Wattflyer RC Network: RC Universe :: RCU Magazine :: RCU Forums :: RCU Classifieds :: RCU User Reviews :: RCU YouTube
Home Who's Online Calendar Today's Posts RealTime Post Spy Mark Forums Read
Go Back   WattFlyer RC Electric Flight Forums - Discuss radio control eflight > Electric R/C Airplanes > Scratch and Kit Built Aircraft
Register Members List Wattflyer Extras Articles Search Today's Posts Mark Forums Read Social Groups

Scratch and Kit Built Aircraft Discuss and share your scratch built or kit built aircraft as well as building techniques, methods, mediums and resources.

Thank you for your support (hide ads)
 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 09-23-2012, 06:55 PM   #1
Stevephoon
Super Contributor
 
Stevephoon's Avatar
 
Join Date: Aug 2005
Location: White Lake, MI
Posts: 1,018
View Stevephoon's Gallery67
Thanked 108 Times in 106 Posts
Club: United Flying Organization
iTrader: (1)
Friends: (8)
Default #35 Model Airplane Building Clinic >> DJAerotech Chrysalis 2m Electric Sailplane

This is build #35 of the Model Airplane Building Clinic sponsored by Murcoflyer. Please checkout the other builds by going to the base/start thread.
http://www.wattflyer.com/forums/showthread.php?t=67588

I have never had or built a glider before. So this will be new for me. Any and all comments and pointers are not only welcome, but encouraged! I’ve also sent a message to Don Stackhouse who’s the designer of the Chrysalis and part owner of DJAerotech to see if he can follow along and give me some tips. He’s active over on RCGroups, hopefully he can come to WattFlyer as well.





Here's the specs from the DJAerotech website.

Chrysalis 2M Electric Sailplane by DJAerotech
http://www.djaerotech.com/dj_product/chrysalis2m-e.html
Specifications
Wingspan: 78.5" (2.0 meters)
Wing Area: 723 square inches
Fuselage Length: 47.6" (1.21 meters)
Wing Loading: 7.37 oz./sq.ft. (Li-poly battery)
9.44 oz./sq.ft. (nicad battery)
Weight: (outrunner motor, 14-9.5 prop, separate 270 mah 4-cell NiMH radio battery)
37 ounces w/ 2-cell 2000 mah Li-poly motor battery
47.4 ounces with 7-cell RC2000 nicad motor battery


The Chrysalis was originally designed for a Speed 600 and NiCad batteries. I’m planning to go brushless and use some of my LiPos I already have. So here is my current plan… If anyone else has some good ideas, please chime in!

My Goal is to have a lightweight plane that can accept many different batteries to adjust the final weight. That way I can go very light for when there is almost no wind, but heavier for windier days. I also do not have a lot of storage room, so I’m thinking of the three piece wing option. It would be great to end up with the plane weighing about 30 ozs without the battery.

I’m thinking of using a lightweight brushless motor in the 250 Watt range. This is about where the 480 sized motors are and you can find both 35-xx and 28-xx sized motors in this power range. The included firewall is made for a square 25 mm bolt pattern and a rear mount motor. So far I am thinking that the HeadsUpRc Firepower 480 would be a good fit.
http://www.headsuprc.com/servlet/the...h-11%29/Detail
It’s a 260 Watt, 35-30 motor with a 25mm x 19mm bolt pattern. It should fit the included firewall with just creating two new holes. Since this motor weighs only 2.6 oz, I’m planning to stretch the nose by 1.5 to 1.75 inches as well. I have read about others doing that with good success. If I can keep the plane balancing neutral with the motor, then the batteries can still sit under the wing like in the original design.

The plane can optionally use either a conventional or V-tail setup. I’ve read that the V-tail is slightly lighter, so I’m planning on going that way. I also like the looks of a V-Tail better, so it’s a easy decision.

In Summary here’s what I’m planning.

Chrysalis 2M Electric Sailplane with 3piece wing and V-Tail options.
Stretch the nose by 1.75 inches.
Reuse the following components that I already have:
Spektrum AR500 receiver
32 Amp ESC (Powerup from HeadsUpRc)
1.5 in Folding Prop Spinner for a 4mm shaft.
10x6 Folding Prop
Covering from Hobbypartz. (Trans Purple, White and Black?)

Purchase the rest of the needed components:
2 9gm servos (V-Tail)
2 5 gm servos (Spoilers)
Servo Y cable (For Spoilers)
250 (or so) watt blushless motor
Folding Props/Spinner as needed for the Motor selected


Building will be slow for a while, but I thought I'd get started!

Steve


Attached Thumbnails
Click image for larger version

Name:	IMG-20120922-00007.jpg
Views:	324
Size:	187.3 KB
ID:	162785   Click image for larger version

Name:	IMG-20120922-00011.jpg
Views:	366
Size:	111.3 KB
ID:	162786  

Growing the fleet!
Stevephoon is offline  
  Reply With Quote
 

  WattFlyer RC Electric Flight Forums - Discuss radio control eflight > Electric R/C Airplanes > Scratch and Kit Built Aircraft

« Previous Thread | Next Thread »

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Model Airplane Building Clinic >> Begins 29 Sep. All Skill Levels Welcomed Murocflyer General Electric Discussions 282 11-04-2012 11:35 AM
#27 Model Airplane Building Clinic >> Mimi DLG 1 meter polyhedral<< aeroknot Hi-Performance and Sailplanes 94 10-23-2012 01:59 AM
Model Airplane Building Clinic Murocflyer Scratch and Kit Built Aircraft 2 10-01-2012 11:53 PM
Model Airplane Building Clinic - - Instructors Needed Murocflyer ParkFlyers 9 09-21-2012 02:55 AM
#28 Model Airplane Building Clinic >> Dick's Dream Unclebuck21228 Scratch and Kit Built Aircraft 10 09-19-2012 02:55 PM


All times are GMT +1. The time now is 04:47 AM.


Powered by: vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2005 WattfFlyer.com
RCU Eflight HQ

Charities we support Select: Yorkie Rescue  ::  Crohn's & Colitis Foundation



Page generated in 1.78068 seconds with 122 queries