RE: Land yacht build.
Neat project! It should be a lot of fun. Add a couple of detachable floats and you have a rc boat as well.
Posted on: 5/16/2013 9:24 AM by Author "iron eagel" in the forum "Unusual R/C"
http://www.rcuniverse.com/forum/fb.asp?m=11513241

RE: Screamin Demon .65 build thread
The last pass seemed faster but I couldn't get any good lines, and I'm not sure I did it right either so don't get to worried about it.
Posted on: 9/18/2012 7:18 AM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11232287

RE: Screamin Demon .65 build thread
The pass at 1.58 of the video is 167.14 mph if I did it right.
Posted on: 9/18/2012 6:55 AM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11232259

RE: Jack Capen PA-18 wing
Wow, that's quite a difference in price, Glad you found some at a far more reasonable price.
Posted on: 9/13/2012 4:22 PM by Author "iron eagel" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=11227684

RE: Has RCM folded?
I wonder how much rights to a defunct magazine is worth?
Posted on: 9/12/2012 6:11 PM by Author "iron eagel" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=11226693

RE: Jack Capen PA-18 wing
You can order that size stock from Aircraft Spruce if you need to have it.
Posted on: 9/12/2012 4:11 PM by Author "iron eagel" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=11226581

RE: Jack Capen PA-18 wing
You may want to look at using the truss side construction like the Sig 1/4 scale cub. I have a 1/6 scale Bellanca Airbus/Cruiser with a 11' wingspan and it's built with the truss style construction and is powered by a Zenoa 38, the only Plywood used was for the firewall. The nose was reinforced using balsa ply made up of 3 layers of 3/23 balsa laminated together as far back as the lower wing only. Well there was other plywood used for gussets on the frame, but the entire construction of the plane was pretty much done with balsa. It came in at about 19 Lbs but it's a big plane to start with and the semi Bi-Plane type of configuration adds a lot of weight to the build.
Posted on: 9/12/2012 10:21 AM by Author "iron eagel" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=11226232

RE: Jack Capen PA-18 wing
Glad you like it, it sounded like a good choice for what you were doing. I use this for inspiration for building this way. This is a photo of a original Jenny rib at a friends house in Taunton at one of the oldest continually operational airfields in New England.
Posted on: 9/8/2012 8:59 AM by Author "iron eagel" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=11221763

RE: Jack Capen PA-18 wing
How about using "stressed skin" construction (skipping the Plywood and Basswood)using built up Balsa ribs and sheathing, use a bit of carbon fiber veil and lacquer to harden and smooth the balsa sheathing? With your years of building I bet you could get a real light wing that way, and it would probably be stronger than either the original or foam core version.
Posted on: 9/7/2012 6:57 PM by Author "iron eagel" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=11221300

RE: (Something Fast?) Delta Build Thread
The laser cut precision is nice, but for a skilled builder like yourself, it's really not all that big of a deal. Your version of it came out pretty nice...
Posted on: 9/7/2012 12:41 PM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11220928

RE: (Something Fast?) Delta Build Thread
Your welcome.
Posted on: 9/7/2012 12:32 PM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11220920

RE: (Something Fast?) Delta Build Thread
Here is the PDF
Posted on: 9/7/2012 7:47 AM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11220643

RE: OT - RCU log in difficulties anyone?
There seems to be several issues with how the forum is working of late: logging in, viewing links to threads they send, or posting.
Posted on: 9/4/2012 8:59 PM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11217831

RE: Scratch building 105
Nice job Sam. Now you get to do some more work on it.
Posted on: 9/2/2012 6:04 PM by Author "iron eagel" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=11215011

RE: OUTLAW from EXTREME FLIGHT
It would be some hi-ish amps and with any speed plane battery placement gets touchy. Do 2 3S packs and it'd be a lot easier to fit. If it was easy we'd all be going 200, right? The amps really don't worry me, it's the battery requirements and weight that goes along with it cause concern on my part. Even with 2 3S at 5k mah your only talking total power of 5 amp hours and I am guessing a pound and a quarter of weight and maybe 2 minutes flight time (all figures SWAG). No it's not easy and and a pretty darn steep learning curve just to try... I'd like to see my current project get close to that without coming apart Mikes new design has some real potential to hit that. Cruise in the second flight was about 90 on around 70 watts where the prop worked.
Posted on: 8/30/2012 9:06 PM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11212232

RE: OUTLAW from EXTREME FLIGHT
[quote]ORIGINAL: evan-RCU Too high a kV... think 6S 4000-5000mA and a 8X7 APC fuel prop... the 1515-2.5D will get you over 180 on 3000W. [/quote] Is that the one rated for up to 36 volts? Hmm, a seven pitch prop spinning around 33k interesting. [:D] That setup sounds like it would be in the neighborhood of 135 or so amps. You would have to get creative with battery placement. My current model would be a bit tight for that but there's always a chance for a MkII sometime in the future if funding for a project like that becomes available...
Posted on: 8/30/2012 8:19 PM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11212196

RE: OUTLAW from EXTREME FLIGHT
Both motors I am trying for speed applications are inrunners and high Kv to boot. So I guess you can add me to the inrunner crowd... I wish the budget would allow for a Neu motor, but right now that is only wishful thinking, I think a 1515-2700 would work nice in a SD although it would be half the weight of the airframe.
Posted on: 8/30/2012 3:08 PM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11211930

RE: OUTLAW from EXTREME FLIGHT
[quote]ORIGINAL: sodbuster 1 I might actually give a Neu a try if I could figure out which one it is I should use lol. On the Scorpion, I contacted Dan Malone (the guy in the video with the 180mph ARF) and he said he kept wiping out Scorpions as the shafts would whip too much and kept wiping out the guts of the motor. He eventually went to a Hyperion (built by Scorpion, but I think with better components). One of the reasons I like the Motrofly is because it's a little shorter (however a little wider) than other motors in the same power band which I would think would make for better shaft support. I don't know if the extra width will cause me any mounting issues though. Have yet to look at the firewall or get the exact outside dimension on the motor. [/quote] I would guess that your looking at 35 mm as the OD of the motor (1 3/8inches). Give your self about another 1/16 inch of clearance around the motor and you should be good for cooling It's my understanding the tighter the better for cooling as long as you can get airflow you need. Given this if the airfoil is at close 1 1/2 inches thick putting that motor in should be no big issue. I like to have the motor on hand when I build to test fit it during the process and planning. Basically at this point any high power electric setup is an experiment in process and you have to accept the fact that your going to encounter obstacles in the process. I thing you may be right about the shorter motor being worth a try even if the OD is over 35 mm.
Posted on: 8/30/2012 12:50 PM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11211755

RE: OUTLAW from EXTREME FLIGHT
My PQ Stingray which is based on Mike Connors PQ is the hybrid delta/flying wing I mentioned is the one am trying to get to work on a 2850kv motor. With a 5X5.5 prop the motor was spinning better than 27k but as I mentioned the prop never came out of stall. The first flight we saw some interesting burst of speed using a 6X5 apc speed prop (in the 150-170mph range) drawing something like 900 watts, the plane has a very low frontal area but we never really got to push it as there were some issues during the flight. One of these issues was the loss of the battery hatch the magnetic latches or hinges failed. The other was that the crappy prop adapter took out the motor shaft or the 1/8 shaft couldn't carry the disc load of a 6 inch prop. (I am not sure what happened but the shaft bent.) I am taking the lessons learned on the stingray and applying them to the Screaming Demon as I build it. This is how it looks so far... And one more showing the PQ Stingray after it's mods were made.
Posted on: 8/30/2012 12:28 PM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11211741

RE: OUTLAW from EXTREME FLIGHT
Sodbuster, On the first flight of my hybrid delta/flying wing I was using a 6X5 prop, I am not sure which causes the motor shaft to bend it's 1/8 diameter shaft, or a crappy prop adapter but have since been trying to get a 5 inch prop that will work (so far no bent shaft). So I understand the shaft issues, to be honest I think a lot has to do with the mounting on the larger motors. But with a 43 inch wingspan I may have to go back to a 6 inch prop, the second flight with a 5X5.5 the prop never came out of stall but wasn't loading the motor that much. Right now I have modified the cowl and cooling intake to see if the 5.25X6.25 apc might work for it. So far the best speed was the first flight and that was 140-160 with the 6X5 prop but I am hopeful that reducing the cowl area by 40% behind the prop should help.
Posted on: 8/30/2012 8:47 AM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11211541

RE: OUTLAW from EXTREME FLIGHT
[quote]ORIGINAL: evan-RCU I found the 16/15/2 on a slightly cut down 4.1x4.1 to be a great setup for a small S400 pylon plane but a delta is much less efficient and the small 4.1x4.1 was too small. So I tried the /3 and it got too hot. So I went to the Ammo and a larger prop. Took alot of experiments to find a good combo. [/quote] After my experience with the HET in my plane I have found that getting the right prop can be a real issue, I am still chasing it.
Posted on: 8/30/2012 8:37 AM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11211528

RE: OUTLAW from EXTREME FLIGHT
Thanks Evan Great information! On my hybrid delta/flying wing I am using a Het 28mm motor 2w-23, and the Screaming Demon is getting Ammo 26-56-3200 with a CC Ice 100 and a four cell. The Hybrid delta/flying wing I have only tried on a 3 cell so far but it is designed to handle a 4 cell. Sodbuster, the price on the motor is cheap enough that I would at least try it out. If I had a unlimited budget and were looking at getting a real serious electric motor I would be looking at the Neu motors or something similar. I noticed the the German speed cup planes are using them and Scorpion's for power.
Posted on: 8/30/2012 7:47 AM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11211483

RE: OUTLAW from EXTREME FLIGHT
[quote]ORIGINAL: evan-RCU By the specs you have it sounds good. Do you have a link? If you can fair it in like I did on this electric dust it'd be great. [/quote] Evan, That looks like it must have been a interesting setup, that's blended in quite nicely. If you don't mind a question what did you do for cooling? Sodbuster, if you do as Evan suggests it should be a real nice setup. If you look at their specifications as suggestions rather than hard fast limits as far power when selecting a propeller it should be pretty quick. Also I didn't see if those values they quoted was 1800 watts continuous or peak as far as power handling. My guess is the motor is rated for something in the 75 to 80 amp region and not sure if this is burst or continuous power. Just keep cooling in mind when you set it up, getting into the 2KW region, the power setup is going to generate a lot of heat. I'd go with a minimum of a 100 Amp ECS and would probably opt for a 125-150 before I was real comfortable . I am using a 100 Amp ESC with a motor rated at 58 Amp continuous and really should have opted for a 125-150 myself but didn't and I am pulling my hair out trying to prop it because of it.
Posted on: 8/29/2012 8:34 PM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11211085

RE: OUTLAW from EXTREME FLIGHT
It is a nice design but as you said, not at heart a speed plane, although I bet with the power you had on them they can move pretty quick. It was hard to see the fin behind the float, that's a real neat plane, I was wondering about rudders on the floats you came up with a nice solution. I missed the fairing on the Navy job. I guess I about the only one nuts enough to bury the linkage on a delta to get a bit more speed. That's what I am doing with the SD I am putting together right now (well that and a few other things[:D]) it's wing is a lot thinner than the Outlaw I think.
Posted on: 8/29/2012 7:03 PM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11210990

RE: OUTLAW from EXTREME FLIGHT
[quote]ORIGINAL: evan-RCU Can you spot the mods in my ''ARF''? How many can you spot in the Skeeter? [/quote] I'm not all that familiar with the outlaw but from what I can see some of the modifications appear to be: One of the first things I noticed on three of the planes it looks as if all of the control linkages are internal. On the twin besides the center section being widened it was lengthened, has added fin area, and I don't see any control linkages showing. As far as the Skeeter, besides what looks like a real flight background for a flying field (nice) and of course the linkages hidden, and the floats, it looks as if you flipped it upside down and put the fin on the bottom.
Posted on: 8/29/2012 5:54 PM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11210895

RE: Carbon fiber cloth supplier?
CSTsales I'd go with .02 oz/yd veil the epoxy to bond it will be most of your weight.
Posted on: 8/28/2012 7:40 PM by Author "iron eagel" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=11209775

RE: OUTLAW from EXTREME FLIGHT
[quote]ORIGINAL: Rudeboy Don't trust those prop calc programs. They work for 'regular' setups.... if you go overboard, the data is false. For high hp (watts) high rpm setups you can go 150% over the limits posed by these calculators... easily...just buy a quality motor... a good motor can be pushed at least twice as hard as advertised (burst, 10seconds or less)... [/quote] Not to hijack the thread but I have a question. It's good to hear that it is possible to push the motor as hard as you just mentioned, (given my background in electronics I though it was plausible) I am currently experimenting with just the type of setup you mentioned. Right now the real issue I am having is getting the plane clean enough so I can get the prop out of a stalled condition. I may very well have to go to a larger diameter prop but was experimenting with a smaller prop hoping to limit the load on the motor. Right now I am thinking of upping the power by 25% and see if that will give any results. Any suggestions?
Posted on: 8/28/2012 7:36 PM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11209769

RE: OUTLAW from EXTREME FLIGHT
Your right, after looking a bit closer at the airframe, I had to adjust my suggestion for power in the 1.5 to 2 KW range. Even at that power level you would have to go nuts lighting up the airframe as well as keeping it as clean as possible.
Posted on: 8/28/2012 7:24 PM by Author "iron eagel" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11209760

RE: Scratch building 105
You have two weeks, get to work.
Posted on: 8/28/2012 9:06 AM by Author "iron eagel" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=11209037

RE: P-40E Warhawk - Advice
If your interested in learning to glass a plane, and keep it lightweight, visit Paul's Air Field Models site lots of good information. http://www.airfieldmodels.com/information_source/how_to_articles_for_model_builders/finishing_techniques/apply_fiberglass_finish/index.htm
Posted on: 8/27/2012 10:32 AM by Author "iron eagel" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=11207767