build DB Mascot

[EarlyBird]

It has been a long time since I built a kit and the Mascot has been mentioned a view times on here, I thought I would kill two birds with one stone and therefore bought the kit from DB sport and scale.

 

 

 

This will be electric as I have the power train in stock. Upon opening the box I noticed the wing bands, which I don't like, so a few changes are going to be made to bring the design up to date with modern materials and methods. 

Would anyone else like to join in , please do as I do like to have company.

 

Steve

[Ron Gray]

Go for it Steve, I’ll be watching!

[kevin b]

I've got one I'm selling for somebody who doesn't fly any more.

It has been started so it isn' expensive.

Offers anybody ?

 

 

Edited February 9 by kevin b

[Tom Flynn 1]

Im very interested 

 

[dave parnham]

watching ......we learnt to fly on these 20 years ago when our instructors just handed us the Tx and then  walked off you knew you were solo and had to learn to land by yourself Happy days.

[Tim Kearsley]

I built the DB Mascot two or three years ago.  I think the only mod I made was to put a servo in each wing rather than the one central servo as per the plan.  I had many happy flights with it and was very sorry when it met its end in a mid-air collision!  The wing was totally unharmed (I still have it) but the fuz was a write-off.  I might build another fuselage in due course and put the wing back into service.

[David Holland 2]

Did DB ever design a bad model. I think not!!

[David Holland 2]

I have an urge to build another BiStormer but I need to thin out the hangar a bit first.

[Richard Wood]

20 hours ago, EarlyBird said:

It has been a long time since I built a kit and the Mascot has been mentioned a view times on here, I thought I would kill two birds with one stone and therefore bought the kit from DB sport and scale.

 

 

 

This will be electric as I have the power train in stock. Upon opening the box I noticed the wing bands, which I don't like, so a few changes are going to be made to bring the design up to date with modern materials and methods. 

Would anyone else like to join in , please do as I do like to have company.

 

Steve

I have one of these very nearly finished. Built as-is apart from changing to dual aileron servos built into the wing, top-hinged using the covering as the hinge.
Electric powered on a 4S setup.

Good complete kit. Enjoy it.
 

[Richard Ashworth]

I Always learn something from another persons build/ mod. Count me in.

[kevin b]

Kit on its way to a new owner.

From the same person I have "inherited" What I thought was a Precedent T240 kit.

It now turns out that there is one neraly built, but not covered kit. One complete new kit and a full set of laser cut parts for a third one !!!

Anybody interested ?

Hopefully that is the last of the surprises.

I must be a glutton for it. Next week I gave to go around to our ex club chairman's house and clear out his stuff !

[EarlyBird]

Thank you for the encouragement as a result of which I have retrieved the kit from the cupboard. Opening the box is a one-way Street as there is no way I can possibly not start building. First is to study the plan and then removing the laser cut parts from the sheets as supplied.

That's after making room to work. 

 

 

Yes I just pushed all of the rubbish back and got on with it. 🤣👍

 

Plan is on the building board and the first side is almost ready to build. 

 

How far has everybody else got? 

Pictures of your progress would be good. 

 

Steve

[EarlyBird]

Now that I am ready to start gluing the first thing to do is read the instructions, I didn't forget honest. 🤣

 

Steve

[Richard Wood]

Hi Steve,

Here are a few shots of the Mascot I've nearly finished. 
Needs a decent spinner, the U/C legs trimming & a few odds & sods sorting out. The last bits take ages!
Looking forward to getting this up.

 

 

[Richard Wood]

The noseleg coil is of course the wrong way round due to absent mindedness but it will have to stay that way now!
The U/C legs were clean and bright as supplied by DB but were stored in a damp garage for a while and need shining up.

Good luck with your kit.

[EarlyBird]

The kit is supplied as designed for i/c with a few modifications for electric. There are some changes I need to make to the formers and obviously these required decisions as for example where the ESC will be located and how the wing will be secured. Another decision required is how to maximize the battery access. Maybe too much thinking going on here as I was considering replacing all the balsa doublers on the fuselage sides with a single piece of 1/32 ply. 

 

Studying the plan it looks like there is built-in down thrust and an allowance for side thrust. 

 

All this thinking time is enabling me to continue repairing the vq giant stick.

 

Steve

[EarlyBird]

But 

I made a start by gluing the two halves of the fuselage sides together using the normal tape hinged method. Which involves removing the laser cut nibs and burnt wood first then apply a tape hinge and glue held flat with a weight. 

 

Steve

[Richard Wood]

If it helps, I eventually decided to locate the ESC behind the firewall on the plate shown in the pic. Hopefully a velcro fix will be secure enough.
The battery will go on the ply platform, secured in the usual way with velcro and straps.
The hatch is held in place with rubber bands anchored at the sides & the underside of the hatch, along with a couple of magnets.
The internal hole in the second former was opened out a little to accommodate the battery.

 

My kit was bought a few years ago and the plan & instructions may have been changed since.
 

 

 

[EarlyBird]

Thanks Richard, I usually place the ESC under the battery plate. The other option I have used before is to place it on the side of the fuselage. 🤔

 

With the two sides glued together I pinned them to the board so that they are parallel and transferred the guide lines across from the first to the second side.

 

Following the instructions we can now start adding the parts to the first side. 

 

Steve

[EarlyBird]

The first side complete 

 

Turn it over and place the second side back to back 

 

And add all of the parts to the second side and make them identical. Well that's what the instructions say make it sound easy. 

 

Steve

[Outrunner]

26 minutes ago, EarlyBird said:

The first side complete 

 

Turn it over and place the second side back to back 

 

And add all of the parts to the second side and make them identical. Well that's what the instructions say make it sound easy. 

 

Steve

 Don't make the two sides identical, you need a left and a right side! 

Nice kit.

[Tom Flynn 1]

Here are some pictures of my Mascot, which I  built from the DB plan last summer.

As you can see no canopy, so the old fashioned way. Also when originally built it was a tail dragger, mainly as I had an

old Acro Wot undercarriage spare, but it didn’t look right, so I changed it while renovating it.

Its original first flight was perfect. Next flight it left the ground and went vertical then sharp to the right and back into the ground.

After the repair I had a few more incidents of it doing the same, so I put a smaller engine in, added more right and down thrust.

It flew and I was happy, but after several minor bangs it looked tatty, So I stripped and rebuilt the front of the fuselage, plus I did away with the elastic bands by using the pegs and wing bolts.

I’m now sat Waiting for some heat to arrive so I can fly it again.

[EarlyBird]

Excellent Tom.

[EarlyBird]

Now we have two sides a left and a right. 

 

Did someone mention my favorites subject that is right thrust and also down thrust. I have measured and calculated the thrust lines on the plan and to the best that I can work it out they are both two degrees which would not surprise me so that is what I am going to build in. 

 

In comparison to my previous builds I do believe that this is going to be a relatively heavy model and I was wondering is this because it's an IC design whereas electric designs do tend to be lighter and if this is the case how to reduce the weight. One first way is to use smaller servos than the ones shown on the plan. The sheeting on the fuselage is a lot thicker than I am used to and I was wondering if I could reduce the weight behind the wing without affecting the strength.🤔

 

Steve

[John Rickett 102]

Its looking good Steve. The design is sound and will fly well, there’s not much point in reducing wood thicknesses, though being careful with the finish will pay dividends.

You could certainly save weight with modern servos, a Futaba S148 which would have been a standard fit at the time has a torque of 3.0 kg-cm (at 6v). The current Hitec HS-81 has a similar torque and weighs 16.6 gm compared to the Futaba at 45.4 gm.

I’d advise not to skimp on cheap servos but if you look for ones rated at 3.0 kg-cm, they will do the job and save a considerable amount of weight. Just make sure when fitting out that everything is as far forward as possible, you’re unlikely to end up with a model with a too-far-forward cg.