I just received the DYNAMO kits from Italy and I will be building one. I thought I would start a build thread on it.

The Dynamo is designed and built entirely by ARG in Italy to provide a good quality, full composite aerobatic jet trainer.
It is also very agile and a good advanced every day fun model. It is fully short grass field capable.

The fibreglass and wood are of very high quality and the formers are glued accurately and with proper glue joints, typical of European manufacturers.

Special attention was made to the flying surfaces profiles and composite construction.
The jet is very light, with a low wing loading of just 170 gr/dm2, that allows a takeoff from asphalt and from grass within 30 meters (100ft).

The Dynamo is designed to use 80~100N platforms.

The Dynamo is the perfect choice to become part of this wonderful world of RC Jet flying.

Technical Characteristics:

Wing Span: 1,999 mm (79")
Wing Span with Winglets (included in the kit at no extra charge): 2,340 mm (92")
Length: 2,180 mm (86")
Wing Area: 56.1 dm2 (without winglets) – 63.3 dm2 (with winglets)
Empty weight: 9.3 Kgs (20.5lbs) dry
Flying weight: 11Kgs (24lbs)
Wing Loading: 170 Gr/dm2 (with winglets)
Suggested Turbine: Min 60 N – Max 100 N
Speed range: from 30 Km/h to max 250 Km/h

I will be using the Merlin 100. I have also made 3 retract sets for it, one based on Behotec C36/2 Air, C36/2 Electric or Electron ER40

Here are a couple of pictures.
Will start the build this weekend and update as I go along.

Thanks for starting your build thread on the Dynamo. I almost bought one also, but decided on the Ultimatun sport jet which is similar to yours. It is made in Spain by Jets Models Factory. I have a Jetcat P90 which I plan to use. Good luck with your build.
Steve

Nice looking jet like a futura and a turbinator decided to mate.. Any pics with the winglets on?

Did not get a chance to update yesterday, so here it is.
The Aileron and retracts skins need to be cut, they are marked so it is very easy to do and only takes few minutes. You need to also cut a 40x20mm hatch to access the Flap servo area.
Next install the flap servo, control arms then retracts.
Will update again soon.

Peter, can you post a pic on how you mount the winglets? Thanks.

Sure, will take some this afternoon.

JPHen
I sell the kits with both wing tip options.
You have to sand both ends and glue with Hysol, clean the butting surface with alcohol, tape it and let it cure.
Pics below.

Just took mine out of the box! Very nice mold, will beging assembly soon. I have read the manual a couple times to become familiar with assembly. However, seems like a lot more parts come with the plane then shown in manual. I am sure though it will be self explanatory. Thank you Peter for starting this thread. Can you send measurements from trailing edge to start of the 40x20mm hole in root rib for flap servo?

I will.
I am working on the retracts as well for you
Regards

Great thanks!

Peter was just checking to see if you were able to get the measurement for the 40 x 20mm whole?
I have cut out all servo panels and retracts, and just have flaps left.
wing tips are being glued in AM.
I decided to get aftermarket servo mounts.

I notice your retract skin was cut straight across the little depression for struts. (Triangle shape depression.). I am assuming that was done because of the struts you choose. I also left mine straight across, but am not sure how the Bio struts are? Should I make that cut?

Sorry Behotec struts not Bio.

You can cut the access hatch approx. 245mm from the leading edge, also the 40mm x 20mm is an approximate dimension.
It is not really too crucial to be exact here with dimensions since this is an access hatch only and will be used as an exit hatch for the leads as well.

I left the strut cutout straight on purpose, i have been testing which struts to use. They all fit and might require a slightly different cutout that's the reason I did not cut it. As it turns out the Behotec will be too heavy duty for this plane, the plane is lite and the struts will require too much weight to compress or a very heavy landing.

Electron struts as well as JetsMunt struts will work better, and they will be cheaper for the end user.

As a result, I have ordered the JetsMunt struts and as soon as they are here I will post some pictures.The Electron retract units fit perfectly and the mount is pre-drilled for them. Blind nuts and screws are supplied with the kit as well to bolt the Electrons down.

Also note that the stabs are thin and it might be a small challenge to fit the standard size servos in there, but it is possible.
I opted to use MKS 6125, these are high quality high torque servos delivering 8Kgs cm at 6V, or 111 oz in. Savox SA-1256TG or SA-1258TG will fit there as well.

I had gotten the JR DS398HV which has is 1.14in x .433in x 1.18in
which is basically the same dimensions. They produce 75oz-in of torque.
will that be enough torque?

thanks for the 245mm measurement

For the Stab, ARG suggested Graupner DS3288 which has 76N cm of Torque @ 6V or 107ozin
JR DS398HV delivers as you say 75 oz-in BUT at 7.4V, this is a low torque for the stabs.
Will you be running HV servos throughout? If not then you will need 7.4V supply for the stabs only? Not the best solution I think.
Are you able to switch them?

Yes using JR 8411HV for all other surfaces. But will most like change to the MKS 6125.
both of the Savox servos listed above having width of 20 mm that will not work for the stabilizers.

Since I am planning on a 2 cell lipo should I get two of the SBEC 2V to run between the receiver and MKS 6125 servo? They are sold on the MKS website and seems to regulate voltage to the servos correct?

The template for the flap servo control arm does not appear to end up in the correct position. After placing servo in the wing rib, and template on wing. There was no way servo arm would hit it. Anyone else have this issue?

The 134mm from trailing edge and 116mm in from edge with cut out of 6mm centered from the 116mm mark and length of 50mm seems to hit the mark

will grommets on servo help?

Metals arms are usually higher too

Don't use their measurement.
They are using different servos.
Just measure it yourself.
I installed the servo with a short arm, rotated the arm until it dented the skin, then cut the slit.

ARG is using Graupner servos and although they have JR equivalent, a lot of them are not available in North America
Just use your own judgement.

Electron based retract set, wheels and brakes are finally done, should be a few days before I have all the parts in my hands. Should be a drop fit.

Great let me know when in and I will place the order. They look nice.

I ordered one of these today with the Electron retracts. Looking forward to a bit of a change from Moki driven warbirds.