Saturday's are always busy, and one with perfect weather, very. I was there for almost 4 hrs and got maybe 4-5 flights. I took the Pulse XT60 and the Ultrastick out. I just flew and didn't bother with pics or video.
As I was getting ready for the first flight of the Pulse XT60 I warmed up the engine and thought the cowl was really shaking (I think I saw the muffler jiggly too). Had a nice flight. As I was setting up for a second flight I realized I didn't have two US 4-40 screws (I think that's the size) and that's why the cowl was loose. I taped the loose side and taxied out to the runway. As I turned to take off I saw the muffler was really dancing so taxied back and saw it had come lose. I taxied back to the bench. A flying buddy, Larry, gave me two screws for the cowl (he has a small hardware store in the back of his car). I removed the cowl to fix the muffler and being rear mounted I would need to remove the engine. I really wasn't in the mood to do this at the field, I came to fly, so I set the Pulse aside for the day.
Flew 2-3 flights on the Ultrastick over the next 2-1/2 hrs (a lot of waiting my turn). I had it dialed in. At the end of my last flight I realized I was getting tired and my vision unreliable (cataracts, need good lighting and cloud clover was moving in). I wisely called it a day.
You can see the muffler hanging loose. One bolt still attached. Thought the other lost but it fell out of the cowl when I removed it. Pulled the engine, reinstalled the bolts with a friction lock washer and some thread lock. This one always shakes loose. This is an real RCGF 20cc (which Joe Nelson told me is actually a 26cc). The muffler has come loose on this engine a few times
One thing I later noticed as I worked on the firewall for the MX-Bach, is that the exhaust tube got bent back. It's straight back, no cracks. I forgot to look but I think this 35cc is a DLE. It doesn't need replacing, which is good as I can't afford one right now.
The firewall is coming along nicely. Had to Dremel and hack saw the notch flanges at the four sides. Tomorrow I will drill it for mounting the engine, the center hole for the fuel lines and a small hole for the throttle control rod. I had to cut the original one to get the engine free of the firewall, so I'll be making a new one. I noticed that the flange holes on the engine box to which the fire wall gets attached did not appear to have epoxy in them... I am not sure why, though I see this on landing gear hard points that are also installed using flanges so that it can break out clean. Is this what they had done with the firewall? I am not sure I will, I think I will epoxy all the way around. If this plane crashes again I don't expect it to survive, and I would just as soon the engine breaking free in flight not be the reason it crashes
I knew I had a large set of aluminum landing gear. They were not drilled so I was able to custom drill them. Here they are installed. They are curved, which I don't think I have ever had on a plane before. Terribly upset the carbon fiber ones were broken in the crash. These I'll work great!
Tomorrow I will install the firewall and the engine. Then I will need to repair the under cowl and the canopy. I got some metal L brackets I may use to repair the cowl mounting tabs, but that's an idea still in the works. This hasn't been too difficult a repair so far.
This morning I finished up the wiring on the Morane Saulnier Type N. It came out great and looks awesome! All it needs is the cowl (awaiting M2 blind (T) nuts, and I'd like to matte epoxy the cowl and plastic top, but that may come later.
Scotch taped the cowl for pics.
And then I went to fly. I had been delaying because storm clouds were moving in and while winds weren't bad there were some gusts. For the big planes, the 26cc Pulse XT60 and the 35cc MX-Bach these shouldn't be a problem, but something just felt off. I went anyway, because if it was good to fly there would likely be no one there and I could fly the whole time instead of standing around waiting (tomorrow is going to be excellent but crowded). So, I went.
The crash is, of course, at the end. This was the first time I had flown it in over a year, as I didn't fly last summer.
On approach It got wobbly in a tip stall, started to recover enough I crashed nose down wings level. Initial butchers bill looks like the landing gear are toast, the firewall and forward motor box, a hole in the plastic canopy, the under cowl. All fixable though I am not sure how I am going to fix the plastic canopy.... Maybe fiberglass it? Wings and the rest of the fuse are fine. Prop, of course, is toothpicked. A deconstruction will follow and I will have a better idea. This was a save, could have been a lot worse. Crash clock is nevertheless reset.
PM UPDATE: I removed the under cowl and the engine. The under cowl will need to be repaired and re-fiberglassed. The cowl mounts will need replacing as 3 out of four are broken. The canopy hole (rather curious) will need fixing and I suspect that will be fiberglass work as well, though I am not so sure how that will work. The engine is fine as far as I can tell, the 20x8 prop will be replaced with a 19x8 I have on hand. I changed how the throttle servo was mounted as it was in a tray I had made that wrenched loose and I don't like it. The firewall got broke-out attached to the standoffs. The wood is old and frequently drilled from the conversion from electric, so I am rebuilding it. I don't have my jigsaw anymore so will need to hack saw the edge notches. It looks like the firewall sprung out pretty cleanly. I will very much reinforce it, it will be sturdy. The plywood I have is a bit thicker than the stock so it will be stronger. I haven't looked into what I have for landing gear. Nothing as nice as those sweet carbon fiber ones. Such a shame. Glad they gave way and didn't rip out the landing gear hardpoint from the fuse. That would be a mess. All in all not so bad after all.
I was taking a break from the Morane Saulnier Type N because I was struggling to get the cote to work properly. I am no fan of Ultracote.... I was unable to get it to shrink properly without suddenly melting and the edges wrinkling and retracting. It was incredibly frustrating.
I got some new Ultracote since I had started with it. I also decided that the conditions in the environmentally uncontrolled garage (temps in 90s, high humidity) were not helping. I brought my cote stuff into the air conditioned house.
The first couple of attempts didn't go great, but were better. Then on the third try the Cote Gods decided I had taken enough abuse and cut me some slack. It just started working! I was done with all of it in an hour. It's not perfect but actually looks really good! You may notice only the forward dowel is present. I am thinking of screwing the wing in place, and securing the front under the front deck with the pegs I installed in the front of the wing, and crossing them with rubber ands across the fuse. John was worried the front wasn't secure enough, but the rubber bands should secure it with the pegs.
I am very happy with it! The only cote challenge left is making the tricolor rondels. I would like one on each side and two on the top and bottom of the wing. That's 4 large and 2 small. Callie Graphics has them, and if I can find out what the sizes are I may just buy them.
According to the British rules, scaled to a 12" chord, the rondels on the wings should be 10"-6"-2". By math, my Morane is 1/6th scale (26'9"scale wing span, 26*12=312"+9=317"/56" model wingspan = 5.7, so 1/60 scale
I'm going flying tomorrow, should be near perfect conditions. Taking the 26cc Hangar 9 Pulse XT60 and the 30cc MX-Bach. Set them up for the season today. I changed the Pulse's receiver pack from LiPO to a 2400 mAh LiFe battery as the IRs in the original LiPO were poor. The MX-Bach IRs were fine so I am keeping it
Finally caught a break with marvelous weather and manageable gusts on a day off. Flew the Stearman several flights, love that it has stabilization, and maidened the Goldberg Falcon and the long awaited Ultrastick! Only a few pics and didn't do any video (forgot the cam).
One curious battery thin I have never seen before. Charged 4 3S 2200 mAh batteries at the same time (parallel? I can never remember). In all 4 batteries, one cell charged to only about 4v, the other full at 4.2v. This happened on all 4 batteries from the same charge. I decided not to fly with them so I didn't undevolt that one cell, ran them down on the bench while checking the voltage. At 3.8v on 2 cells, the third on was around 3.74v on each battery, so the gap narrowed. The IRs were all less than 6. They ran fine. I charged another set of 4, a different band, and they all charged normally. The affected batteries are about a year old. Curious if they won't charge properly again. Would be a bummer as in this eco no my I won't be replacing them anytime soon.
The gang is all here!
Little wheels and short nose make for easy flip over on landing when running into the clumpies at the end of the runway. The PT-19 flew like a charm! So love this plane. It's a shame Eflite moved away from these affordable balsa delights and sells overpriced foamies in their place.
The Falcon has flown, 4 flights. In the air 3-channel proved no problem for me to adjust to, just as John predicted. On the ground I kept trying to steer with the rudder instead of the ailerons. Of course I kept trying to coordinate my turns in the air. The Falcon has one issue that John is going to investigate. It has a constant hard right roll tendency that I had to control with left rudder. Wasn't able to trim it out with rudder in flight. The wing looks straight and not warped as far as I can tell, and the tail is straight. The Irvine 40 runs like a dream, no issues at all and pulled some nice vertical. I tried the 11x5 Scimitar, and it flew great, but losing just that 1/2 inch of ground clearance lead to one prop stall on the lumpy Geotex. It flies so well on the 10x6, may just get some Master Airscrew Scimitars in that size, but I want some more flight time with the 11x5 first. One thing about nitro is that shit coats this wing thick. I have a muffler extender, chose not to fly with it, but I just might. Also need to bring paper towels.
The tail looks good, in this pic the right side of the main wing looks a bit higher, maybe that's it? Maybe I do see a little warp, the ceiling edge on the right shows more underwing. I bet the wing does have a bit of warp and that would roll it right. The engine is rigged classic down and right so P-factor isn't an issue, and this roll tendency is constant. This made for challenging landings. Little dude is fast with both props. Once we get this roll tendency sorted, this will be a fun plane to fly!
I usually have bigger wheels on the Ultrastick, and am probably going back to them. Hit the taller grass and went right head over heels after a nice albeit floaty flaps landing. I am sooo happy with how it handled. Engine ran great, though it has a gravelly sound to combustion. This is the first time I have heard it without ear plugs. It was getting late what with all the waiting, I wanted another flight, but one of the leading edge wing pegs was a tad loose so I called it a day. Overall all, I am very, very happy. I got used to it running a long ways out, though I hope getting my cataracts done improves my clarity of vision. I feel a lot more comfortable flying the 26cc Pulse XT60 and the 30cc Sbach here. I will probably overfly the parking lot at the business next door on landings with the big boys but no one is ever there.... The Evo 10cc ran great, though I did lean out the low needle a bit more. The idle improved (it was a bit untrustworthy today until I learned it) as did acceleration to FOT. Pretty sure a gasser is going with me every trip to the field.
I had today off for an appointment with my eye surgeon who unexpectedly dilated my right eye, because you know, I had a car-full of airplanes I was taking directly to the field... Dammit... Winds were going to get even better and I was off on a sunny day. I. Am. Going. Flying.
But even though I am an idiot, I waited a while and made sure I could see well enough to fly. I had also brought the Ultrastick to maiden today, but not with one eye, no matter how perfect the weather. The field will require me to fly high with that one and I wasn't going to risk losing orientation.
Hanging in the gang cover at NH Flying Tigers Field,
Derry, NH
Wanting to tune up my go-to plane and continue to re-train my thumbs, as well as make sure I can safely fly with one eye, I flew half a dozen packs on the Alpha Sport 450 first. I have flaperons on it, to slow it down on approaches, but it's already really, really floaty. I think I am going to try spoilerons, and see if that will slow it and make it less floaty. I am beginning to see this revived version really wants to be nose heavy.
For the first time in years I took the vintage Eflite PT-19 Cornell out and up today. It's so light I put a Hobby King Orange stabilization system on it, and it makes a tremendous difference. Speedier and snappier than I recall, it flies on rails. Really enjoyed flying it after the first flight jitters, did about 3 packs.
Flight of the Cornell
I came with only four of ten or so 3S packs charged, so I got to trial the lead setup I ran from my hybrids auxiliary battery. I have to leave the engine "on" so the computer can sense when to, and to charge that battery. Worked perfectly!
I had psyched myself up to maiden the Ultrastick 10cc today, and by late afternoon the conditions could not have been better, and only one totally non-judgy pilot was there. I was sooo tempted, but my right eye didn't un-dilate until a couple hours after I got home. I was not adding that crash variable to the test flight. Benched. I am itching to get that plane up.
The even more exciting part of the day was when I got home, I used a suggestion from John Hayes to make it so the throttle closes when throttle cut is turned on. I had gotten the engine easily started on the first try after years of sitting, and tuned to to run superbly, quite easily. I did have to adjust both needles. But the throttle barrel would not close completely, so I had to manually choke the engine to stop it. John showed me which screw to adjust. There is a spring loaded screw on the back port side of the carb (top in the photo). This screw stops the throttle barrel at the desired position, which for me is fully closed. This is the last pic of that screw, because I didn't realize it was spring loaded, and to allow the throttle to close completely, it had to be fully withdrawn. Yep... Shot out of there like a bat out of hell... It went where screws go when the cross the edge of the workbench... My vintage garage has a stone and dirt floor.
It's in there somewhere, I think. Couldn't even find it with a magnet, but tons of iron chips and aged metals were everywhere.
Nice idle, nice slam to FOT, smooth mid-range,
and throttle cut works now! I got an exhaust extender today
and will install it soon.
Have to work the next 3 days. Sunday's weather is stormy, Monday winds 7 mph but not much gusting after 2p. Hope to maiden the Ultrastick. My rule is only one maiden a day, so the Goldberg Falcon 56 will follow that another day, unless the weather is pristine. A little nervous as I have never flown 3-channel and this field is tight. John says it will be fine!
Flight schedule is to get the Pulse XT60 26cc gasser, the Eflite Stearman (the real balsa one, not the overpriced foamie thing*), and the massive 30cc MX-Bach (MX2 fuse, Sbach wing). I also have the Cosmic Wind (I think a Great Planes 450 size speedster), and my helis airborne. Full summer. Need good weather matching days off.
* I so hate that Eflite went from making affordable beautiful and desired balsa ARFs to selling foamy overpriced crap. This is what kills this hobby. Foamies are fine, l just waaaay overpriced, and just don't fly like the balsa planes. Good small to medium balsa ARFs are hard to find. Muss my Eflite Ultimate, my Pulse XT25 (my all three me favorite plane), and eventually my Cornell and Stearman may expire with no decent replacement.
And it was beautiful! I so needed this success. Like that perfect golf swing that makes you love it all over again, I had perfect flights. Weather and waiting my turn limited the number of flights, but man, it brought me back to my love for this hobby! I was getting frustrated not being able to fly and having no luck when I did, I was beginning to feel like a poser. To boot, there was a crowd, which I don't enjoy, but they couldn't have cared less which made it all the more wonderful. John giving me a new path into nitro with the Goldberg Falcon, reignited my love for the hobby, and today it burst back into flame.
The field was soggy, the clouds threatening, but the winds temperate enough that a crowd showed up early. I brought out my three go-to planes. Sadly, I forgot I had the camera on my head and only filmed one of the last Cubby flights. I am happy that I got to fly all three planes today without any drama.
I decided to start with the Hacker MX2, as I trusted it tilo behave. It did not disappoint and it having gyro stabilization helped keep my nerves manageable. I was able to completely tune out any concern about a crowd. Light gusts challenged but did not freak me out, and helped me regain my confidence. After my remastering basic flight maneuvers, I put it thru some more aggressive aerobatics. I have to be careful as I think my cataracts affect my vision. In the end it all went exceedingly well!
Second flight was with the Alpha Sport. I was pleased that it behaved itself! It seemed a little less powered than with the previous motor, although the specs are the same. It's adequate and I don't intend to change anything. I am so happy to have gotten it in the air and successfully!
Before the rain, I got a couple flights on the Cubby. I remembering to video one flight, which I ended early because I found the control a bit mushy. Much better after tightening it up.
I was out for about 2 hrs, got about 5 flights what with just watching for the first half hour, then waiting my turn. As the rains began to trickle in, I packed up, but sooooo wanted to fly the Alpha Sport again!
I think I feel comfortable bringing the Pulse XT 60 out, and maiden the Ultrastick, and the Falcon even, as long as I keep them close. I have never flown 3-channel and am a bit anxious not having ailerons and direct roll control.
Amazon didn't deliver the igniter yesterday, but it expected to arrive late this afternoon. I will have to charge it, but I hope to get one run on the vintage Irvine 40 on the Falcon to see if it starts and runs. Looking forward to the smell of burnt nitro!
Spent some time in a conversation with Google Gemini (their AI) and learned a lot I hope I knew and forgot about how the opto kill switch is not an IBEC.
The diagrams for the RCExl Opto Kill Switch look like this:
The RCEXL Optical Kill Switch does two things. It uses a light junction to separate the hard wire electrical connections so the 20,000 volts of noise generated by the spark plug do not flow back into the receiver and electronics interfering with them or frying them altogether, AND it serves to kill the power to the ignition. Power to the OKS passes through, so my 2S 7.4v LiPO would send up to 8V to the ignition, if the light sensor inside the is on. Here's how Gemini explained it:
The RCEXL unit has two sides that are "optically isolated" (connected only by a beam of light inside the chip) to prevent electronic interference from reaching your receiver:
1. THE RECEIVER SIDE: It plugs into your receiver to get a signal and a small amount of power just to run the internal LED and the "gate."
2. THE IGNITION SIDE: It has a "Battery In" and an "Ignition Out" lead. You must plug a battery or regulator into the "Battery In" lead.
What happens when you flip the switch:
1. Switch On: The RCEXL unit closes the circuit, allowing power from the ignition battery to pass through to the ignition module.
2. Switch Off: The unit breaks the circuit, cutting off power and killing the engine.
I had my circuit like this:
This works, but apparently it allows interference noise hardwired back into the circuit. Options are a separate battery (two battery system, nice in big airplanes) or one battery and an BEC. Note that with this setup the RCEXL unit LED did not light up... so I think the RCEXL is bad.
Above is how I will be doing this circuit. I purchased a RCEXL Opto Kill Switch with BEC (see below). from Valley View RC. Curiously they are the only place that carries this.
Apparently this (above) is the OPTIMAL way to do this. It protects the circuit by filtering out the feedback, and offers a kill switch. I have one of these on the Pulse XT60 (need to see if I also have a RCEXL switch as this would be redundant).. Pictured below is the Tech Aero one I have, and is most recommended, in that its one of the few out there. Problem is its over $70 delivered, which is why I went with the RCEXL one. IBEC's, especially one with a LED indicator light, are very hard to find, and nothing under the Tech Aero price.
I did drop by the workshop to check a few things, like do I have a IBEC. I have a UBEC but Gemini did not recommend this with the kill switch, and it added more complication to the circuit. I built a little holder to secure the receiver pack, and removed the RCEXL kill switch. I will likely return the one arriving today from Amazon as I don't need it, and am waiting for the one from Valley View, coming by some dude on a bike from Indiana, maybe 3-5 days? Tomorrow I may try firing up the engine without the kill switch, wiring in directly to the battery through a 5V regulator. I am concerned that the touchy EVO 10cc will try what little patience I have left (hence today a day of rest).
I took the Alpha Sport 450, the Hacker MX2, and the Pulse XT60 out to my old flying field, Jopa Hill Fields in Bedford, NH.
The grass is nice but too long, so the Alpha and Hacker has issues. Then a cheesy wiring solution converting the Alpha from EC5 connector to EC3 went wonky, so she didn't even get off the ground. Fixed that when I got back, did it proper.
The Hacker could get off the ground with max elevator and gunning the throttle. Flew wonderfully and I flew 6 batteries, just practicing basic airmanship. Landings were a bust due to the the long grass, she would just tuck in and flip.
After that I felt more or less ready to take the pulse XT60 up. She started right up and ran wonderfully. She still is a bit rich in high, manifesting as a step down when the throttle is quickly brought from full to idle, but it's quick and she reduces well to a good steady and reliable idle. Full open she rocks! As expected, the 15 inch prop doesn't provide enough clearance in grass, so the first landing she prop-stoped herself, and in the second she just broke the prop. I ordered the 14x9x3 I should have done before (am adjustment from 14x7x3). This will give me another half an inch which I hope suffices as I can't go lower on the diameter. I also went up to 9 from 7 on pitch. This should be a nice prop.
I still don't have a formal field with a proper grass or geo-tex runway. Hudson hasn't found a new home, Merrimack is a tight hole in the forest and a bit far off. There's a club in Serry, I think, but they are also in a tight niche with high power lines right there. So I will need to deal with the grass at Jopa. At least it's so much smoother and not as clumpy as several years ago when I last flew here.
