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BJ Craft Anthem

Old 02-18-2023, 04:30 PM
  #26  
barnowljenx
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Just taken delivery of an Anthem. I opened the box hoping there would be no damage and I was delighted to find that everything was in perfect condition. Nice sturdy box and the fuselage is well retained using the wing tube hole to firmly fix the fuselage into the box. A wood cross member also helps to prevent the box being squeezed in. The other parts were all nicely packed in bubble wrap and securely taped into the box. Full marks to BJ Craft's box design.

Weights (in grams) for the bare components are:
Port Wing ............... 316
Stbd Wing ................ 315
Port TP and elevator 88
Stbd TP and elevator 88
Canalyser .............. 102
Fuselage ............... 1044
Rudder ................. 60
Canopy ................ 82
Wing joiner ................65
TP joiner rods ......... 10
I've not included the undercarriage, spats, wheels and other hardware as I might use other stuff. I was very impressed with the wings being within 1 g of each other and the TPs being the same. weight. Well done BJ.
Old 02-21-2023, 04:33 PM
  #27  
BJM
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If your kit is like mine. The longer 2 landing gear bolts are to long. As you tighten them, they will punch holes in tide bottom of the fuselage.
Old 02-21-2023, 05:51 PM
  #28  
wattsup
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BJM, did you get my PM? I am trying to contact Gary Kirby.
Old 02-21-2023, 06:11 PM
  #29  
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I think I replayed.
Anyway - I will let Gary know.
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Old 02-23-2023, 03:06 AM
  #30  
barnowljenx
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Originally Posted by BJM View Post
If your kit is like mine. The longer 2 landing gear bolts are to long. As you tighten them, they will punch holes in tide bottom of the fuselage.
Thanks BJM - I'll be sure to check that point.
Old 02-23-2023, 06:50 PM
  #31  
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Using a laser I found the following with my Anthem.
Horizontal stabs almost perfect 90 degrees to vertical stab.
Left wing about 1/8 inch lower than right wing compared to vertical stab.
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Old 02-23-2023, 06:56 PM
  #32  
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Using the horizontal stab tubes as a “0” reference I found the following angles.
Left wing was at 1.5 degrees.
Right wing was at 1.2 degrees.
Nose ring was at .9 degrees down.
Old 02-24-2023, 05:28 PM
  #33  
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Able to get 2 six minute flights on my Anthem today. CG somewhere between 280 and 320. Almost no trim changes needed. Slight pull to canopy both in left and right knife edge.

Adverrun contra with Kontronik XL20-55, both props are 22/22. TP 6000 10S. Battery not even warm. Motor very hot - have to think about this…
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Old 02-24-2023, 05:41 PM
  #34  
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Old 03-10-2023, 10:53 AM
  #35  
barnowljenx
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Originally Posted by BJM View Post
If your kit is like mine. The longer 2 landing gear bolts are to long. As you tighten them, they will punch holes in tide bottom of the fuselage.
Hi BJM

I took the precaution of checking bolt length

I used the silver bolt to check length and it wasn't quite long enough while the black bolt (supplied) contacted the fuselage as you said. So, I cut 5 mm off both supplied long bolts and all was fine. Thanks for the warning.
What delighted me was that the U/C legs came predrilled and the way they were shaped provided you aligned the front edge to the u/c box the wheels were aligned to run straight ahead. The other astonishing feature was that both predrilled holes in the u/c leg aligned with the slots in the u/c plate! The slots are across the fuselage but there is no real tolerance fore and aft. Well done BJ Craft on some accurate jigging.
Old 03-13-2023, 02:04 PM
  #36  
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Anyone using the Adverrun contra with thee Kontronik XL20-55.
Wondering what kind of temps the motor is running at.
Old 03-14-2023, 04:53 PM
  #37  
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Battery tray with a TP 6000.
Flew 3 flights 2day.
One as seen, one with battery 1 inch forward and one 1 inch back.
Flew the same in all 3 conditions. Slight pull to canopy in knife edge and a pull to canopy on down line.


Old 03-14-2023, 04:57 PM
  #38  
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60 degree day. After 7 minute flight motor temp was 105F and batteries were about 95F.
Old 03-16-2023, 04:19 AM
  #39  
barnowljenx
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BJM - at what stage are you measuring motor temperature? I had an onboard temp monitor on my motor. There was around a 7 deg C rise above ambient when in the air, but as soon as I touched down the temperature would start to rise and by the time I was back in the pits the temp rise above ambient was about 20-25 deg C. I did once take off with the motor temp at 20 deg C above ambient and as soon as I was airborne the temperature started to drop and stabilised at 7 Deg C above ambient.

So, what I learned was either take a temp reading as soon as you have landed or else fit an onboard temp sensor on the motor and monitor it in flight. Checking in the pits is a waste of time as heat soak and lack of cooling air push the temp up much higher than it would be when airborne.
Old 03-20-2023, 04:31 PM
  #40  
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Barnnowljenx - thanks, I agree. 6 more flights and I am getting use to these temps.

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