|Apr 17, 2010, 01:10 AM|
Slipstream Sbach 342 26%. 2 flight videos added on Page 3
Picked this up from a local Slipstream / EG Aircraft dealer, Aztech Aeromodels, last week along with one of the new Slipstream MXS 26% planes. http://aztechaero.goods.officelive.com/default.aspx
I cleared off my bench to get started on this one right away.
Its going together rather quickly.
If you've read any of my previous posts, you may know that I tend to not go with top of the line name brand hardware for EVERY build. I pick and choose based on my needs and wants.
What I will be doing with this model is showing that it does not take thousands of dollars to get quality and reliability in ones electronics, so that they can get into the world of large scale planes for not alot of money. I hate to spend $100+ on a name brand servo, when I can get perfectly good servo's that have a following in the large scale flying world, for much less money.
The servo's I chose to use in this plane are the very good HD-1501MG HV high torque, HV capable analog servo.
I first discovered them after visiting Troybuiltmodels.com and speaking with one of the guys there. These 1501's are high voltage capable so you can get crazy torque at 7.2v. I will be using a Castle CCBEC Pro set to run at 7.2v. This is overkill for this sized plane, but with 284oz I won't have to worry about running out of servo torque.
You can certainly use these on much bigger planes.
The guys at Troybuiltmodels can't keep these in stock. They are really that good. I was told that they have another 1800 inbound.
If you google the servo, you will find them at a couple other mainline etailers for a little less money as well. I ordered another 10 of them at ValueHobby.com for about $14 each. Amainhobbies.com also sells them.
Here are the specs.
Operating Speed: 0.16/0.14 sec/60°
Stall Torque: 215oz-in. at 4.8v, 236 oz-in. at 6.0v, 284oz-in. at 7.2v
Dimensions: 40.7x20.5x39.5 mm
Operating Voltage: 4.8v/6.0v/7.2v
NOTE: If you prefer digital's the HD9150 HV's are awesome as well
The newest digital from Power HD that is High Voltage capable is the HD-DS120MHV
To go along with these servo's, I purchased the Secraft Anodized aluminum arms from Aztech Aeromodels. These are very strong and functional bling.
I went with 1.0" arms for the elevator and ailerons, and a 1.25 for the Push Pull rudder.
I'm going electric on this. What I've chose to use for this build is the Infinite 5020-250, available at OKHOBBY.HK
Don't let the inexpensive price fool you into thinking this is cheap chinese junk. Order one, get it in your hands, fire it up, and marvel at the smoothness, power, and the precise machining that is obvious. These are currenly on sale. Get them while they have them.
powered by 7s (5+2) 5000 lipo packs in series. Using a Xoar 19x8 prop, my amp draw is approx 42amps at WOT, with a little more than 1250 watts. It may not be alot of watts on 7s, but it really is pulling hard. Once I get it airborne, I may go 8s for subsequent flights, but for now, I'm seeing 7s as very suitable.
EDIT: After more testing of the power produced, I've decided to change things up a bit. This is a very light airframe so I'm going to use a Single 6s 5000 lipo in this unit. The motor will be the Infinte A4035-360
I will be testing out the power using a Xoar 18x8 and a 19x8 wood E prop
Specs of the plane
Wingspan: 72" (1830mm)
Length: 67" (1700mm)
Weight: 9.9-11 lbs (4500g-5000g) This is an approximation of what you may come up with based on your hardware installation and choices.
NOTE: I have weighed my plane with all components and my approx ALL UP WEIGHT will be 9.07lbs
Wing Area: 1023sq in (66 sq dm)
Engine: .91-1.20 (2C); 1.10-1.40 (4C); 24-32cc Gas
Radio: 4ch, 5-6 servos
You can replace the aluminum wing tube and landing gear if you want to lighten up this bird a little more.
This is what I've spent for this build.
Airframe approx $300 (let Azhar quote you a price shipped)
Power HD 1501M HV $15 x 4 $60
Castle CCBEC Pro = $39
Castle Ice 75 = $99
Infinite 4035-360= $38
Xoar 18x8 wood E prop = $18
2 x 24" 22gauge servo extensions = $8 (elevator and rudder)
2 x 8" 22gauge = $6 (ailerons)
3 x Secraft 1" aluminum arms $30
1 x Secraft 1.25" aluminum arm $10
Total completion cost for my plane as planned is $608!
I have Spektrum and Fasst receivers as well as 6s 5000 packs already so I did not factor these into the cost of the plane.
The owner of Aztech Aeromodels, Azhar, is a local flyer and is a great guy. Give him a call if you are interested in one of the EG or Slipstream by EG aircraft. He is a site sponsor and active here on RCGROUPS as well as FlyingGiants.com
425-785-0786 (9am - 6pm PST)
Tell him Chuck from Woodinville sent you and I bet you will love the price he quotes you shipped!!
Here are some starter pics of this build.
My goal is to maiden and have video taken of this plane, along with at least one of the Slipstream MXS's that I bought, on Saturday May 8th at my club's Fly In, but I probably won't wait that long.
Pics of the motor/esc install as well as the rest of the electronics will be coming soon.
ImagesView all Images in thread
|Apr 17, 2010, 09:47 AM|
I've been keeping an eye on these Slipstreams, they look super good. If you would please what's the ball park price (airframe and set up). Also what size lipos are recomended, or do you plan to use?
I would love to budgit slightly bigger planes into my fleet.
|Apr 17, 2010, 03:19 PM|
By the way, this is the first kit I've worked on where I didn't need to replace any of the hardware parts. Some planes, I go with sullivan or Dubro parts that I feel are better suited to the assembly.
This kit has everything I need and all the misc parts are perfect for the job.
Another thing I found very cool was that the manual gives you the lengths you need, hole to hole, to create the ball linkages. They are spot on perfect lengths to end up with no need to use subtrims on the radio to get things to line up.
Of course if your servo arms don't fit perfectly at a 90 degree angle from the servo, a little subtrim tweaking might be needed, but for my build and using those aluminum arms, it all worked out mechanically.
|Apr 17, 2010, 04:16 PM|
|Apr 17, 2010, 04:31 PM|
I've noted the all up cost for MY plane in the main post. You can save some money by selecting other partz for your build, but $640 is cheap to get a 72" plane up in the air.
As far as the lipo's I am using for my larger planes, I've been buying up the Blue Lipo's from hobbypartz.
I've got a collection of 5s 5000's, 2s 5000's, 4s 5000's and 3s 5000's
What I have in my stock allows me to be very flexible if I wish to go 6s, 7s and 8s.
|Apr 17, 2010, 07:37 PM|
It does look good!
|Apr 17, 2010, 07:59 PM|
|Apr 17, 2010, 10:40 PM|
Cryhavoc38 thank you for the price list and total....I am going to watch this thread for updates. I believe I ve seen some of your posts, and they have planted seeds in my head, regaurding more economical brand electric components. My 51" &57" 3dh with topshelf name brand electronics costs are in the same ballpark.
As I have become more capable behind the sticks I have found I am needing excessive power less and less. Please keep updating your succeses.
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