BEAVER DH C2 no 2 30 IN RUBBER DUMAS KIT 306 Nov 25 2025 to PRESENT

[Lastwoodsman]

Try building a motor like I did in Pic #1   Reply # 118,  and then get back to me.

[Lastwoodsman]

BEAVER DH C2   30 INCH RUBBER POWERED  FREE FLIGHT PARK FLYER   DUMAS KIT 306

Sun Feb 22 2026

Reply #121

     Well,  there are no test glides now.   It snowed overnight and got cold again.   It is still winter and the forecast is not good.

     I did make it to our local Canadian Aviation Museum yesterday,  and I brought in the  30" Beaver to show the boys.

     The beaver is now ready to test glide without the spinner.   I now have two rolled out,  5.3 and 5.1  gram slabs,  of clay ballast weight on top of the nose.   I can always remove the top slab and stick it inside the front cowl bottom,  once I get it trimmed,  and leave the bottom slab on top of the cowl for the sun glare.

Pic #1     WEATHER FORECAST  830 AM SUNDAY FEB 22 2026  TO THUR FEB 26 2026

Pic #2     1677     Jackson Park after the snow.

Pic #3     1675     There is another hunk of clay on the cowl,  to replace the weight of the spinner for the test glides.

Last woodsman
Richard

[Lastwoodsman]

BEAVER DH C2  30 INCH RUBBER POWERED  FREE FLIGHT PARK FLYER  DUMAS KIT 306

Tue Feb 24 2026    post  1 of 3

Reply #122

New Six Inch Four Strand 1/8" Motor

    Well,  I have been sulking around with this return to the cold temps and cabin fever  (  minus 9 deg C  or  16 deg F  this AM ).  I keep thinking about the rubber motors,  since I still have the table stooge blocked up and ready to load up the Beaver for more motor testing.    Not braided motors any more,  thanks anyways.

    Back to trimming thoughts.  I need a tight motor for the entire motor run.    The prop hook to rear peg is seven inches.    The rubber motor has to be substantially smaller,  more like  six inches,  in order to hold that rubber motor tight enough,  throughout the entire motor run  ie -  no loose noseblock rattling around at the end of the prop run.  To this effect,  I never really did try one of these  "tighter"  motors using four strands of  1/8"  rubber (total width cross section of four strands =  0.500" total ).    My notes say that the  1/8"  motor was not a very strong of a pull.    Let's try a new one anyways to be sure. 

Six Inch Four Strand 1/8" Motor

Pic #1    1709    Two lengths of rubber are now cut for the new motor,  leaving about one inch extra for tying off the knot.    I always use a  'reef knot', plus one extra third knot.

Pic #2    1716    Having the same  " length"  after tying up the knot is critical.

Pic #3    1719    The extra rubber is cut off,  and three strings are ready.

    Well,  it was necessary to take exacting care when trying to make a four strand rubber motor to an exact six inch length.  We need the longest motor possible,  using the perfect amount of cross section of rubber,  and pull tension,  in order to go ahead with the trimming/test glides.

Lastwoodsman
Richard
cont

[Lastwoodsman]

BEAVER DH C2  30 INCH RUBBER POWERED  FREE FLIGHT PARK FLYER  DUMAS KIT 306

Tue Feb 24 2026   post 2 of 3

Reply #123

New Six Inch Four Strand 1/8" Motor

Pic #1    1722    The rear knot at zero,  goes around the rear peg,  and the prop wire hook goes by the six inch knot.    I try to space these knots out,  so they don't bunch up.

Pic #2    1725    The extra string is cut off,  leaving the long string to lower the motor into the fuse.

Pic #3    1728    Here is the tension on the newly completed motor.    We still have  3/4"  of pull left,  so it should still work.

Lastwoodsman
Richard
cont

[Lastwoodsman]

BEAVER DH C2  30 INCH RUBBER POWERED  FREE FLIGHT PARK FLYER  DUMAS KIT 306

Tue Feb 24 2026  post 3 of 3

Reply #124

New Six Inch Four Strand 1/8" Motor

Pic #1    1729    This is a comparison of the length of the new motor going in,  compared to the old motor coming out.    It looks like the same stretch,  so it should be a tight motor.

Pic #2    1734    And the spinning motor blows the tissue strips back (just under the spool of string).  The 1/8"  motor fits well and tight,  but does not have as much power as the 4 strand  two strand 3/16"  two strand  3/32" ,  motor.   

Pic #3    1739    The updated big board of motors.

    I think I will leave the weaker (but not by much)  1/8"  motor in the Beaver for the test glides to start ....  maybe Sunday  -  the weather forecast in the meantime looks bleak,  and see if it has enough power in the first place to hold level flight ....

     The end of the new  6" motor.

Lastwoodsman
Richard

[OZPAF]

Try building a motor like I did in Pic #1   Reply # 118,  and then get back to me.

Hi Richard. I don't have any 3/16 rubber but here is a pic. of the Elf motor - 4 strands of 0.055" rubber around 20" long unbraided, and around 6" braided.

It does need a bobbin or sliding tube at the hanger end and a wire ring or equivalent at the prop end.

I use a plastic straw reinforced with masking tape for a bobbin and a small ring made from a section of a paper clip and heat shrink, at the prop end.

It shrinks to the prop - hanger length in the model after the first wind.

The ring and the bobbin are the secret to making it work.

[calgoddard]

Richard -

What is the weight of your Beaver in its form shown in picture #3 of Rely  121?

[Lastwoodsman]

BEAVER DH C2   30 INCH RUBBER POWERED  FREE FLIGHT PARK FLYER   DUMAS KIT 306

Tue Feb 24 2026

Reply #127

     John, that is not the same braided motor,  that I am talking about.   Why are you posting a pic of a completely different rubber motor?

      So,  I am not talking about braided motors any more.     I don't have rings or bobbins or slip sliding  flanged tubes, etc,  and none were supplied in the kit,  and I am surely not driving all over town,  or ordering parts in the mail,  to get these parts.   It has all been a big waste of time. 

    It is too difficult to handle the tightness -  especially the  3/32"  rubber  -  of the the stretched braided rubber motor,  with out all of those things,  was  MY  point.       I am just going to have fun with regular motors.

     I'll reiterate once more ....    this is only a short flight small park scale looking flyer,  that I can have fun trimming out,   and not a long distance duration model.   I will be happy  if I can trim it out,  with  10  second circle flights,  and just flying it for fun over and over,  in the Cricket Field,  130 yards by 110 yards slight oval.    I am just hoping for good in-flight pictures of a pretty,  bush wheeled Beaver,  with the green scenery of full grown model eating park trees encircling the pitch.   

     The All Up Weight  AUW,  including prop and motor (not including the 5.3g spinner),  and including the two thin slabs of grey clay ballast weight on the cowl,  each weighing  5.3 g and 5.1 g respectively.   AUW  is about  93.8 grams including the  10.4 g  of ballast clay.

Lastwoodsman
Richard

[calgoddard]

Richard -

Thanks for posting the weight of your Beaver and for explaining your limited flight duration objective due to the relative smallness of your outdoor flying site. It will be great if you are able to obtain the in-flight pictures of your model that you are hoping for.

[Lastwoodsman]

BEAVER DH C2  30 INCH RUBBER POWERED  FREE FLIGHT PARK FLYER  DUMAS KIT 306

Thur Feb 26 2026

Reply #129

    I only estimated the AUW  at  93.8g  just by standing the model up on the scale trying to hold it straight,  so I took off the table stooge and weighed the plane properly,  and did a final balance check.

  Total AUW is  92.79 grams.

Pic #1    1743    I got out the scale to weigh it properly,  ie  pull the cowl off ....

Pic #2    1740    Fuse  68.55g

Pic #3    1741    Cowl plus prop assy  24.24g

Total    92.78g

Lastwoodsman
Richard

[Lastwoodsman]

BEAVER DH C2  30 INCH RUBBER POWERED  FREE FLIGHT PARK FLYER  DUMAS KIT 306

Thur Feb 26 2026

Reply #130

Pic #1    1745    Prop assy  (no cowl)  6.17g

Pic #2    1746    Rubber Motor  4 strand 1/8"  2.34g

Pic #3    1748    Final balance check.  Good to go!

Pic #4    WEATHER FORECAST  SIX DAYS STARTING THUR FEB 26 2026

    It looks like tomorrow,  Friday Feb 26,  is the only good day for test glides,  and then it really cools off again.

    I must walk out to the Cricket Field later today,  and see how hard the ground is for my winding stooge.

    Just learned this on my accordion!  'KATIUSHA'  Great magnificent orchestral,  and choir accompaniment,  music! ,  to listen to and model by ...  plus lyrics in English  and 'transliteration'  lyrics -  another war time song about a girl longing for her true love
https://www.youtube.com/watch?v=WNIlyUmSlDs

Lastwoodsman
Richard

[Lastwoodsman]

BEAVER DH C2   30 INCH RUBBER POWERED  FREE FLIGHT PARK FLYER   DUMAS KIT 306

Thur Feb 26 2026

Reply #131

Flight Report #1

     I went out to the Cricket Field to see how the grass and ground was.   And I was just only going to practice staking out the winding stooge.    At the last second before leaving I brought everything including the Beaver.

11:16 AM  a frigid finger freezing temp in full sunlight and low wind in Jackson Park Windsor, Ontario, Canada.   The temp was 27 deg F  48% humidity,  and  6  mph wind from the WSW gusting to 9 mph.

     These are pics walking through the park and past the Spitfire and Hurricane replica war planes,  to the Cricket Field.   The grass is barely unfrozen,  and has not been warm enough yet to bring on some growth.    I had to search for the best spots that had the most grass to inspect.     But it is going up to  50 deg F tomorrow ....

      There was a couple of places where I tried five glide tosses in total.    I did not take any real chances,  and I didn't really get it going fast or far enough,  to tell anything  yet.    On the fifth glide -  they all seemed to go sort of ok -  I lost the right hubcap and the right bushwheel also fell off (can't lose the color of that bushheel),  and I have lots of clear hubcap discs to epoxy glue all of them on now.

Pic #1     1749     This is the start of our walk through Jackson park to the Cricket Field.   There are no swollen buds on the trees yet.

Pic #2     1750     The backpack is full of everything for flying,  except the actual  10:1  Winder.

Pic #3     1751     Blue skies and bare limbs.

Pic #4     1752     The squirrels are about.   I had peanuts ....

Lastwoodsman
Richard
cont

[Lastwoodsman]

BEAVER DH C2  30 INCH RUBBER POWERED  FREE FLIGHT PARK FLYER  DUMAS KIT 306

Thur Feb 26 2026

Reply #132

Flight Report #1

Pic #1    1753    Head on pic of the Beaver

Pic #2    1754    Three more squirrels

Pic #3    1755    Wind on the flag at the Spitfire and Hurricane

Pic #4    1756    Another pic at the flag

Lastwoodsman
Richard
cont

[Lastwoodsman]

BEAVER DH C2   30 INCH RUBBER POWERED  FREE FLIGHT PARK FLYER   DUMAS KIT 306

Thur Feb 26 2026

Reply #133

Flight Report #1

Pic #1    1757     Another pic of the wind on the flag.

Pic #2     1758     In the distance is the Cricket Field.

Pic #3     1759     The Beaver is on the ground of the Cricket Field.

Pic #4     1760     There are big Spruce tree model eaters in the background.

Lastwoodsman
Richard
cont

[Lastwoodsman]

BEAVER DH C2   30 INCH RUBBER POWERED  FREE FLIGHT PARK FLYER   DUMAS KIT 306

Thur Feb 26 2026

Reply #134

Flight Report #1

     Here are some views of my whole flying field.   We will see if it greens up tomorrow with the high temp of  50 deg F  ( 10 deg C ),  expected.

Pic #1     1761     Looking towards the North towards the Spit and Hurri.

Pic #2     1762     Looking Northwest.

Pic #3     1763     Looking West.

Pic #4     1764     Looking  North Northeast.

Lastwoodsman
Richard
cont