Building myths. Is scratch building really less expensive?
Posted: Sat Mar 16, 2024 12:43 pm
by flyguy0609
I’m on a roll today.
My to purchase tool list includes a 3 axis Digital read-out, A rotary Table and a power feed. Total cost is roughly $1,500.00. I desperately need these tools for my end mill in order to fabricate parts that cost maybe $500 from SONEX. Not to mention the extra Month or two or more needed to Install, calibrate and fabricate said tools.
The hardest part about building an airplane is keeping my ego in check.
Re: Building myths. Is scratch building really less expensi
Posted: Sat Mar 16, 2024 2:22 pm
by Bryan Cotton
The purpose of the hobby is to buy tools. Well done!
Re: Building myths. Is scratch building really less expensi
Posted: Sat Mar 16, 2024 7:06 pm
by Skippydiesel
Bryan Cotton wrote:The purpose of the hobby is to buy tools. Well done!
Love it!
Re: Building myths. Is scratch building really less expensi
Posted: Sun Mar 17, 2024 8:09 pm
by mike.smith
I’ve been flying my scratch built for 10 years, now, so costs have increased. But I spent $28,000 all-in, including materials and tools. AeroVee 2.1, smoke system, MGL Xtreme Mini, transponder, MGL panel mount radio, uAvionix ADSB in/out, ELT, polished finish (Rustoleum rattle can paint on cowl and other fiberglass). Others who are good scroungers and simpler avionics have built for $16,000.
Tools:
- Snips/shears
- Drill press
- Band saw
- Grinder w/ Scotchbrite wheel
- Cordless drill
- Harbor Freight rivet gun
- 5 gal compressor (started w/30 gal, but got rid of it)
- Manual rivet puller
- Files
- Drill bits and uni-bits
- Dremel with cut-off wheel
- Other miscellaneous small stuff
- No other expensive or fancy stuff
There is really no need for anything exotic or fancy to build a Sonex. I gave up using air tools (like a pneumatic drill) about 2 weeks after starting to make parts. I found it unnecessary, and it got frustrating waiting for a 30 gal tank to fill with air. A cordless drill is all you need. I later got a 5 gal compressor for the rivet gun, and that was plenty. Lots of pulls, and it fills up fast.
Re: Building myths. Is scratch building really less expensi
Posted: Sun Mar 17, 2024 10:02 pm
by peter anson
I’ll go along with Mike here. My scratch-built Sonex, complete with Jab 3300 engine came in at a little over A$30,000, about US$21,000 at the time I finished 12 years ago. I did save about A$10,000 by careful scrounging, which mostly worked out OK. The money was spent over a 6 year period rather than as one or two big hits, so it came as a complete surprise to my dear wife when she eventually found how much I had spent. I would guess that it would cost me twice as much to build now. Finishing my Sonex wasn’t the end of the expense however. Since 2012 I have bought 3 propellers, one engine, one canopy, one radio and countless engine parts. Probably best not to keep track of all that.
Peter
Re: Building myths. Is scratch building really less expensi
Posted: Mon Mar 18, 2024 9:02 am
by Area 51%
I appease my wife by regularly pointing out the cost of the current build is still comfortably under the Blue-Book price of her 5 year old Subaru. .
Re: Building myths. Is scratch building really less expensi
Posted: Tue Mar 19, 2024 7:41 am
by kmacht
There is nothing on a scratch built sonex that requires a milling machine a DRO or a rotary table to produce. I scratch built my Sonex for 15k (10+ years ago) and had a full shop including a Bridgeport which was never used once. It was all built with simple hand tools, some scales, a bending brake, a small oxy/acetylene torch and various sanders. There is absolutely no way it is cheaper to buy the full kit than it is to buy just the bare metal and a few inexpensive tools. Scratch building will absolutely take more time and I recommend most people buy the kit as they have a higher chance of finishing but if money is keeping you from building going scratch built will still get you in the air and costs can be spread over time.
Re: Building myths. Is scratch building really less expensi
Posted: Tue Mar 19, 2024 9:37 am
by Kerry Fores
What Keith said.
Kerry Fores
Sonex 9
Scratchbuilt using a 9" tabletop bandsaw I didn’t own.
AirVenture 2006 Plans Built Champion
Ya’ll really should be reading my column and features in KITPLANES magazine.
Re: Building myths. Is scratch building really less expensi
Posted: Tue Mar 19, 2024 10:00 am
by rbarber
I built mine from plans, and had it setting on its wheels for about $6k (sans engine, canopy, instruments, etc.). I believe the kit cost about $14k at that time. I even wasted a couple of sheets of aluminum due to mistakes. I was able to purchase the aluminum at a supplier nearby at a cost of less than half of that of ACS, and no shipping. I can’t tell you how much that matters.
I also enjoyed the challenge of laying out and making the parts, and I think this is important for the scratch builder. If you don’t like doing this, I think the kit is what you need. There are more than 10k holes to be laid out in hundreds of parts. You should read this as “10k opportunities” for mistakes.
Ponder this for what it is.
R.
N157SX (Sexy Hexy)
Gen 4 Jabiru 3300
1250+ hours of impressively stupid stuff in the air (enjoyed nonetheless)
Re: Building myths. Is scratch building really less expensi
Posted: Wed Mar 20, 2024 6:15 am
by peter anson
One other “advantage” of scratch building; I cut out parts so inefficiently that even 12 years after completing my Sonex I still have spare 0.025" sheet 6061. I’ll probably run out before I die, but only if I live well into my 90s.
Peter
Re: Building myths. Is scratch building really less expensi
Posted: Wed Mar 20, 2024 10:05 am
by builderflyer
Along with other early builders, in 1999 I purchased almost all of the aluminum needed to build my Sonex airframe for about $1,000, and that included certifications for the metal. Then, shortly afterwards, the supplier found out that we were using the aluminum to build airplanes and they would no longer fill any order for that purpose. In 2001 I paid $10,700 for a brand new Jabiru 3300 engine. Oh the good old days…now long gone.
Art,Sonex taildragger #95,Jabiru 3300 #261
Re: Building myths. Is scratch building really less expensi
Posted: Wed Mar 20, 2024 2:35 pm
by BobDz
builderflyer wrote:Oh the good old days…now long gone.
Art,Sonex taildragger #95,Jabiru 3300 #261
My next truck will be 2.4 times the cost of my first house…
I know your pain well.
Re: Building myths. Is scratch building really less expensi
Posted: Sat Mar 23, 2024 10:56 am
by flyguy0609
I posted this little lampoon of myself, like in the cartoon when the devil is talking in one ear and the angel in the other. It is just a comment to share that I caught myself jumping down the tools rabbit hole. We all know that building an airplane is full of rabbit holes to explore. Spending $1,500 to make $300 worth of parts is absolutely absurd, and I find the absurdities in life amusing.
I purchased my kit from the estate of the original owner. It was literally a basket case. I fabricate some parts and purchase other parts, depending. I have a bench-top end mill that i use for the final cutting. Works faster than hand filing, Makes good straight and square cuts with very little burring with an accuracy of 0.005". 30 seconds with a Scotch bright wheel and they are done.
Re: Building myths. Is scratch building really less expensi
Posted: Sat Mar 23, 2024 11:56 am
by kmacht
There is no wrong way to make a part and build the plane as long as it confirms to the blueprint. Use what you have. If building the airplane gives you an excuse to buy more tools to make the job easier all the better.
Keith
#554