Semi scale Mig-25 Foxbat, 70 mm - Page 3 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 01-22-2016, 06:10 AM   #21
ken park
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Re: Semi scale Mig-25 Foxbat, 70 mm


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Hey Ken, what happened to last years venue at Iroquois, too small?
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Old 01-22-2016, 09:13 AM   #22
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Re: Semi scale Mig-25 Foxbat, 70 mm

I noticed that Eric when I flipped the nose gear plate, I will make replacement ones out of 1/8' aircraft grade plywood. Wonder what size of screw they used, I would prefer a cap screw instead of those flat head screws.
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Old 01-22-2016, 10:01 AM   #23
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Re: Semi scale Mig-25 Foxbat, 70 mm

Shame that the retracts with metal trunions don't supply the opposite side mounting plates like the plastic trunion versions.
Here is the smaller size like your nose gear, and it come with the extra plate.
http://www.hobbyking.com/hobbyking/s...stem_1pc_.html
The larger size here
http://www.hobbyking.com/hobbyking/s...m_1pc_54g.html

The thing is, even these plastic trunion versions can be used as spare parts with your metal trunions. You just need to insert your metal trunions. The rest is the same.
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Old 01-22-2016, 11:33 PM   #24
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Re: Semi scale Mig-25 Foxbat, 70 mm

Finished shaping the forward nose section tonight. Then tackled the nose gear and retract installation. Fairly straight forward, had to make a plywood mounting plate for the retract mechanism itself. Then designed and epoxied the rails and plate that the retract gets bolted to. Should have blown the foam dust off the strut, looks dirty.

Here is the link too see the testing, http://youtu.be/f53NhHL6O88
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Old 01-23-2016, 07:13 PM   #25
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Re: Semi scale Mig-25 Foxbat, 70 mm

Because the very slender nose cone is quite delicate, it seemed I was hitting things every time I moved it. So, to toughen it up, finishing epoxy and 2.3 oz cloth was applied to the green foam radome section. Worked like a charm. Quickly block sanded it and applied a second coat of epoxy to fill in the cloth weave.

Just checked it epoxy, the needle like radome is very roust now, and the second coat of epoxy did the job nicel, it's high gloss now, so will sand it down with fine sandpaper and try and blend the area wher it stopped and the bare foam begins. Then I'll cover the rest of the forward section in the 3/4 oz cloth and water based urethane paint before attataching it to the rear main portion of the fuselage.

Must keep in mind that I have to build as light as possible, fairly big airframe for a single 70 mm.
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Last edited by Dutkoski; 01-24-2016 at 10:09 AM.
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Old 01-25-2016, 01:33 AM   #26
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Re: Semi scale Mig-25 Foxbat, 70 mm

The project is progressing, tonight, I epoxied the wings on, then determined how big to make the main access hatch. I like them big so it's easy to get inside. Also, determined where to put the main spar which I wanted to be at the rear of the access hatch. This way, the back of the main spar is epoxied to the fuselage as well.

Next will be the install of the main gear retracts and struts, tomorrow night. Once that is done, the twin vertical fins will be made and installed along with the full flying horizontal stabilizers.

The wings will have ailerons and flaps, like the real one.

Once at that stage, the forward section will get epoxied onto the main fuselage. Then the whole airframe will be balance by using the heavier items, ie: EDF unit, battery and ESC. After which, the EDF unit will get mounted inside.

The airframe, EDF unit and retracts tips the scales at 43 oz. so I will need to be careful of the weight. It's amazing how the weight sneaks up on you. Not too worried though, the EDF unit put out nearly 1200 watts of power installed in the Habu. The Mig has much bigger intakes so hope to get the same or better performance. Going to use the foam from the dollar store foam board to make sorta intake ducting.
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Old 01-25-2016, 03:05 AM   #27
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Re: Semi scale Mig-25 Foxbat, 70 mm

Looking great John!
Very nice project and build.
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Old 01-25-2016, 07:31 AM   #28
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Re: Semi scale Mig-25 Foxbat, 70 mm

Wow John the model looks great so far. You sure do nice work with foam. I would be interested in seeing your foam cutting setup. Have you decided on a paint scheme yet.

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Old 01-25-2016, 09:00 AM   #29
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Re: Semi scale Mig-25 Foxbat, 70 mm

Well, it's between the plain light grey scheme, or this neat bad boy business looking camouflage scheme.
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Old 01-25-2016, 09:08 AM   #30
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Re: Semi scale Mig-25 Foxbat, 70 mm

Keep it Pink!

PUTAN would love that!

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Well, it's between the plain light grey scheme, or this neat bad boy business looking camouflage scheme.
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