Freewing F14 Tomcat twin 80mm EDF build by 4stripes - Page 4 - RCCanada - Canada Radio Controlled Hobby Forum
RCCanada - Canada's Radio Control Hobby Forum
Electric Jets Discuss electric jets in Canada.

Reply
 
Thread Tools Display Modes
Old 11-01-2019, 07:58 AM   #31
SARPLT
RCC Contributor
 
SARPLT's Avatar
 
I am: MartyZ
Join Date: Jan 2013
Location: Brighton ON
Radio of choice:
Spectrum
# of RCs: 8

Feedback: 8 / 100%
Posts: 423
Total Props: 1
Re: Freewing F14 Tomcat twin 80mm EDF build by 4stripes


       Remove this ad - become a site supporter!
Ok thanks. I managed to get the main gear mounts finished. I cut the soft foam behind each mount and replaced it with some pink foam. Rather than running a CF rod through the mount I decided to reinforce it from the top. After probing around with a pin to find where the plastic plate stops I cut a slot with a foam cutter from the spar reward past the gear area and about an inch down into the plastic gear mount. I like to use the foam cutter as it leaves a plasticized edge from the melting process which is actually stronger then the foam. With the hole cut I then installed a piece of ply into the area. This way any twisting for or aft forces will be taken in the fuselage side rather than just in the foam area around the mount.

In and effort to see what kind of foam support was around the nose gear mount, I removed the thin paper plate under the canopy hatch and to my amazement the fuselage was not even joined. There was almost a 1/4 inch gap in the fuselage halves. This is why there was a lot flexing in this area. I was going to squeeze them together and glue but then the width is too narrow for the canopy hatch to fit. I guess I will add some foam to the gap and then install a thin piece of ply on top to strengthen it all together.

Sorry for hijacking your thread Eric but I figured we should keep all the Tomcat issues and mods in one thread as there seems to be many.

Marty
Attached Thumbnails
Click image for larger version

Name:	SDC19665.JPG
Views:	55
Size:	357.6 KB
ID:	1650135   Click image for larger version

Name:	SDC19666.JPG
Views:	35
Size:	374.6 KB
ID:	1650137   Click image for larger version

Name:	SDC19667.JPG
Views:	34
Size:	378.2 KB
ID:	1650139   Click image for larger version

Name:	SDC19668.JPG
Views:	29
Size:	372.8 KB
ID:	1650141  

Click image for larger version

Name:	SDC19669.JPG
Views:	36
Size:	373.3 KB
ID:	1650143   Click image for larger version

Name:	SDC19671.JPG
Views:	32
Size:	371.9 KB
ID:	1650145   Click image for larger version

Name:	SDC19670.JPG
Views:	32
Size:	372.6 KB
ID:	1650147  
SARPLT is offline   Quick reply to this message.

Sponsored Links - Subscribe to remove this ad.
Old 11-04-2019, 04:14 PM   #32
SARPLT
RCC Contributor
 
SARPLT's Avatar
 
I am: MartyZ
Join Date: Jan 2013
Location: Brighton ON
Radio of choice:
Spectrum
# of RCs: 8

Feedback: 8 / 100%
Posts: 423
Total Props: 1
Re: Freewing F14 Tomcat twin 80mm EDF build by 4stripes

Decided to use the same method to strengthen the nose gear mount. I cut a slot through the top of the foam and glued two hardwood blocks down into each side of the plastic mount. With a plywood deck glued down on top of the blocks a solid structure is created.
Attached Thumbnails
Click image for larger version

Name:	SDC19672.JPG
Views:	24
Size:	370.5 KB
ID:	1650623   Click image for larger version

Name:	SDC19673.JPG
Views:	26
Size:	373.8 KB
ID:	1650625   Click image for larger version

Name:	SDC19674.JPG
Views:	25
Size:	375.5 KB
ID:	1650627   Click image for larger version

Name:	SDC19675.JPG
Views:	27
Size:	375.9 KB
ID:	1650629  

SARPLT is offline   Quick reply to this message.
Old 11-04-2019, 08:04 PM   #33
4stripes
RCC Supreme Contributor
 
4stripes's Avatar
 
I am: Flyboy 1
Join Date: Feb 2007
Location: Earth

Feedback: 19 / 100%
Posts: 2,370
Total Props: 11
Re: Freewing F14 Tomcat twin 80mm EDF build by 4stripes

Looking good!
So nice to work with foam (and wood).
__________________
Zen thinking * It's rebuildable till it fits back in the box. **
Cheers
4stripes is online now   Quick reply to this message.
 
Old 11-07-2019, 06:02 PM   #34
SARPLT
RCC Contributor
 
SARPLT's Avatar
 
I am: MartyZ
Join Date: Jan 2013
Location: Brighton ON
Radio of choice:
Spectrum
# of RCs: 8

Feedback: 8 / 100%
Posts: 423
Total Props: 1
Re: Freewing F14 Tomcat twin 80mm EDF build by 4stripes

Yes I do like working with foam. You can rebuild almost anything. Cut out the crumbled foam, add a new chunk, carve it, sand it, wipe it down with a bit of epoxy, fill it, prime it, paint it, better then new!

With everything on the Tomcat strengthen I figured it was a good opportunity to give it a fresh finish. So I ordered a new set of decals and then lightly sanded down the air frame. Any areas that showed any signs of flexing I wiped down with a very thin coat of epoxy on my finger just to harden the foam before applying a bit of filler to any dents. Once sanded, I applied drywall primer to the areas and lightly sanded again. After visiting my local Home Depot to match the paint perfectly, I am ready to give it a new finish.

Just in time because my new Freewing 1850kv fans came in.

Marty
Attached Thumbnails
Click image for larger version

Name:	SDC19682.JPG
Views:	30
Size:	379.7 KB
ID:	1650947   Click image for larger version

Name:	SDC19680.JPG
Views:	29
Size:	378.3 KB
ID:	1650949   Click image for larger version

Name:	SDC19681.JPG
Views:	26
Size:	372.9 KB
ID:	1650951  
SARPLT is offline   Quick reply to this message.
Old 11-08-2019, 07:36 AM   #35
Cougar429
Level 3 Supporter
★ Site Supporter ★
 
Cougar429's Avatar
 
I am: Gary L
Join Date: Aug 2008
Location: Tecumseh, Ontario

Feedback: 99 / 100%
Posts: 7,173
Total Props: 46
Re: Freewing F14 Tomcat twin 80mm EDF build by 4stripes

Will the new fan units give you longer flight times?
__________________
I know there's money in aviation........I put it there!
Cougar429 is offline   Quick reply to this message.
Old 11-08-2019, 01:57 PM   #36
4stripes
RCC Supreme Contributor
 
4stripes's Avatar
 
I am: Flyboy 1
Join Date: Feb 2007
Location: Earth

Feedback: 19 / 100%
Posts: 2,370
Total Props: 11
Re: Freewing F14 Tomcat twin 80mm EDF build by 4stripes

The fans draw more power. The flight times are completely dependent on throttle management. If you can resist the temptation to fly at high power for longer than necessary, the flight times should stay about the same.
The old saying holds true, you can’t get something for nothing.
__________________
Zen thinking * It's rebuildable till it fits back in the box. **
Cheers
4stripes is online now   Quick reply to this message.
Old 11-08-2019, 05:00 PM   #37
SARPLT
RCC Contributor
 
SARPLT's Avatar
 
I am: MartyZ
Join Date: Jan 2013
Location: Brighton ON
Radio of choice:
Spectrum
# of RCs: 8

Feedback: 8 / 100%
Posts: 423
Total Props: 1
Re: Freewing F14 Tomcat twin 80mm EDF build by 4stripes

I am very careful with throttle management on all my jets. Every vertical maneuver is followed by an idle or low throttle setting to allow the batteries to recover.

I ran the 1850kv fans up on the test stand and each are producing about 600gs+ more thrust then the stock fans but that comes at a cost of a higher amp draw at 89 compared to 69.
SARPLT is offline   Quick reply to this message.
Old 11-08-2019, 06:50 PM   #38
4stripes
RCC Supreme Contributor
 
4stripes's Avatar
 
I am: Flyboy 1
Join Date: Feb 2007
Location: Earth

Feedback: 19 / 100%
Posts: 2,370
Total Props: 11
Re: Freewing F14 Tomcat twin 80mm EDF build by 4stripes

Well worth the upgrade IMO. It will take off and climb better and you won’t have to take a long run before doing vertical maneuvers.
Now you can use those less powerful setups in an Avanti (or two) as it doesn’t need the setup it comes with to really perform.
__________________
Zen thinking * It's rebuildable till it fits back in the box. **
Cheers
4stripes is online now   Quick reply to this message.
Old 11-30-2019, 07:57 AM   #39
SARPLT
RCC Contributor
 
SARPLT's Avatar
 
I am: MartyZ
Join Date: Jan 2013
Location: Brighton ON
Radio of choice:
Spectrum
# of RCs: 8

Feedback: 8 / 100%
Posts: 423
Total Props: 1
Re: Freewing F14 Tomcat twin 80mm EDF build by 4stripes

I finally finished repainting the model. After putting a coat of latex primer on it I applied two coats of color paint. The first coat was an eggshell finish but it seemed a bit too flat so I went back to Home Depot to get the same color in Satin. The two coats actually smoothed out the foam alligator texture and only added a couple of ounces of weight. I will put the new decals on once I finish the reassembly. I have attached the paint code in case anyone needs touch up paint. It is a very close match.

When I disassembled the horizontal stab I noticed the aluminum shaft was also bent at one end so I ordered new ones as I did not want to take the chance of weakening it by straightening it out. The new Freewing all metal geared servos came in so these were installed. They work great with no slop and have lots of torque. If you order Freewing servos you have to be careful because the ones that are metal hybrid actually have metal and plastic gears. Kind of defeats the purpose.

When I ordered the higher performance 1850kv fans I decided to upgrade the ESC to 100 amp as these fans pull around 90 amps. In an effort to find a light weight ESC I saw the new V Good ESCs on Banggood so decided to try them. They are nice and small and easily handled the 90 amps for a 30 sec run on the test stand barely getting warm. For added safety I though I would cut off some of the plastic heat shrink for additional cooling and when I did that I found a nice heat sink already on them. The heat shrink actually holds the heat sink on the board so if you cut too much away you will have to glue them on. We will see how they hold up but for about $35CD for a light weight 100amp ESC they are worth a try. I may install them on all my smaller 80mm jets.

Marty
Attached Thumbnails
Click image for larger version

Name:	IMG_0485.JPG
Views:	24
Size:	107.7 KB
ID:	1653083   Click image for larger version

Name:	IMG_0481.JPG
Views:	24
Size:	106.7 KB
ID:	1653085   Click image for larger version

Name:	IMG_0491.JPG
Views:	20
Size:	128.0 KB
ID:	1653087   Click image for larger version

Name:	IMG_0480.JPG
Views:	23
Size:	96.7 KB
ID:	1653089  

Click image for larger version

Name:	IMG_0486.JPG
Views:	21
Size:	106.8 KB
ID:	1653091   Click image for larger version

Name:	IMG_0487.JPG
Views:	19
Size:	96.0 KB
ID:	1653093   Click image for larger version

Name:	IMG_0484.JPG
Views:	22
Size:	112.2 KB
ID:	1653095   Click image for larger version

Name:	IMG_0488.JPG
Views:	19
Size:	108.7 KB
ID:	1653097  

Click image for larger version

Name:	IMG_0489.JPG
Views:	25
Size:	135.3 KB
ID:	1653099  
SARPLT is offline   Quick reply to this message.
Old 11-30-2019, 04:27 PM   #40
4stripes
RCC Supreme Contributor
 
4stripes's Avatar
 
I am: Flyboy 1
Join Date: Feb 2007
Location: Earth

Feedback: 19 / 100%
Posts: 2,370
Total Props: 11
Re: Freewing F14 Tomcat twin 80mm EDF build by 4stripes

$35 dollar ESC’s might just warrant 2 or 3 full battery runs on the ground before risking the plane.
Good luck!
__________________
Zen thinking * It's rebuildable till it fits back in the box. **
Cheers
4stripes is online now   Quick reply to this message.
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the RCCanada - Canada Radio Controlled Hobby Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Member names may only be composed of alpha-numeric characters. (A-Z and 0-9)

!!ATTENTION ADVERTISERS!! If you intend on advertising anything on this forum, whatsoever, you are required to first contact us here . Additionally, we do NOT allow BUSINESS NAMES unless you are an Authorized Vendor. If you own a business, and want to do sales on this site via posting or private message, you will need to follow the rules. Shops, Stores, Distributors, Group Buys without being authorized will see your account terminated.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Radio of choice?
Which radio is your current favorite to use?
Number of RC Vehicles?
How many boats, cars, planes do you own?

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
vBulletin Message

Thread Tools
Display Modes

Forum Jump


All times are GMT -5. The time now is 01:04 PM.


vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.