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- This topic has 10 replies, 5 voices, and was last updated 13 years, 9 months ago by DAN BERRY.
05/18/2009 at 2:26 pm #41121
Well since I like the Geodetic Galaxy plane so much I decided to build a “B” electric version. Below are the results of my efforts. It’s a “585” Galaxy with the wing and stab shortened, resulting in a wing area of 497 inches. Power is an AXI knockoff that states a static KVA of 2200 rpm. Power is an Enerland 1200 mah, 30c, 3s battery, Jeti 30 amp controller, Starlink timer with servo D/T and I’ve also included a fuse type D/T for shorter than 2 min. flights. Inital prop choice is an 8×4 folder using a Jennings hub. Total weight came in at 19 ozs.(540 grs.) which translates to .92 grams/sq. in. of wing area. Hopefully will get a chance for test flying this week.
05/18/2009 at 2:27 pm #47362
05/19/2009 at 12:29 pm #47363ARAM SCHLOSBERGParticipant
Nice looking model!
Starlink chips can be customized. For example, I have just requested a chip with the following features:
* Motor runs at 5 seconds increments.
* Shaving the motor run with .25 second increments (so you could get a 4.75 second motor run).
* DT at 30 seconds increments.
* VIT , which is something I’m experimenting with.
Since the servo has three positions , an auto rudder (AR) can be linked to the end of the motor run. So the chip can support VIT, AR and DT.
You could order this chip and eliminate your back up fuse. An AR is also a nice feature to have.05/20/2009 at 2:29 am #47364Jim JenningsParticipant
Beautiful model Scott. All of the numbers fit, should be a winner. Don’t forget the back-up fuse 8)06/01/2009 at 1:56 pm #47365
Well, got a chance this weekend to start the trimming process on the Elec. Galaxy. Initial pwr. pattern had a right hand turn, added right thrust and pattern was vertical. Added right rudder and had a tight right had turn, took out a little right rudder and pattern was perfect, about 3/4 right had turn in a 5 second power run. I was running a quick DT during the pwr. trimming! Lit the fuse for about a 40 second glide and launched. Transition was dead flat and the right hand turn glide was picture perfect! 😀 Flew three more times with the same settings and had exactly the same results 😯 😀 The pwr. arrangement as stated before is great. Due to available flying site size did not try any longer pwr. runs, height would be too great! Looking forward to the Nats!!!
Scott06/01/2009 at 3:06 pm #47366George ReinhartParticipant
It’s a greaat looking model.
Stick a 90 gram battery in it and fly Q too.
You’re going to make Jim and Dan have to work a little harder.
Cheers!06/01/2009 at 5:49 pm #47367
Pete, I have a B Maverick allready set-up and ready for F1Q! AXI 2212-12 pwr’d! It’s a rocket!!! Galaxy will be a great back-up though!
Scott06/08/2009 at 2:02 pm #47368
Went to Atlanta for the monthly Thermal Thumbers event at the Sod farm. Galaxy was flying great pwr. pattern great, transition great, glide great! 😀 Than pilot error raised it’s ugly head again! 👿 😥 At launch did not realize that the stab had jumped the stop and was sitting on top of the stop thus adding 1/4″ of negative decalige (sp)!!!! Needless to say at the rate that it was flying the resulting nose dive at full power and the crash was interesting at the least. Fus. was toast, stab un hurt, Wing, one tip broken but repairable. This is a testament to the strength of the geodetic contruction method. Already have the second fus. build underway. We live and learn!!!
Scott06/08/2009 at 5:39 pm #47369DAN BERRYParticipant
Use a SHOC mount and eliminate the problem. No forward stop means it’ll get onto the forward stop.06/08/2009 at 5:44 pm #47370
Dan, Please explain a SHOC mount?
Scott06/08/2009 at 6:13 pm #47371DAN BERRYParticipant
Same as what’s on the 1/2A Marval from last year’s Model Aviation article.
Ply plate with a slot that creates tabs for the rubbers to engage. The stab can slide forward in an ‘unintended structure to ground interface’. I don’t even wrap the rubbers around the fuselage.
Essentiallt the rubbers create the forward stop. Always use the same size and quantity of rubbers.
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