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RE: All you Gee Bee people reply! - 12/23/2006 6:49:11 AM   
GeeBeeMan21


 

Posts: 87
Joined: 5/21/2002
From: Phoenix, AZ, USA
Status: offline 		Hey Erik,

Its me! I used to have Adrian Pages first run of the Gee Bee Z. It was a great little flier, but didnt stay on its wheels to easily. I was lucky to keep it from flipping on take off and landings 50% of the time. I also sent you a detailed email. Hit me up anytime!!

Todd

(in reply to E Henry)
       Post #: 101

RE: All you Gee Bee people reply! - 12/23/2006 6:55:12 AM   
GeeBeeMan21


 

Posts: 87
Joined: 5/21/2002
From: Phoenix, AZ, USA
Status: offline 		Well the problem with flipping isnt the wheel pants. Its the high thrust lines, combined with drag, and being short coupled. When a Gee Bee is on a tail high roll out, its like balancing an egg on end. I agree with Gee Bee Jim, the bigger they are the better they do.


GeeBeeJim...where did you balance your NWHT Gee Bee Z? Mine takes a ton of rudder coupling to get it to turn decent. My R-2 groves alot better. My R2 flies alot better than my Z, but I also know it better. Between the both R2's I had, I have about 350 flights on them. I only have about 25 on the Z and a few of those it shouldnt have made it lol.

Thanks,
Todd

(in reply to E Henry)
       Post #: 102

RE: All you Gee Bee people reply! - 12/24/2006 4:17:19 AM   
starzak



Posts: 1739
Joined: 12/5/2001
From: Chacotoma, NM, USA
Status: online
quote:

ORIGINAL: GeeBeeMan21

GeeBeeJim...where did you balance your NWHT Gee Bee Z? Mine takes a ton of rudder coupling to get it to turn decent.
Thanks,
Todd


Hey Todd, my Z balances at 25% and grooves just fine, but it does take some coordination on the sticks to make a turn look good. Must just be the nature of the beast ? What brand kit of the Z and R2 do you have ? I alternately take mine to the 1/8th Air Force scale event there in Phoenix. Do you attend that event ?

> Jim


< Message edited by GeeBeeJim -- 12/24/2006 4:19:52 AM >

(in reply to GeeBeeMan21)
       Post #: 103

RE: All you Gee Bee people reply! - 12/24/2006 6:53:22 AM   
GeeBeeMan21


 

Posts: 87
Joined: 5/21/2002
From: Phoenix, AZ, USA
Status: offline 		Bot of my kits are NWHT(jack devine) planes. I just moved out here from Indiana in July. I get alot of flying done at the Amps (www.AMPSRC.org) club on the north end of phoenix. Mine is right around 25% and that is where I have my R2 as well. With the G45 mine took some tail weight to get it balanced. I heard some other guys tell me they seen you fly yours there. They said they have only seen 2 Gee Bee's take off and land successfuly and that has been "ours". They tell me, you put on a hell of a show with it. I knew you flew the same version so thats why I asked. I appriciate it!


Thanks Todd

(in reply to starzak)
       Post #: 104

RE: All you Gee Bee people reply! - 12/24/2006 11:54:29 PM   
Craig-RCU



Posts: 487
Joined: 1/10/2002
From: minneapolis, MN, USA
Status: offline 		Hey all,
I have a Great Planes Gee Bee R-2. Mine weighs 11.5 lbs with a Saito 1.80 installed for a 35oz wing loading. It must be the fiberglass fuse that makes it relativly heavier than the Page Gee Bee's. My GP GB 68" wing weighs 3.5 lbs ready to fly. The Fuse weighs 8.0lbs ready to go with the 2lb 1.80 installed. The GP GB's incidences seem to be set up for easy take off and landing. It has a lot of right and down thrust to mitigate P-factor at high angles of attack. If I remember correctly the wing is set at +4 degrees incidence and the h-stab is at -3. I think these extreme incidences harm its flying qualities. It doesn't track as nicely in the air as my H9 Corsair which has its wing and h-stab incidences less divergent to eachother.

I don't know what happened on my first landing attempt with the GB but, in the blink of an eye, it snap-rolled inverted on approach and went in upside down. Luckily it was fixable but I decided to add -4 degrees washout to the wings to prevent the abrupt snap roll problem. Yes, it is possible to add washout to a fully built and monokoted, D-tube, constucted wing without any disasembly or uncovering. I just twisted the wing as hard and carfully as I could and used a plenty hot iron moved slowly over the sheeted leading edges of the wing to let the heat penetrate the balsa. This had the added bonus of reducing the average incidence of the wing to + 2 degrees and helped it track better in the air. I've nosed over a few times too, but that fiberglass v-stab is very durable and havn't had to repair it yet. Here is a video of one of my better nose-overs.

http://www.rcuvideos.com/view_video.php?viewkey=ae29cedc37da04b6b067

< Message edited by Craig-RCU -- 12/24/2006 11:58:29 PM >

(in reply to GeeBeeMan21)
       Post #: 105

RE: All you Gee Bee people reply! - 12/25/2006 2:19:14 PM   
Craig-RCU



Posts: 487
Joined: 1/10/2002
From: minneapolis, MN, USA
Status: offline 		Also, I recently installed the robart gear for this plane. The spring force on these shocks seems a little light to me for an 11.5lb plane and I'm sure that they would bottom out on a hard enough landing and let the wheel pants contact terra firma causing a nose over. The stock wire gear's problem is not bottoming out on a hard landing but twisting and letting the wheel contact the pants causing a breaking action followed by a nose over. The real GB and Delmar Benjamin's replica both have the wheel pants fastened directly to the wheel fork with separate strut fairings. That setup allows the shock to bottom out without the wheel pants contacting the ground. It also allows the strut to twist without the wheel contacting the pants. Twisting struts are a problem in and of themselves but no need to compound the problem by having the wheels contacting the pants also. So, I'm going to scrap my stock GP GB pants and fabricate a new set that more closly resemble the full scale system. This should be a much more robust setup and remove some of the worry-factor of landing my GB.

(in reply to Craig-RCU)
       Post #: 106

RE: All you Gee Bee people reply! - 12/25/2006 3:06:01 PM   
Craig-RCU



Posts: 487
Joined: 1/10/2002
From: minneapolis, MN, USA
Status: offline 		I've also been toying with the Idea of buying a replacment wing set and making my GB into a biplane. Not scale by any means but I thought it might look cool. It would be an interesting experiment anyhow to see how it flys with half the wing-loading.

(in reply to Craig-RCU)
       Post #: 107

RE: All you Gee Bee people reply! - 12/25/2006 6:44:47 PM   
starzak



Posts: 1739
Joined: 12/5/2001
From: Chacotoma, NM, USA
Status: online
quote:

ORIGINAL: Craig-RCU
The real GB and Delmar Benjamin's replica both have the wheel pants fastened directly to the wheel fork with separate strut fairings. That setup allows the shock to bottom out without the wheel pants contacting the ground. It also allows the strut to twist without the wheel contacting the pants. Twisting struts are a problem in and of themselves but no need to compound the problem by having the wheels contacting the pants also.


Yes Craig, the wheels, and the wheel pants should move together. What most Gee Bee manufactures give you is ka ka, an accident waiting to happen. Attach the pants to the struts so that they move as a common unit with the wheels.

" I've also been toying with the Idea of buying a replacment wing set and making my GB into a biplane. Not scale by any means but I thought it might look cool. "

Cool ? You've got to be kidding.

> Jim

(in reply to Craig-RCU)
       Post #: 108

RE: All you Gee Bee people reply! - 12/25/2006 7:48:11 PM   
Craig-RCU



Posts: 487
Joined: 1/10/2002
From: minneapolis, MN, USA
Status: offline
quote:

ORIGINAL: GeeBeeJim


Cool ? You've got to be kidding.

> Jim


LOL Ok, maybe "cool" is too strong of a word. Would you accept "interesting," if you can see past my poor photoshopping here? Sit way back, squint and make a farty, 4-stroke engine sound as you look at the picture for best effect.

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< Message edited by Craig-RCU -- 12/25/2006 8:01:38 PM >

(in reply to starzak)
       Post #: 109

RE: All you Gee Bee people reply! - 12/27/2006 4:27:13 AM   
pitviper51


 

Posts: 49
Joined: 2/28/2005
From: Vine Grove, KY, USA
Status: offline 		that is certianly an interesting idea... the Z would look way better as a bipe tho..
mike

(in reply to Craig-RCU)
       Post #: 110

RE: All you Gee Bee people reply! - 1/6/2007 6:30:16 AM   
flyjay77


 

Posts: 132
Joined: 1/18/2006
From: McLeansboro, IL, USA
Status: offline 		wanting to build a 25% gee bee R2 , Delmar Bengermin said in his book that the plane lost its ruder at around 80 mph, so on landing he would have to use the right /left breaks to keep it going straight, also he states that he had to keep the tail up as long as he could and as slow as it would allow for the alierons would reverse due to the high angle of atack on the wing , how does a model handle on landing , and can you keep it going straight? and is there anythign that I sould look out for while flying the model ?

jason,

(in reply to flynut007)
       Post #: 111

RE: All you Gee Bee people reply! - 1/6/2007 5:11:38 PM   
Craig-RCU



Posts: 487
Joined: 1/10/2002
From: minneapolis, MN, USA
Status: offline 		Handling depends on the manufacturer/designer. As I understand, most of the designers of model aircraft design most of the poor handling qualities out by sacrificing some scale fidelity. The full-scale R-2's have a very thin airfoil and no washout which is the cause of many handling issues. My GP GB R-2 handles a lot like my Hangar 9 Corsair on landing. My GB has shorter than scale main landing gear which helps prevent nose-overs and lessen the amount of right rudder needed on take-off. I prefer landing on grass with my GB and taildragger warbird because you can keep a bit more throttle on during the roll-out to improve rudder effectiveness and prevent ground loops.

(in reply to flyjay77)
       Post #: 112

RE: All you Gee Bee people reply! - 1/13/2007 5:22:27 AM   
US185Damiani



Posts: 806
Joined: 3/29/2002
From: Danville, PA, USA
Status: offline 		Check my Gallery you'll see 2 of mine there!

_____________________________

A good landing is one you can walk away from, but, a great landing is when you can re-use the airplane.... immediately

(in reply to Craig-RCU)
       Post #: 113

RE: All you Gee Bee people reply! - 3/5/2007 5:01:00 PM   
pipescs


 

Posts: 102
Joined: 10/31/2002
From: Lester, AL, USA
Status: offline 		One more time

I am working on a Model D Gee Bee Electric

Motor is a 450 to 480 out runner

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(in reply to US185Damiani)
       Post #: 114

RE: All you Gee Bee people reply! - 3/5/2007 5:05:11 PM