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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Sat Aug 25, 2018 7:45 pm 
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Joined: Thu Aug 25, 2011 9:14 pm
Posts: 1910
Location: Bryan, TX
I worked on the Synergy 516 canopy a bit today. I had to order some 2.5mm bolts to hold the front magnets. I neglected this with my McMaster order but I suddenly had some Amain cash to spend. I also got a main shaft for the 516 in the order.

I got the front magnets on and then put the magnets on the canopy. A part of the canopy portion is to put a plastic spacer in. Once I got everything situated I did a test fit and I had trouble getting the rear of the canopy on.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Sat Aug 25, 2018 7:46 pm 
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Joined: Thu Aug 25, 2011 9:14 pm
Posts: 1910
Location: Bryan, TX
Turned out the front spacer was not needed on the frame and after I removed it, the canopy fit like a dream.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Sun Aug 26, 2018 9:01 am 
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Joined: Thu Aug 25, 2011 9:14 pm
Posts: 1910
Location: Bryan, TX
I had another problem with the DeJaVu that I think I have fixed. My tailwheel used a compression type washer to hold the tailwheel at the right height in the mount but over time this loosens and then it the wire starts to come out and leans making constant rudder correction when beginning the takeoff roll constant.

I decided to try a small wheel collar I have from a small electric 3D plane I used to have and it seems to do the trick. We will see how it works once I reinstall and have everything ready to fly again. The addition of the wheel collar added a gram to the weight of the tailwheel.

According to a few retailers, the Jeti SPIN 99 wieghs 100 grams. The ICE 80 HV I had originally weighed 81 grams so between the additional weight of the Jeti and this wheel collar, I've added 20 grams bringing my calculated weight up to 5072 grams.

I started looking around and there were a few things that literally did nothing. There was a piece of black foam rubber that I removed (2 grams, so my net addition is now 18 grams), some pieces of velcro including a piece that the ICE 80 HV was mounted to the base of the fuse with that weighed 6 grams (net addition now 12 grams). So with the Jeti my weight should be 5064 grams before I mount it. I weighed the harness for the arming plug and that was 46 grams.

I believe this is where I can save some more weight. What I may do is mount the back of Jeti to the front of my battery tray and then have a piece of wood or build something with wood and CF that spans the width of the fuse to mount the front of the Jeti to. In doing this I can have the input leads coming up the sides of the battery tray and try mounting my batteries with the outputs facing the rear of the plane instead of the front and be able to shorten up my wiring for the arming plug. I measured a ~15.5mm of the ICE 80 HV input wires and it weighed 10 grams.

I'm going to look at how far back I can comfortably turn the outputs from the batteries and see what we can do along those lines. If I need to, I can add a little bit of velcro to the batteries to use a small bit of velcro strip to steady the connections and remove any stress so they don't come unplugged. Sure this would add some weight but the goal is to remove some of my wiring and continue to use the GForce batteries. I like the HV LiPo packs from F3AUnlimited.com but that would require adding another charger and finding a way to take my PowerLab8 to the field. My ideal setup right now is 3 sets of batteries and 2 chargers. I could use the PowerLab 8 to charge the HV packs, just run 2 and charge at 2C when practicing but the other issue is I need some weight towards the front due to the 2 rudder servos I have in the tail from the split rudder. So I could with the HV packs and charge to 4.25V/cell and be legal but I may just end up having to add nose weight to get the plane to balance.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Sun Aug 26, 2018 8:27 pm 
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Joined: Thu Aug 25, 2011 9:14 pm
Posts: 1910
Location: Bryan, TX
I made it to the field this afternoon. I got 3 flights on the EF Edge and 2 flights on the EF Yak. On both planes, I worked on the mixes so the planes would fly neutral in knife edge.

In the Edge I burned a good bit of fuel. Part of this was trying to fly precision maneuvers and I found it needed a good bit of airspeed to do them properly. So I might try a different prop and see if I can get a good mix of speed and thrust to pull out from a hover. I believe the Vess 24B allows good slow 3D performance but the plane could perform better with a prop capable of producing higher speed.

The covering over the pipe tunnel also came off again while flying the Edge. I'm thinking about getting some of the Monokote Trim Solvent to use to try and hold it on.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Sat Sep 01, 2018 12:20 pm 
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Joined: Thu Aug 25, 2011 9:14 pm
Posts: 1910
Location: Bryan, TX
I managed to get the Jeti SPIN 99 mounting figured out this week while on a work trip. This morning I soldered everything up and cut some pieces of basswood to mount the ESC to. I put 2 blocks on the back to help raise it up so the airflow will hopefully be more evenly distributed over the heat sink. I also had to clip off the tips of the screws for the 2 front blocks.

I haven't shortened up my wiring due to not being sure how much I'm going to need with the new setup. So my ESC and wiring all up weight is now 174 grams and my calculated weight is 5090 grams.

I glued the basswood blocks in with some 30 minute Z-POXY since I didn't have any 60 minute recommended by JPC. I can pick up the plane by the ESC though.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Sat Sep 01, 2018 4:24 pm 
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Location: Austin, TX
Notorious B.E.N. wrote:
I can pick up the plane by the ESC though.
That should suffice. :rolling

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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Sat Sep 01, 2018 7:43 pm 
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Posts: 1910
Location: Bryan, TX
I made it to the field this afternoon to get 2 packs through the DeJaVu. It feels like the Q80 is capable of more top end power with the Jeti SPIN.

I did 5 takeoffs and landings and I have an idea of where to put the packs to achieve the same CG as before. I made a couple marks so I can get it back close to where I had the packs today and of course the reference line for my previous spot.

It was a bit windy at 100 + feet AGL so I'm going to have to wait for a calmer day to really fine tune the CG. I wanted to wait and get some flights in over the long weekend but it's supposed to rain through Tuesday so we will see.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Tue Sep 04, 2018 7:32 am 
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Location: Bryan, TX
I committed a little bit of RC yesterday. Didn't get much sleep the night before unfortunately due to an elderly dog that has sundowners syndrome.

I wanted to get the wings for the Skeeter at the same stage and possibly joined together so I cut the pieces of balsa for the top and bottom of the main spar and glued in them in. For some reason it didn't setup right at the root so I hit it afterwards with some medium CA and clamped it.

After that I worked on the wiring for the Synergy 516. Not the cleanest but it'll work.

I began by installing the ESC and the main thing was to sit down and think about where I wanted the wires to go. I also wanted the tabs on the Brain2 to face the rear whereas a lot of people are doing theirs facing the main shaft. I am more than willing to remove the 4 bolts of the receiver tray to access the USB port if needed and I am more interested in being able to unplug and plug servo and ESC connections as needed. I also needed an extension for the S. Bus cable so I used one of the Hansen HD 6" Y-harnesses I have. I plugged one of the BEC wires from the HW 100 V3 in to it so I have 2 power leads going in to the RX and flight controller system.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Tue Sep 04, 2018 7:37 am 
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Location: Bryan, TX
To end the day I sanded down the spar top and bottoms and then checked the alignment of the two wing halves for the Skeeter. Everything lined up nicely so I glued them together. I found a copy of the manual on RCG and it turns out I should have glued together the main spar pieces and the trailing edge before doing the ribs but oh well. It turned out OK so no losses and it wasn't a hard fix.

I also got my batteries velcroed and strapped to the battery trays for the 516. I just need to redo the loctite on the head axle, adjust the turnbuckle lengths slightly on the ball links, and then program the Brain2. I guess also check the programming in the ESC among a few other odds and ends will come up to. Maybe I can maiden it this weekend.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Tue Sep 04, 2018 10:02 am 
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Location: Austin, TX
Sweet! I actually did some RC stuff too. :thumbup:

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