PDA

View Full Version : Crash rebuild



pittsdriver
09-14-2015, 08:57 AM
I'm just starting on a Cub rebuild. Unloaded the wreck last week and have been stripping it down and saving anything useful. This is going to be one hell of a Supercub when finished. Ordered a new Airframes Alaske 4" wide fuselage with all the options and a set of Dakota Cub extended wings with slats. Talking about putting a MT C/S prop on it. Tried to talk him into going experimental but keeping it certified. Should be a fun build and I'll ry and remember to take pictures along the way. Don

Cubus Maximus
09-14-2015, 01:47 PM
Something like the one I saw last Saturday morning? Pretty impressive off the water!

http://www.supercub.org/photopost/data/500/IMG_9313.jpg

pittsdriver
09-14-2015, 04:24 PM
Looks like what I'm going to build except it will have a two blade prop.

little wing
09-15-2015, 03:15 AM
Was worried it was the Green Hornet flown by Elaine in New Holstein this year. Had to look at pics I took to make sure it wasn't the same tail number, it isn't for anyone else thinking the same thing.

Congratulations, and good luck. Keep the build pics coming.

Steve Pierce
09-15-2015, 07:44 AM
I see you have built two Experimental kits. Will be interested to hear your thoughts on rebuilding an old airplane vs. building new from a kit when you are done. You are cheating though with a nice new fuselage and set of wings. ;)

pittsdriver
09-15-2015, 08:39 AM
Steve, This will be more like lifting the data plate off this one and putting it on the new one. Only big parts I'm using is the tail surfaces and the rest is all the hardware, controls and brakes. The Backcountry Supercub I built is an exact copy of the stock one so I'm real familiar with it. Now I have to deal with STCs, field approvals and a pile of paperwork. Don

Steve Pierce
09-15-2015, 08:57 AM
Now I have to deal with STCs, field approvals and a pile of paperwork. Don

That's the fun part. 8)

pittsdriver
09-15-2015, 10:47 AM
Now that I'm an A&P I'm learning how to fill out all this crap. I have a couple of good IA's that are helping me keep on the straight and narrow.

RaisedByWolves
09-15-2015, 11:49 PM
That's the fun part. 8)

Don't worry. He has a sick sense of fun.

Looks like a neat project, take lots of pics, and post often!

pittsdriver
10-16-2015, 09:01 AM
Got the Airframes Alaska fuselage this week and started adding parts. Should have lots of parts next week so things should progress fairly quickly. The workmanship on the fuselage is first class. Here is a pic of the old and new.

Steve Pierce
10-16-2015, 09:09 AM
Neat shipping fixture. I assume they had some get damaged in shipping.

tempdoug
10-16-2015, 09:26 AM
Cool, there sending out a free jig with every frame. Now everyone will have there own.

Bill Rusk
10-16-2015, 10:09 AM
Adam

Weight everything PLEASE. Lets see what the differences are. I have the weights from mine. It would be interesting to know the differences. Thank you

Bill

pittsdriver
01-19-2016, 12:23 AM
Been awhile but things are progressing well. All of the cockpit controls , Kydex interior panels, floorboards etc. are done and installed. Hung and rigged the wings last week and built all the control cables. I got the fuel tanks installed a couple weeks ago so I'm just about ready to cover. The stack of STCs and field approvals keeps growing. Got the Pro Pilot MT two blade prop STC the got the three blade field approved. Engine is going together at Lycon so should have it in a couple of weeks. One observation is the Airframes Alaska fuselage and Dakota Cub wings are very nice and a lot nicer that the stock Piper stuff but they are nowhere near as nice as the fuselage and wings that Javron puts out. Don

Crash
01-19-2016, 12:46 AM
You might consider the Wipline 2000 lb gross kit upgrade so you have some useful load. Looks like a 1300 lb Cub for sure....

Best wishes

Crash

mike mcs repair
01-19-2016, 12:51 AM
... Looks like a 1300 lb Cub for sure....

Best wishes

Crash
at first i was gonna think you were just being cranky....

but slotted wings and such, You are probably spot on as usual :-)

wireweinie
01-19-2016, 01:28 AM
Get all of your air frame wiring in place, now, while you can reach all the places it needs to be routed. Plan, ask questions, change your plans, and ask some more. Best advice I can give you on the wiring is to keep it as simple as possible and plan so as to keep all the wires as short as possible.

And listen to the guys above. They have about a hundred gazillion years of experience.

Web

pittsdriver
01-19-2016, 08:43 AM
Get all of your air frame wiring in place, now, while you can reach all the places it needs to be routed. Plan, ask questions, change your plans, and ask some more. Best advice I can give you on the wiring is to keep it as simple as possible and plan so as to keep all the wires as short as possible.

And listen to the guys above. They have about a hundred gazillion years of experience.

Web

Thanks for the good advice but this is not my first rodeo and I like simple wiring systems also. Actually about the 10th and 2nd Supercub. All the wiring is in the wings and all the rest is forward of the instrument panel. I do have the Wipaire 2000 lb GW STC, my Backcountry Cub is 2300 gross and 1250 empty. I agree it will probably be around 1250lbs but that's what the customer wants. Don

PA-22/20-160
01-19-2016, 09:24 AM
Thanks for the good advice but this is not my first rodeo and I like simple wiring systems also. Actually about the 10th and 2nd Supercub. All the wiring is in the wings and all the rest is forward of the instrument panel. I do have the Wipaire 2000 lb GW STC, my Backcountry Cub is 2300 gross and 1250 empty. I agree it will probably be around 1250lbs but that's what the customer wants. Don

I think you will be surprised at your weight prediction, there are several wide body Cubs with Dakota extended wings without the slats in my area and I'd say you're 100lbs light based on them. Nice plane either way.

chuck

DENNY
01-19-2016, 10:09 AM
I would also hang the flaps while the wings are up. Make sure they clear inboard. wiring for Position light on tail, Plan access for Trim position wire fairlead that is right behind extended baggage for when that wire brakes. Mine broke and had to drill out bunch of pop rivets in lower baggage to remove panel to rerun wire, screws in panel would have saved a lot of work. Just things you may already do that will help.
DENNY

pittsdriver
01-19-2016, 10:21 AM
I would also hang the flaps while the wings are up. Make sure they clear inboard. wiring for Position light on tail, Plan access for Trim position wire fairlead that is right behind extended baggage for when that wire brakes. Mine broke and had to drill out bunch of pop rivets in lower baggage to remove panel to rerun wire, screws in panel would have saved a lot of work. Just things you may already do that will help.
DENNY

All that done and done. Wings are rigged, flaps and aileron cables made and rigged and stops set, pitot system in, all wing wiring done, ELT mounted with antennae, all elevator and rudder cables in and adjusted with all cotter keys done. Don

pittsdriver
03-06-2016, 08:30 AM
Project is rolling along. Fuselage is covered and taped and ready for the spray coats. Tail surfaces are covered, stitched and I'll finish taping them today. Should see the engine from Lycon next week so I can get the cowl fit and the fuselage over to the paint shop.

Bill Rusk
03-06-2016, 02:26 PM
Very nice Don. You are really moving along. It should be very nice. I hope to see it sometime.

Bill

pittsdriver
03-06-2016, 07:12 PM
Thanks Bill, It won't be as light as yours but with the engine, prop and slotted wing it should be a hell of a performer. We have so many high lift mods on it we'll have to tie a string to it to keep it from floating up to the roof in the hangar. Don

pittsdriver
03-20-2016, 07:19 AM
The trend for Supercubs these days are extended gear with big tires. We decided to develop a new high speed stealth lowrider gear. Here is the prototype. We have Catto making us a 6 blade 50" diameter prop that will turn up to 4000 rpm. Should work I think. Don

ER Upgrade
03-20-2016, 08:34 AM
Nice work. And quick work too. I'm selfishly hoping you post interior photos of your Kydex interior when done.

ER Upgrade
03-20-2016, 08:39 AM
Great new gear too. If you weld a sharp blade across your gear axle, you can reduce the time to mow grass airstrips. Turn that into a "working" cub.

PerryB
03-20-2016, 09:01 AM
The trend for Supercubs these days are extended gear with big tires. We decided to develop a new high speed stealth lowrider gear. Here is the prototype. We have Catto making us a 6 blade 50" diameter prop that will turn up to 4000 rpm. Should work I think. Don

ComptonCub.

55-PA18A
03-20-2016, 01:50 PM
ComptonCub.

And hydraulic lifts that jump up and down while taxiing. Big speakers going "thumpa thumpa".

PerryB
03-20-2016, 04:08 PM
I was thinking he could modify a T3 tailwheel suspension with a hydraulic cylinder to make it hop.

pittsdriver
04-06-2016, 11:52 PM
Back to the real world. I have everything covered and taped except the wings. Fitting the firewall and boot cowl and we have the engine. Arie picked it up at Lycon last week and it looks great. I'm sure it will run as good as it looks. Don

PerryB
04-07-2016, 03:14 AM
The proper way to break in that engine is on an already flying airframe. I'll send you my address.

pittsdriver
04-07-2016, 08:32 AM
It's a tough job but I'm going to sacrifice a bunch of time and break in the engine myself. The owner told me we were doing so many mods on it that I had to do all the initial flights on it until I get any bugs worked out if there are any. I'm thinking it will probably take 25 hours or so and a few trips to Sulpher Creek and the B before it will be ready for him to fly it. :roll: Actually Lycon broke it in on the test stand so it should be good to go. Don

pittsdriver
06-12-2016, 12:22 AM
Well, the fabric is done ready for the spray coats. I mounted the engine and prop so I could fit the cowl so I can paint everything. Gives the Cub a whole new look. Don

DR-109
06-13-2016, 03:57 PM
I have a 4" wide body cub with Dakota Cub wings that I built up from nothing. I flew it for about six months on 31s and put it on wip2100a' s. I absolutely love the airplane. It looks like you are pretty far along but if you have any questions please feel free to contact me.
Ray Cook

pittsdriver
06-13-2016, 08:22 PM
Thanks Ray, Did you do the "0" thrust mod on yours?

DR-109
06-14-2016, 09:32 AM
I did not go with the thrust mod. I have a 160hp with an 82x44 prop. As it is by myself with half fuel I get off the water in about 6 seconds, with full fuel two people and gear I am still getting off in 10 to 11 seconds. I flew the airplane from southern Wisconsin to Florida and back and was getting about 100mph cruise. This was a pretty long flight so I think I got a pretty good guess on average speed. In my opinion with the wide body you don't need the mod.

Steve Pierce
06-14-2016, 09:36 AM
In my opinion with the wide body you don't need the mod.

Can you elaborate on this?

DR-109
06-14-2016, 10:55 AM
I talked to the Folks at Thrust line and they didn't have a definitive answer about the wide body performance so I didn't put it on. All I am saying is I am very happy with the performance I have.

flylowslow
06-14-2016, 12:08 PM
Ray, Did you win an award at OSH a few years ago? Did you have a Garmin 696 centered on your panel? You had a flush mount that was really clean.

Blue Skies,
Denny

DR-109
06-14-2016, 12:43 PM
Yes, I won a Grand Champion Contemporary at OSH and a Grand Champion Seaplane at Sun & Fun. The flush mount GPS is a Garmin 796.

pittsdriver
06-14-2016, 03:47 PM
Nice Ray!

pittsdriver
09-11-2016, 08:33 AM
Been awhile but I got the fabric and basic paint done so things are going back together permanently. I'll start building up the instrument panel next week. Don

wireweinie
09-11-2016, 12:12 PM
What's your plan with the panel? Are you thinking minimal or all the bells and whistles?

Web

pittsdriver
09-11-2016, 11:49 PM
It will have airspeed, altimeter and T&B steam gauges an EDM 830 for EMS and a Garmin G5 when it comes out. This is a certified Cub so have to stick with what's legal. Garmin GTR 200 COMM and Stratus ESG 1090 ADSB TX. Don

wireweinie
09-12-2016, 01:26 PM
Check out some of the Winters gauges at Wings & Wheels. I've installed several of their airspeeds and altimeters and have loved them. They are made for gliders so are extremely light weight and are in 3 1/8" and 2 1/4" sizes.

Also check out some of the smaller avionics like the Becker and Trig lines. You can get models that fit in a 2 1/4" instrument hole and not mount a tray in the panel.

Web

brekkeaerial
12-03-2016, 10:12 PM
I am building a wide body now. Just curious is the prop a Catto

pittsdriver
01-12-2017, 01:11 PM
I am building a wide body now. Just curious is the prop a Catto

This has a three blade MT MTV-9-3 constant speed prop.

pittsdriver
01-12-2017, 01:17 PM
Almost done. We're doing vinyl graphics so I haven't put the wings on until that is done. Here are a couple of pictures of it right now. The instrument panel has a Garmin G5 AH and a JPI EDM 830 EMS.

pittsdriver
04-26-2017, 11:41 AM
The Cub is done and flying. Came out a little heavy at 1280# but it has great performance. With the slotted wings it will fly level in the low 20's indicated with the stick back against the up stop. No real stall break or spin tendencies even when agrivated. The engine and prop combination works very well and has impressive take off and climb performance. What the slotted wing gives in slow speed performance it takes away on the top end. Cruise is 105 mph but like the owner says it is still 20-25 mph faster than with the fixed pitch prop. The vinyl trim came out great. With the new thin vinyls it looks just like paint and even the fabric weave shows through.

Steve Pierce
04-27-2017, 07:58 AM
I have not seen any loss on the top end of a Dakota slotted wing after changing wings from stock to slots on the same airframe with no other changes.

pittsdriver
04-27-2017, 08:19 AM
Any ideas Steve. I was disappointed with the top end. With this engine and prop combination it should run around 125 mph. Don

Steve Pierce
04-27-2017, 08:24 AM
SJ has 180 hp and the two blade MT with Sullivan extended wings and I have flown his airplane on 31's and 35s and I didn't get anything close to 125 mph. Maybe he will chime in here.

SJ
04-27-2017, 09:12 AM
Any ideas Steve. I was disappointed with the top end. With this engine and prop combination it should run around 125 mph. Don

Don,

I'm not sure my plane would go 125 if I pointed it straight down with full power! I get about 95mph with 31's.

My first supercub which was a stock airframe PA-18-105 (no flaps) and 135hp and cruise prop (no vg's, standard gear covered, etc) would go 120mph with 800 x 6 tires. When I put bushwheels, vgs, and uncovered extended gear on, it dropped to around 85.

Put on super small tires and see what she does!

sj

Bill Rusk
04-27-2017, 09:13 AM
Just my two cents.......I have flown a couple of CS prop Supercubs and they did not go but 5 (maybe 10 MPH) faster than a fixed pitch Cub. I think there is just so much drag in the airfoil, gear, tires, etc that the CS prop does not help much. Certainly not worth the cost in my OPINION. I was getting 110 MPH max. CS props are great on airplanes that are less draggy, i.e. RV's, Glassairs, Lancairs etc. not so much on Cubs. IMHO

Bill

pittsdriver
04-27-2017, 10:35 AM
That was with the small tires. Just put the 31s on it this week and haven't had a chance to fly it. The Backcountry Cub I finished in 2011 will cruise 115-120 with a 185hp O-320 and 74x56 cruise prop and a stock wing.. This one does get off quick and climbs like crazy but hoped for a bit more on the top end. But after all is said and done the customer is happy with it. Don

SJ
04-27-2017, 10:40 AM
Don, in my experience, 2 blade props are also faster than 3 blades...

sj

pittsdriver
04-27-2017, 11:00 AM
In hindsight I would go with the new Hartzell composite.

skywagon8a
04-28-2017, 07:42 AM
You have mentioned your weight which you consider heavy. You have not addressed your loaded for flight CG. You do have some draggy items on that plane which accounts for some of the speed loss. I have preached CG until I'm blue in the face and I suspect that is part of your situation. Forward CG requires a lot of nose up trim which translates into mucho drag. Try a flight ballasted to the rear limit of 20" and report back here.

pittsdriver
04-28-2017, 08:32 AM
I agree that could be the culprit as it is on the noseheavy side. We'll load it up and report back.