|
RE: Top Flite '.60 size' P-51D Mustang ARF: Building & Modifications
Thanks MustangFever, mine would actually be EP, presumably something like a power 60 or 90 on 6S or 8S 5000. I'd be using air retracts, probably Springair 300s or such.
Posted on: 5/11/2011 8:52 PM by Author "TTRotary"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=10514987
RE: Top Flite '.60 size' P-51D Mustang ARF: Building & Modifications
Thanks MustangFever. I am wondering if anyone has weighed the bare airframe. These birds seem to be on the heavy side from what I can tell about the AUWs people are listing in here. In your guys' opinion, is there any possible way one could attain the quoted 8.75lb-9.5lb?
Posted on: 5/10/2011 9:29 PM by Author "TTRotary"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=10513141
RE: Top Flite '.60 size' P-51D Mustang ARF: Building & Modifications
Thanks CorsairJock. Price question: what do you think is a fair price for a "NIB" ARF? A guy wants to sell one for about $200.
Posted on: 5/10/2011 3:55 PM by Author "TTRotary"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=10512595
RE: Top Flite '.60 size' P-51D Mustang ARF: Building & Modifications
Good info, thanks. So, if I were to use a Eflite Power 90, let's say, then I would add 3.6 oz to the right wingtip. Question: for electric, what kind of down / right thrust is best?
Posted on: 5/10/2011 2:42 PM by Author "TTRotary"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=10512468
RE: GEE BEE R3 RACER??WOW!!!
I got my plane in and, boy, is she beautiful!!. Super nice construction, like a 3DHS plane. Some notes: Wing looks like a Eppler 197 semi-symmetrical. It has good thickness and washout is built in, so I would expect this model to handle decently as long as wing loading is not excessive. There is room for flaps, about 50% of wing surface area, so slotted flaps would give 1.4x CL, enough for slow landings even at the higher wing loadings. All-up airframe weight is 3.75lb including the landing gear. This is really very good. There is a lb of landing gear alone, pretty much in line with what spring-air 602 retracts for .50 sized models would come out to. I added the powerset I intend to use, servos, spinner, all linkages, servo extensions etc., and the whole thing came in at 6.25lb. This was using heavy DS821 digital servos. This does NOT include the guy wires and hardware or the glo stuff, which added 1lb on it's own. I will not use any of this. With a .60 EP /6S setup and a 4in alu spinner, I can see how this plane winds up at 8.5AUW. AGain with the 4S power set I'm using and precautions, I should be able to get 6.25lb "wet". We'll see. I know this is marketed as a >60-.90 or more plane, but I don't see how the airframe would last long at such power levels. This is really a .46 plane to me. The "30cc" (73in WS) version has far lower wing ,loading.
Posted on: 1/24/2011 1:52 PM by Author "TTRotary"
in the forum "Scale Racing"
http://www.rcuniverse.com/forum/fb.asp?m=10275580
RE: GEE BEE R3 RACER??WOW!!!
Yes if I can figure out how on here. I have provided pics on the other forum (RCG). You can find them in the thread I started under Sport Planes, entitled Gee Bee R3.
Posted on: 1/24/2011 1:43 PM by Author "TTRotary"
in the forum "Scale Racing"
http://www.rcuniverse.com/forum/fb.asp?m=10285270
RE: GEE BEE R3 RACER??WOW!!!
Thanks Capt. for your input here. BTW, that last plane Gerry sold would be mine ;). I expect to get her next Monday. I had read your initial report and those of others with great interest and a fair bit of apprehension. I am not that experienced a flyer, but it stuck me that the guys having real issues are not using enough expo. I have the Cermark Fantasy Racer, which is basically a 51" foam replica of this plane, and it was a real handful until I got the right amount of expo dialed in, which came out to 60% for me. It was also CG sensitive, and lots of guys crashed them on the maiden. It now flies like it is on rails, with no real bad habits. I can also see where an 8.5lb plane (32oz wing loading for this bird) in a 2G turn would stall out at 50mph, which is probably what happened to that one guy whose plane basically augered in mid-bank (he may have also dumb-thumbed the rudder in his haste to line up for the runway). One question I have Capt. is: does this plane require rudder mixing to turn properly? Jason Cole made some statement about the wheel pants acting as SFGs such that rudder was required. I note no such behavior on my Fantasy Racer...just nice smooth aileron turns (once the correct amount of differential is dialed in). Also: would you say there is a good bit of P-factor here? Or was that perhaps a case of incorrect motor thrust. There seemed to be some question as to whether it was consistently set on the early models (and something I will most certainly verify). I have not dealt with p-factor yet but I will shortly complete my first warbird (P-51) and fully expect it. Gerry says his version is futher improved over V2, we'll see. He did get back to me today with an airframe weight: a whopping 4lb 13oz which is anything but light in this size. Having studied pics of the fuse, I see it is really built light - in the same manner as my 3DHS planes, so I expect it to be somewhat delicate. I think the issue on the kit is the weight of the hardware. Gerry measured 9oz worth of guy wire+associated hardware. The wheel / fairing / steel wire is about another lb - pretty consistent with retracts. I have weighed out some different power sets, consisiting of motor / esc / batt / servos. A Power32-46 equivalent powerset is the lightest, at a smidge over 2lb all up. This is a Tgy 42-50 600 with a 4S 5000 20C batt. Next up is the 42-60 600 with heavier DS821 digital servos. I have a Power60 and 6S power that could go in but I'd really like to avoid that if at all possible. I'll be making every effort to stay below 7lb. I may add flaps. Any further thoughts / comments / advice you have would be greatly appreciated. -Marc
Posted on: 1/12/2011 5:17 PM by Author "TTRotary"
in the forum "Scale Racing"
http://www.rcuniverse.com/forum/fb.asp?m=10259023
RE: GEE BEE R3 RACER??WOW!!!
Vince, I'm replying in here because the PM isn't working fro some reason. I'm SoCal too - Claremont, so exchange would be easy of that's what we want. This is the exact same plane as the donut models one. The french guys were only distributors of the model. I got an email back from Horizon Hobby Germany that they had purchased the distribution rights to the plane from Donuts - not clear if it was for Europe or everything. The Giant Models guy (Gerry) claims they have a direct distribution contract with the Chinese factory, who are the guys producing these. Giant sells the 59" for $300 plus shipping.Not sure why the scheme keeps changing around, but Texaco is the one out there right now. RE weight - I looked more closely at the pics in the thread and realize to my surprise that the model is not skinned. The finish surface was so i good i thought it was! It looks to be built very light, built like my 3DHS planes...I'm wondering how light I can get it so the wing loading stays reasonable. I am really surprised at some of the AUWs reporting in here, especially the 8.5lb one. I also think the power needs to stay on the low side because I don't see the airframe handling big power. I am actually thinking of a Power 46 or equivalent on 4S, in an effort to keep the weight down. I threw a Turnigy 42-60, Zippy 4S 5000 batt, 4 servos, and a 60A ESC on the scale and got 2.25lb. If the airframe comes in at 3lb, I don't see a reason why one cannot build one to 6lb or less AUW. I am amazed some of these planes are not totally disintegrating with people stuffing 125s and other monster motors in there!
Posted on: 1/11/2011 11:29 AM by Author "TTRotary"
in the forum "Scale Racing"
http://www.rcuniverse.com/forum/fb.asp?m=10255576
RE: GEE BEE R3 RACER??WOW!!!
Spoke with Gerry at Giant Models (HUGE thanks Kerwin51 !!!!!) and they have not only the subject plane, AKA the "20cc" version, but also a 30cc 73" and a 100cc which must be that german one we see in the videos. All are made by the same Chinese company, and all are ongoing models. The 20cc (ours) is already in, but the others are coming February. The smallest one, ours, has the highest wing loading, which would explain the difficult flying characteristics, although having reviewed all the vids, some seem to fly this baby with no issues other than somewhat tricky landings due mostly to the no-spring gear. All the Giant models ones come in the Texaco scheme according to their website. Nex, I'm about to pull the trigger but let me know if you want to trade. I'd prefer your paint scheme. Also, Id love to know how much the airframe weighs. I keep hearing refernces to "light build" but then I see 8.5lb porkers. Can anyone weigh their airframe?
Posted on: 1/11/2011 12:29 AM by Author "TTRotary"
in the forum "Scale Racing"
http://www.rcuniverse.com/forum/fb.asp?m=10254632
RE: GEE BEE R3 RACER??WOW!!!
Got a response from Donuts-Models, the purveyor of this plane. According to them, Horizon Hobby DE (Germany) is now the exclusive reseller. According to Donuts, the plane is still in production and they do a run of 400. No details on where that stands.
Posted on: 1/4/2011 1:01 PM by Author "TTRotary"
in the forum "Scale Racing"
http://www.rcuniverse.com/forum/fb.asp?m=10239277
RE: GEE BEE R3 RACER??WOW!!!
[quote]ORIGINAL: nexusdc5 Hello all, Im very new to this forum regarding the Gee Bee R3 59 inch span. I stumbled upon a guy selling one of these beauties on RCU. I did some research on this plane and it was beautiful. So I bought it, the guy is out of Canada and he says he can get more if anyone is interested. I should be getting mine this week. The Quality of this aircraft is amazing. Just wanted to share the good news. Need to find time to start building it along with the 32% CARF Gee Bee Im presently building. Im putting a Moki 250 in it. Absolutely breath taking combination in Sound and Flight. Sounds like the real thing. Anyways.... Cheers and good luck. Let me know if anyone is interested in information regarding possibly getting one of these beauties and ill put you in touch with the gentle man I bought mine from. :) [/quote] Aww man, I don't care if she flies like a buckin bronco. I'd kill for one of these gorgeous planes. Please let us know what your Canadian friend can do. I emailed the French hobby company that carried them, waiting for a response... Meanwhile, I've got my Cermark Fantasy Racer, but it's not the same. Very nice flyer though.
Posted on: 1/3/2011 11:39 PM by Author "TTRotary"
in the forum "Scale Racing"
http://www.rcuniverse.com/forum/fb.asp?m=10238089
|
