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Jun 12, 2005, 11:41 PM
...missing the PE Slope Rebels
Flying Beagle's Avatar

HOB T-6 Texan 44” eConversion


I picked this kit up on sale at the LHS, and I plan to convert this to electric.
Beagle

House Of Balsa Kit #K24
SPECIFICATIONS
Wing span 44 in.
Wing area 319 sq. in.
Wt. with radio 2.5 to 3 lbs.
Wing loading 18-21 oz./sq. ft.
Fuselage length 29 in.
4 channel radio reqd.
Engine .15 to .19
Designed by R. Uravitch
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Jun 12, 2005, 11:44 PM
...missing the PE Slope Rebels
Flying Beagle's Avatar
But at a spec weight of 2.5 to 3 lbs (40 to 48 ozs) this Texan will need to lose some weight. I would like to see her get to less than 30 oz’s which would provide a lower wing loading at 13.5 oz/sqft.

The HOB instructions are very thorough, so I will skip the steps where I followed the plans. I will attempt to include all of my modifications to the kit as well as some pics of general progress along the way.

Beagle
Jun 12, 2005, 11:48 PM
...missing the PE Slope Rebels
Flying Beagle's Avatar
In the Instruction Manual, Step 1 involves prepping the 3/16” ply firewall for a .15 to .19 engine (on edge in pic), but this piece weighed 5/8 oz, so we need to go on the Atkins diet here and loose some carbs….

I sandwiched two 3/32 inch balsa sheets together cross grained and then bored an 1-1/2” hole in the middle for air flow into the fuselage, the new firewall weighed in at 1/8 oz….. Half an ounce saved on step 1 alone !!!

Beagle
Jun 12, 2005, 11:51 PM
...missing the PE Slope Rebels
Flying Beagle's Avatar
Step 4 has the fuselage side pieces CA’d together, the total weight of both sides is 2 oz

Note: I considered eliminating the 1/32” ply doublers, which would have saved half the weight, but the width of the fuselage would been affected.

Beagle
Jun 12, 2005, 11:53 PM
...missing the PE Slope Rebels
Flying Beagle's Avatar
Step 7 has the bulkheads marked prior to assembly, at this point I used a compass and drew different size circles, first drawn on the plans to get good spacing, then I transferred the circles over onto the inside of the fuselage side
Jun 12, 2005, 11:55 PM
...missing the PE Slope Rebels
Flying Beagle's Avatar
I drilled thru the center of each marked circle with a 1/8” drill, then used Forstener bits in my drill press to bore the holes from the good side, giving a cleaner cut
Jun 12, 2005, 11:56 PM
...missing the PE Slope Rebels
Flying Beagle's Avatar
Here’s the fuse sides after some serious “lipo-suction”, the sides weighed 1-3/8oz with the lightening holes for a total weight save of 5/8 oz
Jun 12, 2005, 11:58 PM
...missing the PE Slope Rebels
Flying Beagle's Avatar
Step 8 involves the fuse stiffeners, the plans call for 1/8 x 1 /4 stringers which I replaced with 1/8 x 1 /8
Estimated weight save 1/8 oz
Jun 12, 2005, 11:59 PM
...missing the PE Slope Rebels
Flying Beagle's Avatar
Steps 9, 10 & 11 involve notching out the bulkheads for a throttle servo linkage
Don’t have to do that……
Jun 13, 2005, 12:01 AM
...missing the PE Slope Rebels
Flying Beagle's Avatar
Step 12 However, I do have to alter the bulkheads to allow for battery access, I cut the tops off of the #2 & 3 bulkheads…… I’ll build the hatch later…
Jun 13, 2005, 12:02 AM
...missing the PE Slope Rebels
Flying Beagle's Avatar
After gluing the fuse sides together….., Steps 15, 16 & 17 preps the fuse for the cockpit floor, the plans call for 3/32 x 3” sheet, which I replaced with 1/16”….. estimated weight save of 1/8 oz
Jun 13, 2005, 12:04 AM
...missing the PE Slope Rebels
Flying Beagle's Avatar
Prior to Step 19, I bored small holes in each of the turtledeck bulkheads, about a 1/8 oz savings here……

sorry fuzzy pic..
Jun 13, 2005, 12:09 AM
...missing the PE Slope Rebels
Flying Beagle's Avatar
Step 23 Plans call for 1/16” sheeting, which I replaced with 1/32”…… I soaked the balsa sheets under the tap in the kitchen sink, then wrapped the sheets over the fuselage and held them in place with rubber bands overnight to dry…..

Beagle
Jun 13, 2005, 02:05 AM
Ay up it's warped
mtbrider's Avatar
Some interesting tips, i'm subscribed.
Jun 13, 2005, 08:59 AM
Registered User
BandDButton's Avatar
I'm buying into this one, I like some of your ideas for saving weight. I'll be interested in how she performes, and AUW.


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