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Post by Burkeomatic on Aug 17, 2022 4:46:00 GMT
 The airloader will be finding a new home, decided I wanted to join the 100mph FPV club. I kind of always wanted one of these, I about bought one instead of the airloader. I also wanted an efficient single motor plane. This checks the speed and efficiency boxes. I will be using an omnibus flight controller, and I already have the batteries and equipmemt for it so I should be good to go. |
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Post by Burkeomatic on Sept 10, 2022 3:05:48 GMT
Got it in today. I have started by apying the tennessee skid plate and vinyl on the hatches. You know, important stuff.  |
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Post by Burkeomatic on Sept 12, 2022 5:27:22 GMT
Flew for 10 seconds on the maiden, not sure what happened. I used autolaunch, it corkscrewed upward in a semi out of control fashion, I aborted, and it lawndarted. Minimal damage. One of the servos was unhooked, not sure if that happened due to the crash, or was the cause. Could have also been a bad throw, I havent launched a plane with a pusher prop like this and I was kind of timid. I frisbee toss my wing. I wont use auto launch until I am sure the plane is good to go. Everything bench tested fine. One small foam tear and the motor mount broke off. I printed an improved motor moumt and I dropped to a 5 inch prop incase torque was the issue.  |
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Post by Burkeomatic on Sept 14, 2022 4:20:23 GMT
Got the FC all sorted, and the all important vinyl. Took her out to 2km today.  |
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Post by Burkeomatic on Sept 14, 2022 5:00:40 GMT
First impressions - This plane is easier to fly than the dragon. I am running it on full rates and it isn't nearly as twitchy or as aggressive. I don't know if it is a beginner plane, but it is close. Pros - It is efficient. It cruises about 50mph or 80kmh sipping about 4.5a. Half that of the airloader, and a good bit below the 7.5-8 amps of the dragon. You can cruise slower, and get way more efficiency. It doesn't look like it, but it can slow way, way down. The speed envelope on this thing is insane. My s800 would have dropped out of the air at some of the stuff I pulled on this thing. I haven't stall tested it, but for all intents and purposes, it is gentle from the reviews I read. It climbs like a rocket, much like the dragon, you can be at illegal heights in just a few seconds. It deals with the wind well. Had 25mph gusts and you wouldn't have known it. Boatloads of space. I hate cramming crap into a plane, and you just don't have to with this. It goes about 80mph. It doesn't go 100mph on the stock set up like some claim, that alishinmao guy lies about everything though, never trust his reviews. But it is good and fast and flies like it is on rails, it reminds me of the mig29 oddly enough. Looks absolutely badass. Runs off cheap electronics. 2 9G servos, a 2207/2307 motor, 30a esc, 2200mah 4s batteries, and you are golden. I could fly for 2 hours straight with the 4 batteries I have, crazy, huh. Cons - No rudder - Lining up for landing on a empty 2 lane street is easy enough still, but some fine rudder control would be nice. I don't use a rudder that much though. Some people have put a rudder on one of these, but I don't think I want the added weight and complexity. Can be nose heavy. We will see how things balance out when I put the runcam thumb and 3d printed nose on it. Looks fugly with a gopro. I am not going to use one since I didn't want to ruin the sleek appearance of the plane. But with the go pro nose, it looks like you literally just hacked the nose off and stuck the gopro on. I know looks aren't that important, but it is something for whatever reason I couldn't get past. I bought the runcam thumb specifically to get HD video from this and my Mig 29.  Overall, if you want an inexpensive FPV plane, or a LOS flyer that is stable and hauls ass, lots of people just use these line of sight because they are good planes, then this is for you. I can't say it replaces my dragon as my favorite plane, but it is easier to deal with due to size, but lacks the brute force of the dragon. It is definitely beside it. It is more refined and requires a bit more throttle finesse. This gets classified as a flying wing, but it does have quite the fuselage huh. It is somewhere between a wing and a forward swept delta I guess. Semantics. It has my seal of approval. |
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Post by Burkeomatic on Sept 15, 2022 4:18:55 GMT
Got my runcam thumb nose printed and installed. Looks way better than the go pro nose.  Here she is after the first full HD flight. I put nearly a full 2200mah pack through it. I logged 18km using 1376mah, that is 76 mah/km. Could probably do better too!  |
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Post by Burkeomatic on Sept 26, 2022 4:05:50 GMT
I think this would be a good beginner FPV plane for an already established LOS pilot. I have some crappy aliexpress 4s2p batteries, and while they don't offer the capacity of the normal 4s2p batteries, and won't have a home in my dragon, they are lighter than a 4000mah pack and work well in this particular instance.
The aliexpress batteries say they are 9000mah, but in reality, I can only use them as a 4000mah, they fall out at 3200mah, so I usually land after using about 2800mah. So I just treat them as a lighter 4000mah battery.
Weight with a 4S1P is 750g. - About 15-20min flight time, gotta be really careful with the current.
Weigh with a 4S 2200 is 800g. - Solid 20 min flight time. No current restrictions, this is the best for acrobatics and vertical climbs.
Weight with 4S2P is 900g. - 30-45min flight time. A little more sketch to launch with the weight, some current limitations, 10a sustained and 25a on burst. Feels porky when you land it and a little more nose heavy, good for long range cruises where you won't be doing insanity, better in the wind too.
Weight with 4S 4000 975g. - I haven't flown this yet, I see no need. I would have to modify the plane a little, not that much, but enough to be annoying. It would have boatloads of unlimited power and range, but would be porkier yet still and you probably wouldn't be able to put that power to use. I guess this would be the ideal if I wanted to fly a 20km mission at 80mph and not have to worry about battery capacity.
I have a ''real'' 4S2P from CNHL coming in that uses genuine samsung cells and is rated for 5400mah, so hopefully those will be nice. The nice 7000-9000 mah liIon packs are like 90 bucks... I need to learn to build my own for that price.
I printed this nose using 6 percent infill, because this plane leans toward nose heavy. However, it would be better with 10 percent because it likes to warp in the areas where there is no infill.
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Post by xsrcing on Nov 11, 2022 4:06:51 GMT
Such a bad ass looking aircraft.
I call them planks, just like the Goblins.
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Post by Burkeomatic on Nov 11, 2022 5:27:43 GMT
Such a bad ass looking aircraft. I call them planks, just like the Goblins. This and the dragon are my two faves. The sparrow flight controller gave me some issues, I think I posted about it on RCG somewhere. But that was because the power supply wasn't ''filtered'' so I put a capacitor on it and that took care of it somewhat, then I put a lowpass filter on it. I have switched this to INAV though, but I haven't got it in the air since. I bet the 4S1P battery I built for this would go well in your goblin. |
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Post by xsrcing on Nov 11, 2022 8:15:14 GMT
Such a bad ass looking aircraft. I call them planks, just like the Goblins. This and the dragon are my two faves. The sparrow flight controller gave me some issues, I think I posted about it on RCG somewhere. But that was because the power supply wasn't ''filtered'' so I put a capacitor on it and that took care of it somewhat, then I put a lowpass filter on it. I have switched this to INAV though, but I haven't got it in the air since. I bet the 4S1P battery I built for this would go well in your goblin. I've only flown the Goblin on 3S so far. It only has a handful of flights. It loves my big E-Flite 3200 mah 3s. If I can get more volts and capacity with a li-ion I am all for it. Even though I haven't flown for more than 15 minutes yet. I just bought a RDV1 from a local guy. Got a really good deal on it. No idea what I am going to do with it yet. |
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Post by Burkeomatic on Nov 11, 2022 19:03:36 GMT
This and the dragon are my two faves. The sparrow flight controller gave me some issues, I think I posted about it on RCG somewhere. But that was because the power supply wasn't ''filtered'' so I put a capacitor on it and that took care of it somewhat, then I put a lowpass filter on it. I have switched this to INAV though, but I haven't got it in the air since. I bet the 4S1P battery I built for this would go well in your goblin. I've only flown the Goblin on 3S so far. It only has a handful of flights. It loves my big E-Flite 3200 mah 3s. If I can get more volts and capacity with a li-ion I am all for it. Even though I haven't flown for more than 15 minutes yet. I just bought a RDV1 from a local guy. Got a really good deal on it. No idea what I am going to do with it yet. How much room is in the original goblin, I have only even built a scaled up one. The reason I ask is I have never built a 3s1p battery if you are doing the 3s thing, and if you were to buy 3 batteries and mail them to my house, I would make a 3s1p pack for you since I have never built one before. I have all of the stuff except for the 21700 cells. |
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Post by xsrcing on Nov 13, 2022 1:28:46 GMT
I've only flown the Goblin on 3S so far. It only has a handful of flights. It loves my big E-Flite 3200 mah 3s. If I can get more volts and capacity with a li-ion I am all for it. Even though I haven't flown for more than 15 minutes yet. I just bought a RDV1 from a local guy. Got a really good deal on it. No idea what I am going to do with it yet. How much room is in the original goblin, I have only even built a scaled up one. The reason I ask is I have never built a 3s1p battery if you are doing the 3s thing, and if you were to buy 3 batteries and mail them to my house, I would make a 3s1p pack for you since I have never built one before. I have all of the stuff except for the 21700 cells. let me go measure the battery bay really quick. I may just have some cells drop shipped to you! Edit: 36mm x 58mm x 135mm. But it is foam board so those can be changed. |
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Post by xsrcing on Nov 13, 2022 1:51:04 GMT
I don't know how to post pics on this board. But I have modified my Goblin heavily. Receiver, vtx, FC are on top of the wing and accessable via removable 2mm chloroplast panel. ESC is under the wing and the entire bottom panel hinges open so the ESC and motor can be accessed. There are several pics on the FT forum.
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