RE: KMP Buyer Beware
Tunes, Buyer Beware, indeed! Obviously you haven't read that KMP has been blacklisted years ago.
Posted on: 7/6/2009 8:17 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=8911682

A new ARF prototype?
It looks like a 60 to 90 size bipe with a semi-copycat covering. Note the exposed aileron servos, the underside contour and the slave rods. Otherwise it looks like a current GP product. Has anyone heard of a new release coming from someone?
Posted on: 6/23/2009 10:10 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=8875643

RE: Magnum 91 XLS idle problems - help please
Here's a permanent fix....I use Thunder Tiger carburetors on all six of my Magnum engines, XL and XLS. They all run perfectly and o-ring kits are readily available. Incidently, the .91 XLS is no more! At least the current version of it. The new model, I was told, will be available later this summer.
Posted on: 5/27/2009 10:30 PM by Author "doctorgo" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=8804531

RE: Great Planes 1/4 scale Gene Soucy Extra 300S Review Now posted
FYI The landing gear for the Patty Wagstaff Extra will fit. I used it. Tower Hobbies stock #LXBNB4 $15.99 plus $4.99 shipping.
Posted on: 5/27/2009 10:14 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=8804484

RE: Is there a better Bipe than the GP Super Skybolt?

Posted on: 4/18/2009 9:39 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=8694021

RE: *CMP Giles 202 65"*
Engine down thrust: The built-in down-thrust angle was measured at four degrees. That's three degrees too much. I added hardwood shims under the engine mount. Dihedral: There's no dihedral at the horizontal stabilizer. The aluminum wing tube was replaced with an angled dowel to achieve a total dihedral of 4.25 degrees. This eliminated the roll coupling. With a re-designed stab, there is no pitch coupling. The stab and elevator are now 25% of the wing area with elevator counterbalance eliminated. This reduces the tendency to snap-roll during a tight loop. The fin and rudder are made to scale. Wing tips were added to the main wing to reduce the tendency to tip stall. However, it will still tip stall when landing in a cross-wind. Wingspan: 69" LOA: 64.81" Weight" 9 lbs- 3 oz. Engine: Magnum 1.08 XL Muffler: Bisson Pitts type Glow Plug: K & B 1L Prop: 15 x 8 APC Fuel: Wildcat 5% Engine is new, running at 8700 rpm. I expect 9000 when fully broken-in.
Posted on: 11/10/2008 8:46 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=8134623

RE: *CMP Giles 202 65"*
It needs tail re-design, four degrees dihedral to maintain knife-edge, reduction of engine down-thrust to one degree, addition of vertical grain shear webs, belly pan kept as a separate piece, etc., etc. and it will be a great flying plane.
Posted on: 11/7/2008 10:54 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=8125626

RE: Magnum XL-108A
FYI to all. There are actually three known versions of the Magnum 1.08 XL two-stroke cycle engines. Series One has the carburetor fastener ahead of the carburetor. It's really old! I've seen only one recently. The others hve the carb fastener aft of the carburetor. The most prevalent are Series Two and Three. They are both actually 1.13 cubic inch displacement and vary in this manner: Series Two has the muffler mounting hole span at 1.34 inches; Series Three muffler hole span is 1.66 inches, (latest version) and this is what Tower Hobbies has in stock, listed as an Asp muffler made by Bisson. The other variations are head diameter and machined versus die-cast head fins. The Magnum "1.08" is indeed an ABC (versus ringed) engine, and unlike the majority of engines on the market today it is considered a long-stroke engine (relatively speaking) because the piston stroke is longer than its diameter, as opposed to the "over-bore" design of most others. Mounting is the same as its sister engine, the .91 XL. The best prop, in my experience, for the 1.08 is the APC 15 x 8. The 16 x 6 just doesn"t have enough "dig" on the upline. Regards, DrGO
Posted on: 10/13/2008 9:26 PM by Author "doctorgo" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=8046512

NOTICE! Sunday, Oct 5th is the correct Swap Meet date
Sunday, October 5th is the correct date of the Sumpter Hilltoppers Swap Meet, located on Sumpter Road, at the Senior Center, 5 miles south of beautiful downtown Belleville Michigan. The date published in Model Aviation magazine is not correct. Regards, DrGO
Posted on: 9/22/2008 7:43 PM by Author "doctorgo" in the forum "Events, Shows and Fun Fly's - Airplanes"
http://www.rcuniverse.com/forum/fb.asp?m=7980674

RE: Goldberg 67" Yak 54 ARF
I have some replacement parts for the Goldberg 67" Yak. I can be reached at: doctorgo at yahoo dot com.
Posted on: 9/21/2008 8:50 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=7973187

RE: Why does my Kangke monocoupe 90a 1/5size fly like *rap?
My Monocoupe is set this way: No dual rates, no flaps, no expo. aileron up = 9/16" aileron down = 3/8" elevator up & down = 7/8" rudder right & left = 1 3/4" Balanced at 2 7/8" aft of wing's leading edge Powered by a Magnum 1.08XL (maidened with a .91) with a Bisson pitts muffler, Sonictronics 310 plug using Wildcat 5% fuel, swinging a APC 15 x 8 prop. 1.6 pounds of lead is attached to the Sub-firewall to achieve balance. Heavier wheels are used. Dry weight is 11 pounds, 14 ounces, giving it a wing loading of 30 ounces per square foot...a lot for this size model! Still it flies as if it is nose-heavy and lands as if it's tail-heavy. It's a strange performing plane. ( This is number 61 for me.) The airfoil appears to be similar to, if not actually, a Clark-Y; the same as is used on the J3 Cub. Don't let it slow too much upon turning or landing. It will stall abruptly!
Posted on: 5/25/2008 10:49 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=7540177

RE: SILICONE EXHAUST TUBING
In my search for an exhaust tubing, I also looked at surgical tubing and found that not only was it expensive, but also not suited for the tempuratures involved.
Posted on: 3/14/2008 10:33 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=7226655

RE: SILICONE EXHAUST TUBING
Greetings, A1. I too use silicone tubing for all my exhaust extensions in the size you mentioned as well as other sizes. If you don't want to pay $8 to $12 a foot, stay away from the car and truck supply houses as well as hobby shops. I buy mine in multiple foot lenghts at a commercial plastics and rubber supply house for $1.50 a foot! Regards, DrGO
Posted on: 3/12/2008 12:02 AM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=7212444

RE: Top Gun 60-90 size Ultimate
The Top Gun Ultimate 90 is not available in the US, according to my sources. However, this model, I was told, is a Dave Patrick design, as is the Goldberg Ultimate, so there may be some licensing arrangements which could allow the sale in the US, but not before July, 2008. But don't hold your breath. I, too, am interested in this model only because of the color scheme. It would save tearing off the blue covering on the Goldberg.
Posted on: 11/21/2007 11:05 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=6656992

RE: Great Planes RV-4 .60-.90 ARF
RV-4 Owners. Would someone who owns a GP RV-4 ARF be kind enough to e-mail me the dimensions of the horizontal stabilizer, the elevator halves, the vertical stabilizer and the rudder? (All tail feathers)
Posted on: 9/2/2007 9:40 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=6319635

RE: Great Planes 1/4 scale Gene Soucy Extra 300S
delivers only 77.8 % thrust to weight ratio. The rpm would need to increase dramatically. Doctorgo
Posted on: 7/24/2007 8:04 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=6151903

RE: Cermark Pitts Build/Assembly
Greetings, Randy. I have always had wing incidence issues with biplanes. The GP 1/3 Pitts lower wing was way out of line and it was (I sold it) easily the worst flying plane of the 60 I built so far. My GP Super Stearmans, on the other hand, are absolutely great! But again, the wing incidence was set wrong by design. I corrected it and the three I've done for myself and others, fly perfectly. The wing loading is 21.6 oz / sq ft, based upon its weight of 13 pounds, 12 ounces. With a Thunder Tiger 1.20 turning an APC 16 x 8 at 9200 rpm on 5% Wildcat fuel, it flies much too fast for scale. Obviously, a little less throttle remedies that situation. In regard to the Cermark Pitts. I know the red model is an old Dave Patrick design. It was not well built at first and Dave's association with Cermark became strained years ago. The blue model looks a bit different than the red. My question is: are the wing incidence specifications stated in the assembly manual? Does anyone know what they should be? The published specs indicate the model weighs 9-10 pounds. At 10 pounds the wing loading is 22.6 oz / sq ft. Do you consider 22.6 oz to be high?
Posted on: 6/23/2007 10:08 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=6025723

RE: Easy Sport Arf Mods
If you have no apprehensions to changing the covering or do some balsa work, here is a re-do you may find interesting.
Posted on: 6/7/2007 9:38 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=5958932

RE: Big Stik w/dihedral or without?
The GP Big Stik 60, AKA 44 Special 7.5 pounds , 64"ws x 60" oal Sig wheel pants, dubro 3" wheels Scratch LG strut, simple scratch cowl of balsa Dubro tailwheel brkt Tail feathers from "retired" Dragon Lady GMS .76, 13 x 7 APC, Bisson Muff, Sonictronics 310 plug, 5% Wildcat Rear servos, all HItec Monokote This plane is MADE for the GMS .76! Anhedral is a must for decent flat turns and knife edge without al lot of cross-control. Big Stik dihedral is 4 degrees total. Simply tuning the wing over will require the "hook" at the root ribs to be reversed and the servo mounts moved to the top of the wing.
Posted on: 6/2/2007 12:38 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=5932403

Reducing BIG Photos
I just posted two photos on the ARF and RTF Forum. They're REALLY BIG!! One is 1932 x 1445 pixels (650 Kb), the other is 2059 x 1538 pixels (707 Kb). How can they be reduced at the RCU thread?
Posted on: 6/2/2007 12:46 AM by Author "doctorgo" in the forum "Digital Camera & Photo Editing"
http://www.rcuniverse.com/forum/fb.asp?m=5933047

RE: WM Rambler 45
Ramblin' Patti
Posted on: 5/7/2007 10:38 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=5825202

RE: Kyosho Super Stearman
On the Kyosho Super Stearman you may want to consider these changes I made to improve handling: I canted the main wheels forward by adding a wedge shaped piece of wood in the landing gear mounting slot and used four 1/4-20 x 3/4 nylon screws to attach the landing gear strut to the fuse. This reduces the "nosing over" and prevents tearing out the bottom of the fuse. The screws simply break and are easily replaced. Dubro 3" Super Lite Wheels were used for better handling in the grass. The wheel pants are Sig, no longer available, but almost any of similar size can be used. When mounting the engine cowl, crown the cowl mounting blocks so the cowl doesn"t flatten out and crack when the mounting screws are tightened. I used larger screws and flat washers. My wife became upset when I recently sold my Stearman after seven years of service. I, too will be looking for a replacement.
Posted on: 3/22/2007 10:00 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=5602941

RE: p-51 cowling
Airborne models, the distributor of World Models, is also a source for .60 size P51 parts. Parts are listed on their website. Get your favorite hobby dealer to order parts at a lower price than listed.
Posted on: 10/2/2006 4:48 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=4819274

RE: Finished my Dave Patrick Ultimate!!
At which airfield will you be flying your new Ultimate?
Posted on: 10/1/2006 10:21 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=4816419

RE: Model Tech Dragon Lady/ G26
In regard to the wing: File the slot into which the "tang" at the wing's leading edge fits, deeper, a little at a time, until the the contour of the top of the wing matches the saddle in the fuselage. There will be no incidence problem. Also lengthen the slots in the wing where the aileron rods protrude...there's not enough clearance for full aileron movement. I located both tail servos in the aft location that's provided and the engine at 5 9/16 inches from the firewall. (Forget the spacer.) No extra balancing weight was needed with a .91 2 stroke-cycle engine. Don't beleive the weight stated on the box; the completed model will weigh near nine pounds.
Posted on: 9/25/2006 9:09 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=4792611

RE: Modeltech Dragonlady questions
Greetings, Lee. Could you be more specific about the trim and cowl concerns? If you e-mail me, I can spend more time on an answer. DRGO
Posted on: 9/25/2006 8:47 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=4792509

RE: GP Super Stearman
The easiest way to balance the GP Super Stearman at home is to clamp two pieces of wood, about 16 inches apart, to over-hang a table about a foot. Tape a long dowel (old push-rod) to the underside of the top wing, located per the instruction manual. This is your fulcrum, i.e. CG. Now place the model's fuselage between the over-hung sticks with the dowel resting on the sticks. Set the stab to zero by adding frontal weight, using a level on the stab. Done! (Update: The cabane interferes with one long dowel...use two dowels.) Wing incidence. Forget what you heard, forget what the so-called "expert" wrote in the modeler's magazine lately, forget what you see on the Tower website. Her's the straight scoop, proven with three Stearmans: With the stab set at zero, the bottom wing should also be at zero degrees. The engine should be set at minus one degree. The top wing should be set at Minus two degrees. Result: 1. the model will not climb when advancing the the throttle to full. 2. inverted flight will require less down elevator. 3. there will be less tuck to the wheels when flying in knife edge. 4. bounced landings will be a thing of the past. Setting the upper wing requires two longer L-brackets at the rear wing struts. Do some trig to to find the new hole location in the bracket. Along with this, the cabane location will change at the fuselage, and the aft screws may miss the hardwood mounting block. I simply drilled new holes in the cabane. Good Luck!
Posted on: 9/8/2006 10:19 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=4692170

RE: Quality comparison between KMP and CMP/Nitro/Raiden....anyone?
You're using the word "quality" in the same sentence with KMP? Hahahahahahahahahahahahahahahahahahahahahahahahah!
Posted on: 8/31/2006 8:13 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=4695204

RE: GP Super Stearman
P.S. I also have an aileron connecting rod location that works properly.
Posted on: 8/31/2006 8:05 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=4695172

RE: Kyosho Super Stearman 40
Two suggestions when assembling the Kyosho Super Stearman: 1. To keep the cowl round when attached, set the mounting blocks so both the vertical span and the horizontal span across the blocks are alike. Then crown the outside of the blocks so the cowl is not flattened when the screws are attached. This will keep the fiberglas from cracking. 2. Add a wedge to the landing gear mounting slot so the strut is canted forward enough that the center of the wheels is in line with the leading edge of the top wing. This will reduce the constant nose-over when taxiing or landing. (New mounting holes will be needed.) Just sold mine after seven years of service. It was an exciting pleasure to fly. I hope the owner has just as much fun as I had.
Posted on: 8/31/2006 7:53 PM by Author "doctorgo" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=4695124