RE: Tail Slide
If they're jet enough for Ali Machinchi, then they're jet enough for me :-) My Boomer XL and the Jetcat therein handle slides with ease.
Posted on: 5/19/2013 2:24 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11516315

RE: Why do people keep calling it TURBIN as in trashbin instead of BINE?
Nonsense, my smartphone isn't any smarter than your smart phone, yet I used one for both posts. You're so critical of others (yes, I remember your ridiculous "pilot error" post after the fatal 747 crash, wherein you trashed two dead pilots from the comfort of your armchair) and yet you can't own your own mistakes. What is your next thread? Breaks vs brakes? [8|] Why not just chill for a while, enjoy the hobby, and leave alone those fellow hobbyists and others you're so sure are unworthy of basking in your greatness?
Posted on: 5/16/2013 8:58 AM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11513206

RE: Why do people keep calling it TURBIN as in trashbin instead of BINE?
[quote]ORIGINAL: DiscoWings [quote]ORIGINAL: Hustler58 Someone from Louisiana is asking about the way people speak or write? A state where they have to have subtitles when they interview someone on TV? Well OK! Don't get upset when this turns in to Conga Line of people trying to kick your nuts for asking the question ! This will be fun to follow! Sorry I'm giggling hard at this one![:D] [/quote] Really Mr. American Hoggers? Wait wait wait, [color=#FF0000]YOUR[/color] FROM TEXAS? And what does everyone speak in TEXAS? [size=5]IT AIN'T ENGLISH[:)][/size] Who needs those sub titles now? You have your Hispanic pals to thank for that. [/quote] New thread topic: Why would someone who's so quick to criticize others' spelling write "your" rather than you're"? (They taught us the difference between the two in my Texas public school)
Posted on: 5/16/2013 8:27 AM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11513170

RE: New boomer?
Patricia told me a couple of years ago that Alan was working on something "totally new" and unlike his other designs. Whether that translates to the marketplace is yet to be seen. I have my doubts, as there's been plenty of time for it to have arrived by now.
Posted on: 5/15/2013 11:12 AM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11512366

RE: Fuel line tie wire?
Thanks Mike, I will look that article up.
Posted on: 9/17/2012 5:13 AM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11230891

RE: Fuel line tie wire?
[quote]ORIGINAL: Paul_BB How about this kind of stuff ? Is that OK ? [/quote] I tried those and was sad that they didn't work for me. Coulda been wrong size or something though. Thing is, the size is critical and wire is sorta universal. Still, if I had a varied assortment of those clamps I'd probably try them again.
Posted on: 9/16/2012 10:50 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11230669

RE: Fuel line tie wire?
[quote]ORIGINAL: eddieC Safety-wire pliers ???  Really ?? And I thought small zip-ties were overkill. (They're just as good, if not better. Almost impossible to cut the fuel line if over-tightened. ) KISS [/quote] Yes, really ;-) I must be doing something wrong though. I have never, ever cut a line by tightening the wire. I have gone too tight and broken the [i]wire[/i] a couple of times, but the Tygon was fine afterwards. In my experience it's not about keeping the line from falling off, it's about taking a couple of wraps around the fuel line and tightening the safety wire to make a perfect seal. I haven't had a single air bubble in several years now except those recently caused by a bad filler plug seal where the line had hardened and the line is obviously not tied. Works for me and lots of other folks who don't think an extra pair of pliers and 1/10 of one cent worth of quality stainless wire is an extravagance. If others want to use bread twisties on their jets I'm all for it, but I will go with the best materials available on mine to ensure that my thumbs remain the greatest threat to my jets' longevity. ;-)
Posted on: 9/16/2012 9:27 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11230626

RE: Fuel line tie wire?
Tying off the lines is more than a good idea IMO, it's essential. On my first jet I didn't tie them on the theory that they were tight enough, but had several "air-sucking bubble flameouts" before I wised up. After I tied 'em off the problems went away and the engine operation was flawless. My two cents regarding our multi-thousand dollar toys. Don
Posted on: 9/16/2012 8:44 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11230539

RE: How to Correct Measured Thrust for Density Altitude?
[quote]ORIGINAL: turnnburn I guess im still missing something. What are you going to with this info ? Use it to buy one turbine over others ? I mean Im sure its interesting and there is certainly no harm in it Im just not ultimatly sure what the point is ? [/quote] . [quote]ORIGINAL: turnnburn I guess im still missing something. What are you going to with this info ? Use it to buy one turbine over others ? I mean Im sure its interesting and there is certainly no harm in it Im just not ultimatly sure what the point is ? [/quote] There are many reasons to test output. General curiosity, pre or post maintenance, comparisons between installations, between brands, between fuels...
Posted on: 9/16/2012 8:41 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11230616

RE: How to Correct Measured Thrust for Density Altitude?
[quote]ORIGINAL: turnnburn Seems to me the obvious question is why do care ? Its going to effect all manufacturers engines of similar size and thrust approximately the same amount and there is little if anything you can do about it except wait for a cooler day to go flying . [/quote] The obvious answer is that some of us, as stated in the OP [8|], want to be able to make comparisons between test runs which happen on different days and under different conditions.
Posted on: 9/16/2012 12:53 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11230161

RE: Hobbyking BD5 for Jetcat P20
[quote]ORIGINAL: drdoom I have both the Kit and the P20. The fuse is pretty large, I think it will fly. But it wont be overpowered. My fuse came with damage. It is a heavier layup than the CMP small stuff. I wonder if a P60 would be a better choice. Or the small wren would be perfect. First pic is with a P100-RX, the P-20 is on that small falcon. you have to look to see it. [/quote] Good luck getting service on that damaged part from HK... Keep in mind that the P-60 weighs a ton when the fuel required is factored in, as it has just about the worst fuel burn per pound of thrust in the industry. You may be much better off with the W-44.
Posted on: 9/14/2012 8:18 AM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11228323

RE: How to Correct Measured Thrust for Density Altitude?
Thanks for the estimate, Ron. Thanks also to Fuloughed ual. It's helpful but I'm still hopeful that We can nail down confirmation of a solid formulation. Please note, all, that the original question was focused, and I'd rather not see the thread derailed into various derivative discussions. I am specifically asking about testing engines on a stand and wanting to compare apples to apples. That means I need to compensate mathematically for density altitude. Thanks, Don.
Posted on: 9/13/2012 8:36 AM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11227249

RE: Mobil DTE light?
Search. Lots of other info in previous threads.
Posted on: 9/13/2012 5:55 AM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11227104

RE: How to Correct Measured Thrust for Density Altitude?
[quote]ORIGINAL: BaldEagel Ask John Wright or Colin Stause both on RCU John used to do the testing for RCJI and Colin is the current tester. Mike [/quote] Yup, agree. Any idea how to contact them? Rctech2k7: Got it (I think), thanks. To test my understanding: Given that the std lapse rate of atmospheric pressure is 1"/1000ft and std seal level pressure is 29.92"....... If I measure 30lb T @ 5000ft density altitude, then the corrected thrust for std conditions would be.....(taking off my shoes and socks so that I can count on my toes as well)..... (29.92/24.92) * 30 = 36lbs I wouldn't mind confirmation from some more folks with a background in this science (vs a background in guesses ;-) but the above formulation makes sense to me and doesn't give me too bad a headache.
Posted on: 9/13/2012 5:49 AM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11227092

RE: How to Correct Measured Thrust for Density Altitude?
Dr Honda: I hope you are wrong. Otherwise, how can the folks at RCJI publish comparisons? Surely the weather changes would invalidate their data... Tim: Thanks, but I'm NOT looking for definitions of air density, please re-read the OP ;-) I'm looking for quantitative correlations between density and thrust for a given engine.
Posted on: 9/11/2012 8:23 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11225700

RE: RCJi Turbine Test Special Mag 2012
[quote]ORIGINAL: raptor30se Will this be available on iPad to purchase? [/quote] Am wondering same thing!!
Posted on: 9/11/2012 7:05 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11225633

How to Correct Measured Thrust for Density Altitude?
Suppose I run my engine on a stand and get a number different from the mfr specs when it comes to max thrust... The same engine in the same installation might put out more than specified on a cold day or less on a hot day because of the air density, making it impossible to make apples to apples comparisons between different engines or even when comparing the same engine from one day to the next. [b]Can someone provide me with a formula to correct measured thrust for air density, so as to derive a thrust value which has been corrected to a "standard day"?[/b] Many thanks, Don Ray
Posted on: 9/11/2012 7:01 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11225631

RE: BOOMERANG XL II EMERGENCY A.D.
Good job. I'm pretty sure mine aren't going anywhere, but your work is much more thorough.
Posted on: 9/10/2012 8:51 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11224557

RE: BOOMERANG XL II EMERGENCY A.D.
[quote]ORIGINAL: BaldEagel Not trying to tell anyone how to suck eggs, but to make things easier rig the booms and tail when reattaching the blocks to ensure they line up correctly, just a thought. [:D] Mike [/quote] Very good advice. I did exactly that last night, screwing the stab to the booms before the Hysol set to make certain the blocks wound up in the right place.
Posted on: 9/10/2012 4:20 AM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11223490

RE: BOOMERANG XL II EMERGENCY A.D.
[quote]ORIGINAL: Xairflyer highhorse any chance of a bigger pic, just post the image to RCU rather than photobucket [/quote] Can't upload direct to RCU from an iPad. I CAN post a bigger pic thru photobucket, but it's friggin huge, bigger than the normal boundaries of the page.
Posted on: 9/10/2012 4:18 AM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11223488

RE: BOOMERANG XL II EMERGENCY A.D.
This is a view of one of the worst of my mounting blocks from the bottom, after covering was removed. Note the GAP on rt (outboard) side, where the balsa spacer is too small to connect the hardwood block to the adjacent rib. On the left (inboard) side of the hardwood block there simply wasn't much glue. Not much glue on one side and no contact/glue on the other = pending disaster. Two other blocks were loose, but nowhere near this bad. In all cases, there simply wasn't enough glue or spacer material to solidly affix the blocks. All 3 loose blocks have now been removed through the bottom side of the stab and hysoled back into place (with some extra wood inserted in the worst case pictured above), but in my case there is some more bad news. While the blocks were too loose to be considered safe for flight, they weren't exactly falling out. Getting them out took some work and there were secondary repairs to repair the repairs, if you know what I mean ;-) since the surrounding sheeting had to be touched up some. Hope this helps, Don[image][URL=http://s1241.photobucket.com/albums/gg504/pb987987/?action=view&current=fe113342.jpg][IMG]http://i1241.photobucket.com/albums/gg504/pb987987/th_fe113342.jpg[/IMG][/URL][/image]
Posted on: 9/9/2012 9:31 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11223337

RE: BOOMERANG XL II EMERGENCY A.D.
Can someone tell me how to upload a photo from an IPad? The normal procedure doesn't seem to work.
Posted on: 9/9/2012 6:17 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11223168

RE: BOOMERANG XL II EMERGENCY A.D.
[quote]ORIGINAL: CARS II This is what I found, out of 4 blocks this one was moving when pushed from under. Now to find a way how to reinforce the hard wood blocks from the inside, I suspect I will have to open the boottom right over the blocks to add plywood and since these jets are heavy on the front then I guest I will be very generous on the reinforcement. I'm thinking light ply to sandwich the blocks glued on both sides from rib to rib then some more about 1inch glued to the top skin and the ply glued to the blocks, finally recover the boottom skin with light ply instead of balsa. Any ideas? my thoughts are to spread the load. [/quote] Actually, the XL's are TAIL heavy and require nose weight to meet the conservative CG specs, but I doubt even the most sturdy beefing-up will make a diff. You are talking about a couple of ounces on a 30+ lb airplane. That said, the stock specs are waaaaay conservative and you can go well aft of that CG without adverse effects. There is no sense, IMO in "injecting Hysol", as the places glue was required in my repair are either too wide to gap with glue to too narrow to get Hysol into. See post below for my repair notes
Posted on: 9/9/2012 6:04 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11223158

BOOMERANG XL II EMERGENCY A.D.
[b]THANKYOU OP F9FFLYER[/b] Thanks to his thread, I just checked my own '07 XL which first flew just last year and has 41 flts on it. [b]3/4 of MY STAB MOUNTING BLOCKS ARE LOOSE. HIS THREAD SAVED MY AIRPLANE[/b] This is RCU at it's best. I started this separate thread with a more urgent header to make sure the word gets out, because his PLUS mine make it much more likely that there are others and that this is not an anomaly. To check the mounting blocks, I recommend simply applying moderate +/- pressure while looking very closely at the covering surrounding the stab mounting screws. If you see a 15mm (5/8 inch) square of covering moving....then you have issues. I would also consider this to be a required check before each flight. I will report back here after I fix my own blocks to share what I thought an appropriate fix was in my case. Thanks again to the OP of the other thread. Don Ray
Posted on: 9/9/2012 4:05 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11223070

RE: Boomerang XL ?
[b]THANKYOU OP F9FFLYER[/b] Thanks to your thread, I just checked my own '07 XL which first flew just last year and has 41 flts on it. [b]3/4 of MY STAB MOUNTING BLOCKS ARE LOOSE. YOUR THREAD SAVED MY AIRPLANE[/b] This is what RCU at it's best. I will start a separate thread with a more urgent header to make sure the word gets out. All of us in the XL community owe you beers, man! Don Ray
Posted on: 9/9/2012 3:55 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11223061

RE: Boomerang XL ?
Mine is an '07 kit, and even back then the spars were carbon. I won't say my kit was unsafe or that it took "hours and hours" of engineering to make it so, just that there were enough small problems that it took many hours to fix "Chinese-isms" and the quality control was sloppy.
Posted on: 9/9/2012 3:17 AM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11222508

RE: Boomerang XL ?
[quote]ORIGINAL: BaldEagel Yes they are the same breakup, just put them in the wrong order on the post, second pic should be first. Note the rear ali incidence pin seems to be coming out of the bottom on the first pic (second on the post) and then out of the top of the wing in the second shot (first on the post) well it looks like the covering has popped at the least, seems to indicate either a spar fault or the spar was not put in, if I remember correctly [b]when it was first posted the owner said the spar was bent [/b]when recovered indicating that it was in place during the flight, if you can call it that. LOL Mike [/quote] I have been very critical of the quality of my particular Boomer XLII kit, as the quality was just terrible and there were several issues to be worked thru, BUT: I've gotta call it like it is and defend the Mfr in the above case with the pics. The failure mode in the photos plus the fact that [b]CARBON SPARS DO NOT BEND[/b] indicates to me that the owner (IF he made the claim of a bent spar) didnt even install the spars. IF he said they bent, I suspect he doesn't know a spar from the hole in the ground made by whatever was left of his airplane. Although my kit had issues (including missing spars which Patricia replaced for me), it's proven to be very strong. I'm feelin for the original poster of this thread though, it's gotta really sting to have the stab come apart. Really sorry for his loss.
Posted on: 9/8/2012 8:42 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11222368

RE: Boomerang XL ?
Looks like u got a lemon, sorry to hear it. My own kit had several flaws but I'm happy to report that the stab is solid, even after lots of -/+ snaps.
Posted on: 9/6/2012 9:12 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11220313

RE: Which turbine?
[quote]ORIGINAL: basimpsn [quote]ORIGINAL: fast_bro I am looking for someone who has real trust numbers not factory specs i have seen the rhino run. The other two i haven't. I have seen many other turbines of those two of course but not them. All three are good motors i fell like i just know some motors put out more than posted while others put out less. I do agree amt makes great have an old 450 that is great but heave. [/quote] My Rhino was only giving me 30# on my home-made scale but my K-180 gives me 39# and the k-170 36#[;)] http://www.youtube.com/watch?v=3RAjRfwJVuw [/quote] That's not the usual experience. I'd get that sick Rhino to the vet! Their service is incredible.
Posted on: 8/31/2012 12:08 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11212770

RE: Which turbine?
Yo FastBro, it's yer buddy Don here...how are ya man? Can't wait to see you do your magic thing with a 3D Euro ! Engines: The back end of RCJI usually has tables with actual test data, and one of the most valuable things gleaned from that is that fuel BURN has a lot to do with the overall weight. Pound for pound and judging from historical data of the various manfr's, I doubt you'll find a better thrust/weight ratio than the new P180. An added plus is that your bud and mine, Ed, has a better relationship than most with the folks at JetCat. I sure any of the brands u mention would do, but them is my 2 cents. Hope to see you at a fly-in this fall, Don
Posted on: 8/31/2012 12:05 PM by Author "highhorse" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11212766