Boomerang Sprint repair - RCCanada - Canada Radio Controlled Hobby Forum
RCCanada - Canada's Radio Control Hobby Forum
Jet Aircraft Discuss Jets in Canada

Reply
 
Thread Tools Display Modes
Old 07-14-2016, 10:02 AM   #1
stegl
RCC Supreme Contributor
 
I am: Len S
Join Date: Mar 2009
Location: Kelowna
Radio of choice:
Jeti DS16 just need one radio as it does it all but still use my Airtronics SD10.
# of RCs: 10

Feedback: 28 / 100%
Posts: 3,062
Total Props: 20
Boomerang Sprint repair


       Remove this ad - become a site supporter!
At the last Princeton Spring Jet rally , I unceremoniously removed my front nose gear on my Sprint. Gathered up the pieces in a bag so as to have something to work with for patern copies. After getting home , found a few weak spots , at least what I thought , in the arf assembly . Reused the retract mounting rails but recut the rail front and rear mounting bulkheads plus side supports and glued together as one piece. The original side triangles supports had been cut out out for weight saving at a loss of strength support ; which I left solid as was only 1/8th lite ply. Then after set I clamped that into the aircraft nose. Pictures to follow...... Looks pretty gross at first
On the second picture you can see the full 1/8th ply and minimal holes in the bulkheads.
Attached Thumbnails
Click image for larger version

Name:	glueing gear platform on sprint.JPG
Views:	78
Size:	69.3 KB
ID:	1003417   Click image for larger version

Name:	glueing gear platform into Sprint.JPG
Views:	67
Size:	69.5 KB
ID:	1003425  

Last edited by stegl; 07-14-2016 at 12:12 PM. Reason: add photos
stegl is offline   Quick reply to this message.

Sponsored Links - Subscribe to remove this ad.
Old 07-14-2016, 11:09 AM   #2
mebeflyin
RCC Contributor
 
I am: mark u
Join Date: May 2013
Location: ontario
Radio of choice:
jr 9503
# of RCs: 25

Feedback: 1 / 100%
Posts: 271
Total Props: 0
Re: Boomerang Sprint repair

there is no way on earth that yours could look worse then blairs. his sprint has multiple layers of ply slapped on everywhere from all the whackings it has suffered and that dam thing just keeps on flying.
mebeflyin is offline   Quick reply to this message.
Old 07-14-2016, 12:15 PM   #3
stegl
RCC Supreme Contributor
 
I am: Len S
Join Date: Mar 2009
Location: Kelowna
Radio of choice:
Jeti DS16 just need one radio as it does it all but still use my Airtronics SD10.
# of RCs: 10

Feedback: 28 / 100%
Posts: 3,062
Total Props: 20
Re: Boomerang Sprint repair

Here is the next step. Sheeting done and the edging for screwing down plate
for nose gear cover. Used a cut-off saw to trim all nose overhang but didn't get a picture of that.
Attached Thumbnails
Click image for larger version

Name:	sprint front lower wheelwell repair.JPG
Views:	66
Size:	65.2 KB
ID:	1003433  
stegl is offline   Quick reply to this message.
 
Old 07-14-2016, 12:21 PM   #4
stegl
RCC Supreme Contributor
 
I am: Len S
Join Date: Mar 2009
Location: Kelowna
Radio of choice:
Jeti DS16 just need one radio as it does it all but still use my Airtronics SD10.
# of RCs: 10

Feedback: 28 / 100%
Posts: 3,062
Total Props: 20
Re: Boomerang Sprint repair

Repaired front with a new slightly longer nosecone. Low points filled with finishing resin and micro balloons for easier sanding. Used an old plastic credit card for leveling to minimise sanding. Ready for glassing.
Attached Thumbnails
Click image for larger version

Name:	repaired sprint front.JPG
Views:	60
Size:	69.3 KB
ID:	1003441   Click image for larger version

Name:	repaired sprint front ready for glassing.JPG
Views:	53
Size:	65.9 KB
ID:	1003449  
stegl is offline   Quick reply to this message.
Old 07-14-2016, 12:29 PM   #5
stegl
RCC Supreme Contributor
 
I am: Len S
Join Date: Mar 2009
Location: Kelowna
Radio of choice:
Jeti DS16 just need one radio as it does it all but still use my Airtronics SD10.
# of RCs: 10

Feedback: 28 / 100%
Posts: 3,062
Total Props: 20
Re: Boomerang Sprint repair

Here is the glassed front with first prime and block sanded using wet/dry sandpaper and water. I found to clear the sandpaper ; I swished it in a container of water to remove the crap. I then wiped down the sanded area to get the crap off it. That way sanding worked much faster. This is the first time I have done it this way and works very much better. Hey, building for 40 years an still learning. Who says you can't teach an old dog, new tricks.....LOL
Attached Thumbnails
Click image for larger version

Name:	sprint lower front glassed and first prime.JPG
Views:	35
Size:	58.4 KB
ID:	1003457   Click image for larger version

Name:	sprint front glassed and first prime.JPG
Views:	39
Size:	66.1 KB
ID:	1003505  
stegl is offline   Quick reply to this message.
Old 07-14-2016, 12:35 PM   #6
stegl
RCC Supreme Contributor
 
I am: Len S
Join Date: Mar 2009
Location: Kelowna
Radio of choice:
Jeti DS16 just need one radio as it does it all but still use my Airtronics SD10.
# of RCs: 10

Feedback: 28 / 100%
Posts: 3,062
Total Props: 20
Re: Boomerang Sprint repair

Last, but not least, is the paint job....better than first time around.
the second picture is with standard nose length; the first is slightly longer.

Better or worse or no difference? Side shot of the fix might be better.
Attached Thumbnails
Click image for larger version

Name:	Sprint repaired front repainted.JPG
Views:	60
Size:	78.1 KB
ID:	1003513   Click image for larger version

Name:	Boomer Sprint after sucessful day.JPG
Views:	75
Size:	833.3 KB
ID:	1003553  

Last edited by stegl; 07-14-2016 at 12:48 PM.
stegl is offline   Quick reply to this message.
Old 07-15-2016, 01:02 AM   #7
Pauld
Level 3 Supporter
★ Site Supporter ★
 
Pauld's Avatar
 
I am: Paul D
Join Date: Apr 2005
Location: Coquitlam, B.C.
Radio of choice:
Fubar S-bus2 -no lock outs :)
# of RCs: 10+

Feedback: 10 / 100%
Posts: 2,557
Total Props: 23
Re: Boomerang Sprint repair

Glad to see you're getting it back together Len.

Cheers,

PaulD
__________________
Paulomite

http://www.jetpilots.org/
MAAC Jet Committee
IF IT'S TOO LOUD - YOU'RE TOO OLD!
2L club executive member
Pauld is offline   Quick reply to this message.
Old 07-15-2016, 01:08 AM   #8
stegl
RCC Supreme Contributor
 
I am: Len S
Join Date: Mar 2009
Location: Kelowna
Radio of choice:
Jeti DS16 just need one radio as it does it all but still use my Airtronics SD10.
# of RCs: 10

Feedback: 28 / 100%
Posts: 3,062
Total Props: 20
Re: Boomerang Sprint repair

Looked worse than it was . Repairs came together faster than first thought. Ready to boogie ! Just waiting to get my hands on a used Elan airframe .....
stegl is offline   Quick reply to this message.
Old 07-15-2016, 07:45 AM   #9
Max
Administrator
★ Site Supporter ★★ Administrator ★
 
Max's Avatar
 
I am: Max P.
Join Date: Feb 2007
Location: Aurora, Ontario
Radio of choice:
JR and Spektrum

Feedback: 21 / 100%
Posts: 13,845
Total Props: 154
Re: Boomerang Sprint repair

Looks good, Len. The repairs are hardly noticeable and looks much stronger now
__________________
RC Test Pilot; FPV Instructor, Airplane Instructor; Helicopter Instructor

My Aircraft Albums: http://www.rccanada.ca/rccforum/album.php?u=13173

Last Photo added: Dec 15; Warwing Foamy for FPV
Max is offline   Quick reply to this message.
Old 07-15-2016, 09:09 AM   #10
stegl
RCC Supreme Contributor
 
I am: Len S
Join Date: Mar 2009
Location: Kelowna
Radio of choice:
Jeti DS16 just need one radio as it does it all but still use my Airtronics SD10.
# of RCs: 10

Feedback: 28 / 100%
Posts: 3,062
Total Props: 20
Re: Boomerang Sprint repair

Wish they had this one available in a real kit as I could build better than where they get them built. Plug in wing tips are not bad but the tailbooms suffer as the glue joints are poor and some of the wood stringers , poor quality balsa. A little use of CF would have gone a long way. Also as a kit ,shipping costs could come way down. Beginning to think that they may be concerned that scratch builders might just get in and try to make copies of an excellent airframe ....just my thoughts.

Will have to do a rebalance as , I threw out about 3 oz of weight out of the front.

Last edited by stegl; 07-15-2016 at 09:14 AM.
stegl is offline   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:
Your Name
Your first name and last initial is required if you plan on using the forum.
Location
Which city & province you live in. This is mandatory for classified listings.
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

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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 05:20 PM.


vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.