ground handling is very good. I built a stand out of 3/4" PVC pipe to help me assemble the plane at the field. I hope to do the maiden next Saturday. I will try and get some video for your all.
Old 10-31-2018, 02:43 AM
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Ant report on the test flight?
Old 11-01-2018, 01:53 PM
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will be beefing up my landing gear ,watch the landing of the 97.4 inch. 3 min 10 sec

Last edited by RAMMJETT; 11-01-2018 at 02:02 PM.
Old 11-01-2018, 02:04 PM
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Kinda changes one's view of the design. Minimal side-load strength. Wire gear would be a better option.
Old 11-01-2018, 02:13 PM
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Didn't seem like the guy was at fault ,the landing looked pretty good , a bit fast but pretty clean .. What worried me was the strut mounting plate seems to be screwed to the end of the strut , my guess is the strut snapped of the mount .. Side brace going on mine for sure no question ..
Old 11-01-2018, 02:16 PM
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Originally Posted by Lifer View Post
Kinda changes one's view of the design. Minimal side-load strength. Wire gear would be a better option.

I don't know with wire gear if you could keep the wheel centered in the wheel pant
Old 11-01-2018, 09:57 PM
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Ouch! Definitely going to look at scale bracing, both inboard and outboard.
Old 11-03-2018, 07:12 AM
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Default Maxford RC version...

I too have recently obtained the Maxford version of the plane (the V2). Came well packaged, looks great, built straight and light. I will use the Saito FG90R3 radial, which fits well. The adjustable firebox needs reinforcement to take the weight of this engine. I have ditched all CA hinges supplied for Robart hinge points and improved on the linkage hardware (Kuza/Goldwing RC). Finally ditched the supplied 5.5" wheels for 5" Robart air wheels to take up the landing suspension action (Maxford has wire gear). Need to think how to modify the bracing to provide additional side load support for the gear..




Last edited by hpergm; 11-03-2018 at 09:02 AM.
Old 11-03-2018, 07:12 PM
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I have the same engine waiting to go into my Gee bee when it shows , looks great in there
Old 12-25-2018, 09:25 AM
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Just to share some of the mods to stabilise the LG laterally. Brazed some M3 nuts and used long eyebolts to mount the flying wires. Painted the wire legs to good effect. Looks like it will hold some skidding.

Last edited by hpergm; 12-25-2018 at 09:27 AM.
Old 12-25-2018, 09:27 AM
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A wider view.

Last edited by hpergm; 12-25-2018 at 09:32 AM.
Old 12-25-2018, 02:29 PM
  #74  
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At the wing attachment areas, what did you do to create a hard-point?
Old 12-25-2018, 04:10 PM
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The Maxford kit provides pass-through aluminum tubing preinstalled in the wings, the original intent being to thread the flying wires through. I passed an M4 threaded rod instead and secured it with nuts on both sides. This then acts as a hardpoint for the clevises on the wire runs... Pics to clarify.

Last edited by hpergm; 12-25-2018 at 04:15 PM.

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