HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Sep 06, 2008, 10:52 AM
Registered User
Duxbury, MA
Joined Sep 2007
34 Posts
Build Log
1st glider build - Sig Riser 100 electric conversion

Have been flying fuel and electric planes for about a year, 3-4 builds. Would like to try an electric glider - chose Sig Riser 100 - LHS had one. Plan on the following gear:

BP Hobbies 2826-6 Motor 730 kv - similar to eflite power 25
CC Phoenix 45
Flight Power 3s 2500 20C
Aeronaut 14x7 folding prop
Futaba 3004's for rudder and elevator
HS 55 for spoilers - one each wing

Planned mods:

New ply firewall on shortened nose for motor mount 3 deg downthrust
2-56 rods for control linkage rudder and elevator
Re-enforce fuse around wing TE
Sig AeroKote Lite covering - have extra

Any thoughts, suggestions, comments would be welcome.
mikeyflight3 is offline Find More Posts by mikeyflight3
Reply With Quote
Sign up now
to remove ads between posts
Old Sep 06, 2008, 11:34 AM
User
robh's Avatar
Napa, California
Joined Jul 2006
2,521 Posts
Hi Mikey... go for it, sounds like it could be fun! Please keep us posted as the build progresses - pics are always good too.

Cheers,

Rob
robh is offline Find More Posts by robh
Reply With Quote
Old Sep 06, 2008, 12:19 PM
Registered User
Duxbury, MA
Joined Sep 2007
34 Posts
Beginning fuse - cut off and angled nose for new firewall
mikeyflight3 is offline Find More Posts by mikeyflight3
Reply With Quote
Old Sep 06, 2008, 12:24 PM
Registered User
Seahag721's Avatar
Joined Sep 2007
38 Posts
Hey Mikey keep us posted on the details of your build. I've been debating on one of two planes the dynaflite butterfly or the sig 100. I'm leaning toward the Sig 100. At any rate here is http://www.rcgroups.com/forums/showthread.php?t=319505 another thread of a sig 100 conversion if you haven't seen it already. :-)
Seahag721 is offline Find More Posts by Seahag721
Reply With Quote
Old Sep 06, 2008, 12:30 PM
The Lone Blue Plaid Flyer
Bob Cook's Avatar
Seattle
Joined Jan 2003
7,567 Posts
Hay Mike,

I just finished doing this mod a few weeks ago. I added 2 ea 6 inch wing tips to it. I call it the Riser 112. Everything your doing looks good, as far as the planned equipment goes. Here is a shot of my plane. There is a build thread on it here too. Your gonna love it. It flies great.

Bob in Seattle
Bob Cook is offline Find More Posts by Bob Cook
RCG Plus Member
Reply With Quote
Old Sep 06, 2008, 03:03 PM
Blueplaidcanard flyer
sdy. ny
Joined May 2007
2,972 Posts
Mine uses an E flight 15 motor,with a 12x7 apc. With the motor you have expect 85+ deg climbs.You might want to put 3 deg right and about 5 deg down on that for the thrust lines.The power system you have sounds awsome,but do make sure the wing is flat as per plan so no surprises come at you.On the fuse put a doubler of 1/8 light ply from the cut outs left from the kit on the inside of the fuse behind the former at the back of the wing,even if you use the bolt on wing the aft dowel holes are a weak point.While you are stiffening things up,add some corner gussets to the stab,don't worry the motor and battery will offset the weight.To cool the works use a plastic spoon scoop on the battery hatch and remove the covering from the last lightening hole in the fuse bottom.scottie
rabidrue1 is offline Find More Posts by rabidrue1
Reply With Quote
Old Sep 06, 2008, 03:44 PM
Registered User
Duxbury, MA
Joined Sep 2007
34 Posts
Thanks for the advice.

Some more done - fuse glued, used 1/8 sq and thin ca to re-enforce side to bottom joints - not much weight but more strength and stiffening.

New firewall epoxied in.
mikeyflight3 is offline Find More Posts by mikeyflight3
Reply With Quote
Old Sep 07, 2008, 07:17 AM
Blueplaidcanard flyer
sdy. ny
Joined May 2007
2,972 Posts
Try what I did,use the left over fuse side and bottom pieces and make a cowl for the motor.I used 1/4sq balsa in the corners so I could round it to a 1 3/4" spinner,the cowl on mine is held on with a 1" wide strip of the fuse covering so I can peel it off if needed.
rabidrue1 is offline Find More Posts by rabidrue1
Reply With Quote
Old Sep 07, 2008, 09:10 AM
Registered User
Seahag721's Avatar
Joined Sep 2007
38 Posts
Hey Mikey, I noticed your motor mount seems flush with the firewall, are you using spacers to get your right & down thrust angles or did you cut the fuse to the proper angles. Any advice on which way is better? Your pics are great, so please keep'em coming
Seahag721 is offline Find More Posts by Seahag721
Reply With Quote
Old Sep 07, 2008, 10:21 AM
Registered User
Duxbury, MA
Joined Sep 2007
34 Posts
Installed the firewall with 4 deg downthrust, no right but will use washers if necessary.
mikeyflight3 is offline Find More Posts by mikeyflight3
Reply With Quote
Old Sep 11, 2008, 09:40 PM
Registered User
Duxbury, MA
Joined Sep 2007
34 Posts
Some more work:

made hatch for battery compartment and hatch/cowl combo for esc compartment. Rough shaping until spinner and prop arrive tomorrow.
mikeyflight3 is offline Find More Posts by mikeyflight3
Reply With Quote
Old Sep 11, 2008, 09:48 PM
The Lone Blue Plaid Flyer
Bob Cook's Avatar
Seattle
Joined Jan 2003
7,567 Posts
Looks very nice. Keep on gluing !!!

Bob in Seattle
Bob Cook is offline Find More Posts by Bob Cook
RCG Plus Member
Reply With Quote
Old Sep 12, 2008, 04:43 AM
Blueplaidcanard flyer
sdy. ny
Joined May 2007
2,972 Posts
Nice work on the hatch/cowl,should look real fine when it's shaved down to the spinner contour.
rabidrue1 is offline Find More Posts by rabidrue1
Reply With Quote
Old Sep 13, 2008, 12:12 PM
Registered User
Joined Apr 2006
1,906 Posts
I gather your motor choice doesn't have a reversible prop shaft to allow direct bolting to the inside of a firewall?

R/E
rud-elev is offline Find More Posts by rud-elev
Reply With Quote
Old Sep 13, 2008, 05:29 PM
The Lone Blue Plaid Flyer
Bob Cook's Avatar
Seattle
Joined Jan 2003
7,567 Posts
Hi R/E,

I thought that too, but maybe he did that for CG ???

Bob in Seattle
Bob Cook is offline Find More Posts by Bob Cook
RCG Plus Member
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Build Log Sig Riser 100" Build RC-JG Thermal 92 Dec 17, 2008 04:30 AM
Build Log Sig Riser 100 build jwhitacre Sailplane Talk 18 Jul 27, 2008 05:40 PM
Sig Riser 100 chris dodge Electric Sailplanes 9 Apr 09, 2008 06:21 AM
Sig Riser 100 electric conversion John Gallagher Electric Sailplanes 9 Apr 07, 2004 11:17 PM
Sig Riser 100 NIB soar-iowa Aircraft - Electric - Airplanes (FS/W) 0 Feb 12, 2002 09:09 AM