Congratulations on developing and releasing the aviation conversion of this engine. I’d expect some builders will be interested in it for the Ultracruiser and other experimental aircraft too. Two questions…(1) What are the HP and torque ratings of this v-twin? and (2) What company is the original manufacturer of it? It looks like it might be a Briggs & Stratton or a HF Predator conversion.
Thank you for your questions. HP is enough to fly the UC. We have not put it on a dynamometer. Horse power is estimated to be between 35-40 based on calculations and compared performance with other engines. Original manufacturer is HP Predator 670.
if you know the prop diameter and pitch, and engine rpm, 4200 engine 2359 prop, you can calculate the hp, the didnt reveal the diameter and pitch. its not 35 to 40
I would love to see this engine sold as a kit where we buy the unmodified engine ourselves and then buy a kit and guide from hummel to build it ourselves.
The price tracks. A basic HF predator engine is $1,000. But a Vangaurd or Kohler is $2,000. PSRU's are around $1,000. (See ACE Redrived). Forged connecting rods are going to be $100 apiece, unless custom. Then probably $1,000 for two. Exhausts are $200. Flywheel delete requires new custom carrier for charging system, and magnets for CDi spark, etc. it adds up. I doubt a builder could do all of this for less than $3,000. The additional is of course labor/profit. Each motor probably has 8-10 manhours into it. When items are selling maybe 1 per month, and light commercial hangar shops rent for $2,500/mo. People gotta find a way to stay in business. People have a right to profit from their efforts. I don't see anyone offering something similar for less. How 'bout you?
670 Predator engine is very solid. Can handle upwards of 5000rpm when rebuilt using the billet rods and lightweight billet flywheel. High compression pistons and cam will also help. If build right can output 50hp for takeoff, 40hp for cruise. Check out Red Beard's Garage UA-cam channel.
Built a few of these for 4 wheeler projects and a extremely modified EZ-Go golf cart conversion and the motors are pretty solid up to 4200-4500 with stock innards. Replace the exhaust and intake box with something less restrictive and they easily put out 25-28HP if you dial the carb jets. 1.06mm is what I pair them with and a 3D printed mixer spacer between the carb and intake manafoldish thingy. I'm looking at building one for about 40-45hp for a SD-1 homebuilt plane.
I have a generac 999cc v-twin engine similar to this but not considering aircraft use because of the Harley-Davidson like imbalance of the type. Going instead w 400cc parallel twin Cayuna at half the weight similar power and fuel comsumption.
@@kwhopper1100 shoot me an email with your location and how far you'd like to travel. I'll look for Hummels in your area. Also, send me your height and I'll let you know which one would be best. Sales@hummelaircraft.com
Not sure I hear what you hear. There are helicopters taking off, airplanes landing, booth neighbors pounding stakes. It could just be phone noise which we used for the video. Not sure.
i have seen these come and go for 30 years now lol
Congratulations on developing and releasing the aviation conversion of this engine. I’d expect some builders will be interested in it for the Ultracruiser and other experimental aircraft too. Two questions…(1) What are the HP and torque ratings of this v-twin? and (2) What company is the original manufacturer of it? It looks like it might be a Briggs & Stratton or a HF Predator conversion.
Thank you for your questions. HP is enough to fly the UC. We have not put it on a dynamometer. Horse power is estimated to be between 35-40 based on calculations and compared performance with other engines. Original manufacturer is HP Predator 670.
Hummel: Did you mean HF Predator?
if you know the prop diameter and pitch, and engine rpm, 4200 engine 2359 prop, you can calculate the hp, the didnt reveal the diameter and pitch. its not 35 to 40
I would love to see this engine sold as a kit where we buy the unmodified engine ourselves and then buy a kit and guide from hummel to build it ourselves.
As seen at harbour freight.......so what's the extra 5grand for?
The price tracks. A basic HF predator engine is $1,000. But a Vangaurd or Kohler is $2,000. PSRU's are around $1,000. (See ACE Redrived). Forged connecting rods are going to be $100 apiece, unless custom. Then probably $1,000 for two. Exhausts are $200. Flywheel delete requires new custom carrier for charging system, and magnets for CDi spark, etc. it adds up. I doubt a builder could do all of this for less than $3,000. The additional is of course labor/profit. Each motor probably has 8-10 manhours into it. When items are selling maybe 1 per month, and light commercial hangar shops rent for $2,500/mo. People gotta find a way to stay in business. People have a right to profit from their efforts. I don't see anyone offering something similar for less. How 'bout you?
You should make an exhaust that has 6 outlets down each pipe to make people do a double take! 😁
Any torque/hp figures for comparison to various 1/2 VW?
What is theV-Twin fuel burn at your 3100 cruise RPM??? What is the HP at 4200 RPM??? Have you used it in a Pusher configuration ???
Anyone else nervous about placing your safety in the hands of an engine from Harbor Freight?
No, I'm nervous about placing my safety in the hands of someone who would sell it for over $5k.
670 Predator engine is very solid. Can handle upwards of 5000rpm when rebuilt using the billet rods and lightweight billet flywheel. High compression pistons and cam will also help. If build right can output 50hp for takeoff, 40hp for cruise. Check out Red Beard's Garage UA-cam channel.
Yes
Built a few of these for 4 wheeler projects and a extremely modified EZ-Go golf cart conversion and the motors are pretty solid up to 4200-4500 with stock innards. Replace the exhaust and intake box with something less restrictive and they easily put out 25-28HP if you dial the carb jets. 1.06mm is what I pair them with and a 3D printed mixer spacer between the carb and intake manafoldish thingy. I'm looking at building one for about 40-45hp for a SD-1 homebuilt plane.
Yea, all the parts mentioned might run you another $1000 over the original $1000 price tag.. Maybe..
I have a generac 999cc v-twin engine similar to this but not considering aircraft use because of the Harley-Davidson like imbalance of the type. Going instead w 400cc parallel twin Cayuna at half the weight similar power and fuel comsumption.
harbor freight predator
ther is no imbalance the harley is not the same offset
And somehow I missed your tent this year .
We are in ultralight area right next to where the tram picks up/drops off.
@@hummelaircraft at some point I would like to sit in your planes and see how I fit in them .
@@kwhopper1100 shoot me an email with your location and how far you'd like to travel. I'll look for Hummels in your area. Also, send me your height and I'll let you know which one would be best. Sales@hummelaircraft.com
It would be nice if fuel injection were part of the conversion
Did I hear you say you needed basic med to fly the H5? If it’s a LSA all you need is a sport pilot license which only requires a Drivers License
Basic med is required for private and above. The H5 can be flown under sport pilot and that needs drivers license.
@@hummelaircraft unless you have been previously denied a medical
He says we're not working this hard. He hee
No dual ignition option?
No, not currently.
May not be needed on a 4 stroke. After all how often if ever as the ignition failed on your car or truck?
you can get dual ignition with the vanguard 23 (widely used in eu aviation for decades) and the heads from carrier performance, new option jan 2024
Why didn't you ask about horsepower?? Useless video.
We estimate around 35hp which is ok for the Ultracruiser. Not sure about fitness for duty in other airframes.
Mike, your comment is useless. Why all the negativity?
if you know the diameter and pitch, and rpm 4200 engine 2359 prop , you can figure out the hp, factor the redrive in.
what is that annoying pinging noise throughout the video ????
Not sure I hear what you hear. There are helicopters taking off, airplanes landing, booth neighbors pounding stakes. It could just be phone noise which we used for the video. Not sure.
No pinging heard here....
Yeah the pinging noise is constant, every few seconds.
I was watching this video whilst sat on the toilet....... I thought I was leaking, until I realised the sound was on the video 😊